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  • 1.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Active earth pressure build-up: a trigger mechanism in large landslides in sensitive (quick) clays1981Report (Other academic)
  • 2.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Active earth pressure build-up: a trigger mechanism in large landslides in sesitive (quick) clays1983In: Symposium on slopes on soft clays: Linköping March 8-10, 1982, Linköping: Statens geotekniska institut (SGI) , 1983, p. 55-67Conference paper (Refereed)
  • 3.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Analys av progressiva skred utförda av Con-Geo: Bilaga till Skredet i Småröd, Rapport 1 - Skredorsak2007Report (Other academic)
  • 4.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Angående Statens Geotekniska Instituts Rapport Nr 18: "Un élefphant naît une souris"1983In: Geotekniknytt (och lite gammalt), Vol. 1983, no 1, p. 1-17Article in journal (Other academic)
  • 5.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Brittle Failures in Normally Consilidated Soils1978In: Väg- och Vattenbyggaren, ISSN 0042-2177, Vol. 1978, no 8-9, p. 49-Article in journal (Other (popular science, discussion, etc.))
  • 6.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Down-hill progressive landslides in soft clays: Triggering disturbance agents, Slide Propagation over horizontal or gently sloping ground, Sensitivity related to geometry2008Report (Other academic)
    Abstract [en]

    A numerical model is presented and discussed for down-hill progressive landslides in soft clays. A simple-to-use spread sheet is given and used in order to illustrate the influence of the sensitivity of the clay and the geometry of the ground. The model is also used to discuss the agents and the mechanisms that formed the large landslide in Surte at the Göta River in 1950.

  • 7.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Dynamic response of buildings on breakwater in Monaco1993In: Proceedings of the International Colloquium on Structural Serviceability of Buildings, Zürich: International Association for Bridge and Structural Engineering, 1993, p. 291-296Conference paper (Refereed)
  • 8.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Grouting in sedimentary and igneous rock with special reference to pressure induced deformations2004Report (Other academic)
    Abstract [en]

    After a short introduction in Chapter 1, typical properties of sedimentary rocks are given in Chapter 2, exemplified with limestone formations in the Malmö Region in southern Sweden. Two main grouting techniques are defined in Chapter 3, grouting by permeation (pressure not causing fracture in the rock) and grouting by hydraulic fracturing (pressure causing opening of existing fissures or tensile fracture in the rock). The deformations caused by the two methods are discussed. Permeation grouting and permeability of different rock materials are discussed in Chapter 4. The permeability of cement based grouts in soil and rock is often overestimated. In a diagram, a relationship is given between Darcy's coefficient of permeability, k [m/s]; and a crack pattern defined by the number of cracks per meter, n [1/m]; crack widths, t [mm]; and crack volume ratio [%]. Hydraulic fracturing is treated in Chapter 5. For confined conditions, equations and diagrams are given for the maximum gap deformation in the cracks and for the widths of the grouted zone. The equations and diagrams are given as functions of the injected grout volume per round and the ratio of the modulus of Elasticity and the injection pressure. Two loading cases are treated: (a) two-dimensional loading with a grouting zone length L [m] and (b) conical loading with a grouting zone diameter D [m]. For unconfined conditions the risk for spreading of the grout is discussed. The importance of the deformations is illustrated with case studies. Final remarks are given in Chapter 6. One main conclusion is that the injection pressure is not a satisfactory stop criterion. As unintended hydraulic fractures often take place, when permeation grouting is intended, an uncontrolled spread of grout may occur. Instead, the volume of grout injected per stage, or round, should be limited. It is often best to inject small amounts of grout, in several rounds, allowing the grout to stiffen between the rounds. This procedure is illustrated with two examples in an Appendix.

  • 9.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Icke-Linjär deformationsanalys vid beräkning av släntstabilitet: Är det en nödvändig eller en onödig komplikation?1981Report (Other academic)
  • 10.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Lerors hållfasthet och deformationsegenskaper i konstruktioner där leran icke ugör den enda stabiliserande komponenenten1975In: NGM 75: Nordisk Geoteknikermöde i Köbenhavn 22-24.5.1975, Köbenhavn: Polyteknisk Boghandel og Forlag, 1975, p. 155-172Conference paper (Refereed)
  • 11.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    On limit criteria for plastic failure in strain rate softening soils1985In: Proceedings of the eleventh International Conference on Soil Mechanics and Foundation Engineering: San Francisco/12-16 August 1985, Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands , 1985, Vol. 2, p. 397-400Conference paper (Refereed)
    Abstract [en]

    Deals with aspects of stability criteria for extensive slopes if the limiting large strain strength of the soil is strain rate dependent. The issue is exemplified by means of a mechanical model

  • 12.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    On transmission of restraint via construction joints in concrete structures1997In: Selected research studies from Scandinavia: dedicated to professor Göran Fagerlund on his 60th anniversary November 11, 1997, Lund: Lund Institute of Technology, Division of Building Materials , 1997, p. 22-27Chapter in book (Other academic)
  • 13.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Practical measures for avoidance of cracking case records1994In: General reports of the International Symposium Thermal Cracking in Concrete at Early Ages: Munich, October 10-12, 1994 - technical recommendations (drafts) RILEM Technical Committee 119 TC, state of the art reports (drafts) RILEM Technical Committee 119 TCE / [ed] Rupert Springenschmid, Baustoffinstitut der TU München , 1994, Vol. 1, Session H, p. 74-86Conference paper (Refereed)
  • 14.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Practical measures to avoiding early age thermal cracking in concrete structures1998In: Prevention of thermal cracking in concrete at early ages: state of the art report prepared by RILEM Technical Committee 119, Avoidance of Thermal Cracking in Concrete at Early Ages, London: Taylor and Francis Group , 1998, p. 255-314Chapter in book (Other academic)
  • 15.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Progressive landslides in long natural slopes: Formation, potential extension and configuration of finished slides in strain-softening soils2011Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    After the large landslide in Tuve (Gothenburg, 1977), the author began developing a finite difference model for slope stability analysis taking the deformation-softening of soft sensitive clays into consideration. In the model, the mean down-slope deformation in each element caused by normal forces is maintained compatible with the deformation generated by shear stresses. He developed software for the model and presented it at international soil mechanics conferences during the 1980-ies. In 2000 he summarized his findings in a Licentiate thesis. An easy-to-use spread-sheet has also been developed. In this thesis the author conveys his experiences of slide modeling focusing on the nature of triggering agents and the different phases that a slope may undergo before its stability becomes truly critical.

  • 16.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Progressive landslides in long natural slopes: potential extension and configuration of finished slides in strain-softening soils2000Licentiate thesis, monograph (Other academic)
    Abstract [en]

    A finite difference method is presented for progressive slides in long natural slopes. The method is based on a strain softening material model. A detailed worked out example is given as well as examples using a spread sheet PC program and a PC program for Windows. Several Scandinavian slides are analysed and discussed as case studies e g Tuve (1977), Surte (1951), Bekkelaget (1953), Rollsbo (1967), Rävekärr (1971), Tre-styckevattnet (1990) and Svärtaån (1938). The nature of down-slope progressive failures in natural slopes is described and the applicability of ideal-plastic failure analysis is questioned. Principles and procedures for investigation potential landslides are presented. A short historical background to the landslide problem is given in an introductory chapter.

  • 17.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Relationship between the appearence of a finished landslide and the mechanisms acting during the slide1984In: NGM-84, Nordiskt Geoteknikermöte 1984 i Linköping, Linköping: Statens geotekniska institut (SGI) , 1984, p. 409-416Conference paper (Refereed)
  • 18.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Sprickbildning i betongpålar slagna i vatten eller i jordarter med hög permeabilitet1992Report (Other academic)
    Abstract [sv]

    Skador på grund av hydraulisk utmattning eller "vattensprängning" av betongpålar har samband med följande faktorer: » Närvaro av fritt vatten eller grundvatten i jord med hög permeabilitet. » Omväxlande stora tryck- och dragspänningar i pålen under slagning, vilket medför utmattning av betongmaterialet. » Utmattningsmekanismerna i betong förstärks genom insugning och utpressning av vatten under stort tryck i förekommande spricksystem. » Förekomst av genomgående sprickor, anslutande tvärsprickor och mikrosprickor. » Sprickviddens variation med hänsyn till i betongen initiellt förekommande egenspänningar av temperatur, krympning och volymändringar av hydratation. Sprickor med mot ytskikten avtagande vidd är speciellt ofördelaktiga. Ogynnsam variation hos sprickvidden ökar med tilltagande dimensioner hos pålens tvärsnitt. » Betongens tryck- och draghållfasthet jämte andra mekaniska egenskaper hos betongen i pålelementet. » Pålens konstruktiva utformning, speciellt m h t armeringens storlek och fördelning över påltvärsnittet. Bygeldelning. » Geotekniska förhållanden. » Slagningsbetingelser. Stora tryck- och dragspänningar uppkommer företrädesvis vid hård slagning av långa pålar i relativt fasta leriga eller siltiga friktionsjordarter, varvid situationen kännetecknas av att mantelmotståndet (vanligen på grund av porvattenundertryck) är stort samtidigt som spetsmotståndet är litet eller måttligt. Typiskt för dessa tillstånd är att pålskallens fjädring är stor i förhållande till dess kvarstående sjunkning. Tendenser till uppträdande av stora dragkrafter kan diagnosticeras och övervakas med hjälp av modem stötvågsmätningsteknik.

  • 19.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Sprickrisk i grova betongkonstruktioner1992In: Betong, ISSN 1101-9190, Vol. 2, no 3, p. 22-26Article in journal (Other (popular science, discussion, etc.))
  • 20.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    The landslide at Tuve, nov. 19771983In: Symposium on slopes on soft clays: Linköping March 8-10, 1982, Linköping: Statens geotekniska institut (SGI) , 1983, p. 69-97Conference paper (Refereed)
  • 21.
    Bernander, Stig
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Dury, Robin
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Laue, Jan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Knutsson, Sven
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Elfgren, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
    Progressive Landslide Analysis in Canadian Glacial Silty Clay in Churchill River2017In: / [ed] Vikas Thakur, Jean-Sébastien L’Heureux, Ariane Locat, 2017, p. 1-Conference paper (Other academic)
    Abstract [en]

    The poster presents the risks for a progressive landslide in a natural dam. The stability will be critical when the water level is raised after the building of a hydro power plant, Bernander (2016), Dury (2017). The analysis is based on a finite difference method developed by Stig Bernander (2011), Bernander et al.(2016)

     

    The following issues will be discussed:  

    - Material properties

    - Risk for liquefaction

    - Three possible failure surfaces: one horizontal, one inclined and one curved

    - Failure riska for different material propeties

    - The need to check the real properties of the soil

  • 22.
    Bernander, Stig
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Elfgren, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
    Riverbank stability in loose layered silty clays: Comments on the North Spur Dam at Muskrat Falls in Churchill River, Labrador, Newfoundland2017Report (Refereed)
    Abstract [en]

    The differences are outlined in landslide analysis between the classic limit equilibrium method with assumed plastic properties of the soil and a progressive analysis applying softening material properties.

    The risk for failure is studied in the dam at the North Spur riverbank ridge at Muskrat Falls in Churchill River in Labrador, Newfoundland, Canada. A sloping failure surface is much more critical than the horizontal surfaces which have hitherto been studied. Results from new analyses have now been obtained applying softening material properties probable for the ridge. The results indicate safety factors lower than 0.5, i.e. there is a high risk that the ridge will fail if the water level is raised to the proposed level.

    Three reports are appended where Stig Bernander argues in detail for the need for a proper progressive failure analysis based on measured material properties. He also proposes how such properties may be obtained and gives an example of a way to stabilize the ridge if the soil properties show a softening behaviour. Finally examples of progressive failure analyses are included using probable material properties.

  • 23. Bernander, Stig
    et al.
    Emborg, Mats
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Assessment of the risk of internal cracking in hardening concrete1990In: Proceedings: Nordic Concrete Research Meeting : Trondheim 1990 / [ed] Jens Jacob Jensen, Oslo: Norsk Betongforening , 1990, p. 302-303Conference paper (Refereed)
  • 24. Bernander, Stig
    et al.
    Emborg, Mats
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Early age thermal crack control: industrial benefits of new technology1997In: Selected research studies from Scandinavia: dedicated to professor Göran Fagerlund on his 60th anniversary November 11, 1997, Lund: Lund Institute of Technology, Division of Building Materials , 1997, p. 14-21Chapter in book (Other academic)
  • 25. Bernander, Stig
    et al.
    Emborg, Mats
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Risk of cracking in massive concrete structures: new developments and experiences1995In: Thermal cracking in concrete at early ages: proceedings of the international symposium held by RILEM at the Technical Univ. of Munich ..., Oct. 10-12, 1994 / [ed] Rupert Springenschmid, London: Spon press, 1995, p. 385-392Conference paper (Refereed)
  • 26. Bernander, Stig
    et al.
    Emborg, Mats
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Temperaturförhållanden och sprickbegränsning i grova betongkonstruktioner1992In: Betonghandbok. Arbetsutförande: projektering och byggande, Solna: Svensk byggtjänst , 1992, 2, p. 639-666Chapter in book (Other (popular science, discussion, etc.))
  • 27.
    Bernander, Stig
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Gustås, Hans
    Skanska.
    Olofsson, Jan
    Skanska.
    Improved model for progressive failure analysis of slope stability1989In: Proceedings of the twelfth International Conference on Soil Mechanics and Foundation Engineering, Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands , 1989, Vol. 21/3, p. 1539-1542Conference paper (Refereed)
  • 28.
    Bernander, Stig
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Gustås, Hasse
    Skanska.
    Consideration of in sity stresses in caly slopes with special reference tp progressive failure analysis1984In: NGM-84, Nordisk Geoteknikermöte 1984 i Linköping, Linköping: Statens geotekniska institut (SGI) , 1984, p. 417-430Conference paper (Refereed)
  • 29.
    Bernander, Stig
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Gustås, Hasse
    Skanska.
    Consideration of in sity stresses in clay slopes with special reference to progressive failure analysis1984In: Canadian case histories: landslides: Preprint volume for the 37. Canadian Geotechnical Conference organized jointly with the 4. International Symposium on Landslides, Totonto: Univ. Toronto Press , 1984Conference paper (Refereed)
  • 30.
    Bernander, Stig
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Gustås, Hasse
    Skanska.
    Dynamisk studie av ett progressivt brott i en naturlig slänt1984In: NGM-84, Linköping: Statens geotekniska institut (SGI) , 1984, p. 431-442Conference paper (Refereed)
  • 31. Bernander, Stig
    et al.
    Jonasson, Jan-Erik
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Nilsson, Martin
    Inverkan av eftergivlighet hos underlaget på spänningar i nygjutna betongkonstruktioner1997In: Bygg & Teknik, ISSN 0281-658X, no 7, p. 25-27Article in journal (Other (popular science, discussion, etc.))
  • 32.
    Bernander, Stig
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Kullingsjö, Anders
    Skanska Teknik, Göteborg, Chalmers University of Technology.
    Gylland, Anders K
    Multiconsult, Norwegian University of Science and Technology (NTNU), Trondheim.
    Bengtsson, Per-Evert
    Statens Geotekniska Institut, Linköping, PEB Geoteknik.
    Pusch, Roland
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Knutsson, Sven
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Olofsson, Jan
    Skanska Sverige AB, Skanska Teknik, Göteborg.
    Elfgren, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
    Downhill Progressive Landslides in Long Natural Slopes: Triggering Agents and Landslide Phases modeled with a Finite Difference Method2016In: Canadian geotechnical journal (Print), ISSN 0008-3674, E-ISSN 1208-6010, Vol. 53, no 10, p. 1565-1582Article in journal (Refereed)
    Abstract [en]

    A large landslide in Tuve (Gothenburg, Sweden 1977) initiated the development of a model for slope stability analysis taking the deformation-softening of soft sensitive clays into consideration. The model studies triggering agents and five phases in progressive slope failure are identified: (1) in-situ, (2) disturbance, (3) unstable ‘dynamic’, (4) transitory (or permanent) equilibrium, and (5) ‘global’ failure. The clay resistance in these phases may differ widely; mostly due to different rates of loading. Two time dependent failure criteria are defined: (i) the triggering load condition in the disturbance Phase (2), and (ii) the transitory equilibrium in Phase (4), indicating whether minor downhill displacements or a veritable landslide catastrophe will occur. The analysis explains why downhill landslides tend to spread over vast areas of almost horizontal ground further down-slope. The model has been applied to landslides in Scandinavia and Canada. Three case studies are briefly discussed. The model is a finite difference approach, where local downhill deformations caused by normal forces is maintained compatible with deviatory shear deformations above the potential (or the established) failure surface. Software and an easy-to-use spreadsheet are introduced as well as recent developments. See also Video Abstract.

  • 33.
    Bernander, Stig
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Olofsson, Ingvar
    Skanska.
    On Formation of Progressive Failures in Slopes1981In: Proceedings of the Tenth International Conference on Soil Mechanics and Foundation Engineering, Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands , 1981, Vol. 3, p. 357-362Conference paper (Refereed)
  • 34.
    Bernander, Stig
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Olofsson, Ingvar
    Skanska.
    Synpunkter på orsaker till Tuveskredet1981Report (Other academic)
  • 35.
    Bernander, Stig
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Svensk, Ingemar
    Skanska, Göteborg.
    On the brittleness of soft clays1983In: Symposium on slopes on soft clays: Linköping March 8-10, 1982, Linköping: Statens geotekniska institut (SGI) , 1983, p. 99-112Conference paper (Refereed)
  • 36.
    Bernander, Stig
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Svensk, Ingmar
    Luleå tekniska universitet.
    On the brittleness of soft clays1982Report (Other academic)
  • 37.
    Bernander, Stig
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Svensk, Ingvar
    Skanska.
    On the Brittleness of Soft Clays and its Effects on Slope stability1982In: Väg- och Vattenbyggaren, ISSN 0042-2177, no 7-8Article in journal (Other (popular science, discussion, etc.))
  • 38.
    Bernander, Stig
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Svensk, Ingvar
    Skanska.
    Holmberg, Gunnar
    Skanska.
    Bernander, Jarl
    Skanska.
    Isacsson, K
    Skanska.
    Shear strength and deformation properties of clays in direct shear tests at high strain rates1985In: Proceedings of the eleventh International Conference on Soil Mechanics and Foundation Engineering, Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands , 1985, Vol. 2/B/5, p. 987-990Conference paper (Refereed)
  • 39.
    Daerga, Per-Anders
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Bernander, Stig
    Emborg, Mats
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Egenspänningar i undervattensgjutna bottenplattor: inverkan av temperaturförlopp under hydratationen1986Report (Other academic)
  • 40. Dury, Robin
    et al.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
    Kullingsjö, Anders
    Skanska Teknik AB.
    Laue, Jan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Knutsson, Sven
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Pusch, Roland
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Elfgren, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
    Progressive Landslide Analysis with Bernander Finite Difference Method2017In: / [ed] Vikas Thakur, Jean-Sébastien L’Heureux, Ariane Locat, 2017, p. 1-Conference paper (Other academic)
    Abstract [en]

    The poster presents a new Spreadsheet developed by Robin Dury (2017) to simplify the use of the Finite Difference Method developed by Stig Bernander et al (2011, 2016).

    It includes:

    - Material Properties

    - Finite Difference Method

    - Progressive failure process with five phses

    - Discussion

    - References

  • 41.
    Elfgren, Lennart
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
    Knutsson, Sven (Author of introduction, etc.)
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Response to and Comments on “Geotechnical Peer Review of Dr. S. Bernander’s Reports and Analysis of the North Spur”2018Report (Other academic)
    Abstract [en]

    The concerns regarding the stability of the North Spur can be summarized in three points:

    (1) None of the most critical inclined failure surfaces have been studied by Muskrat Falls Corporation. These failure surfaces may be initiated on the upstream side of the dam containment. Here the effects of the deformations, caused by the pressure of the rising water level, have to be resisted by the metastable soil layers in the North Spur. A local failure may occur progressing downwards towards the downstream side of the Spur. A catastrophic dam breach would follow. The GPRP further categorically overlooks the fact that horizontal failure planes cannot possibly represent the highest risk of instability irrespective of whether the analysis is based on the Limit Equilibrium Mode (LEM) or on the Progressive Failure Mode.

    (2) The stress/strain deformation properties of the porous soils in the North Spur have not been made available. Only strength properties, related to fully drained conditions, have been given. How stresses relate to simultaneous deformations under undrained (or partially undrained) conditions have not been defined in any way. Such relationships are crucially essential for any up-to-date analysis of slope stability.

    (3) A high risk of North Spur instability has been found related to impoundment.  A series of investigatory calculations have been made, based on deformation properties from similar landslides and on a wide variety of assumed input data for possible critical failure surfaces. The results of these analyses indicated a safety factor far below 1.

    The peer review does not address the above three points. It gives a good view of the general conditions but also contains misconceptions, erroneous considerations and refutable comments indicating that the earlier reports by Bernander have not been fully understood by the panel members.

    As no up-to-date analysis of the stability of the North Spur has been provided, our conclusion is that an independent group of experts, appointed by government, should be entrusted with this important task.

  • 42.
    Elfgren, Lennart
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Bernander, Stig
    Emborg, Mats
    Gabrielsson, Henrik
    Groth, Patrik
    Luleå tekniska universitet.
    Hedlund, Hans
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Jonasson, Jan-Erik
    Nilsson, Martin
    Noghabai, Keivan
    Ronin, Vladimir
    Westman, Gustaf
    Design of high performance concrete structures: a Swedish design handbook1999In: Utilization of high strength/high performance concrete: proceedings : symposium in Sandefjord, Norway 20-24 June 1999 / [ed] Ivar Holand; Erik J. Sellevold, Oslo: Norsk Betongforening , 1999, p. 232-242Conference paper (Refereed)
  • 43.
    Emborg, Mats
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Bernander, Stig
    Assessment of risk of thermal cracking in hardening concrete1994In: Journal of Structural Engineering, ISSN 0733-9445, E-ISSN 1943-541X, Vol. 120, no 10, p. 2893-2912Article in journal (Refereed)
    Abstract [en]

    At the Luleå University of Technology, research has been performed on thermal stresses and thermal cracking in maturing concrete in the last decade. Laboratory tests have been carried out providing material data for calibration of a proposed theoretical model for thermal stress analysis in young concrete. The laboratory tests included creep tests, free thermal volume change tests and relaxation tests. In the theoretical model, the thermal properties and the transient mechanical properties of the young maturing concrete as well as the restraint within the concrete element are considered. The model has been implemented in a computer program permitting the analysis of different concreting scenarios of which some examples are shown. In the examples, influences of different measures against cracking as well as influences of changes in temperature conditions, restraint, and mechanical behavior of concrete are quantified. For some cases in the computational studies it may be concluded that, for control of early-age thermal stresses and cracking in a structure, it is highly inadequate to consider only the early-age distribution of the temperature field within the studied structures.

  • 44.
    Emborg, Mats
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Bernander, Stig
    Avoidance of early age thermal cracking in concrete structures: predesign, measures, follow-up1995In: Thermal cracking in concrete at early ages: proceedings of the international symposium held by RILEM at the Technical Univ. of Munich ..., Oct. 10-12, 1994 / [ed] Rupert Springenschmid, London: Spon press, 1995, p. 409-416Conference paper (Refereed)
  • 45.
    Emborg, Mats
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Bernander, Stig
    Concrete with no temperature cracks due to hydration process1993In: Proceedings: Nordic Concrete Research Meeting : Göteborg 1993, Oslo: Norsk Betongforening , 1993, p. 227-229Conference paper (Refereed)
  • 46.
    Emborg, Mats
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Bernander, Stig
    Temperature stresses in early age concrete due to hydration1984In: Nordic Concrete Research, ISSN 0800-6377, no 3, p. 28-48Article in journal (Refereed)
    Abstract [en]

    Theoretical models for the analysis of thermal induced stresses in massive concrete structures are presented. Laboratory tests are conducted in order to calibrate the theoretical models for different types of cement, concrete mixtures etc

  • 47.
    Emborg, Mats
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Bernander, Stig
    Thermal stresses computed by a method for manual calculations1995In: Thermal cracking in concrete at early ages: proceedings of the international symposium held by RILEM at the Technical Univ. of Munich ..., Oct. 10-12, 1994 / [ed] Rupert Springenschmid, London: Spon press, 1995, p. 321-328Conference paper (Refereed)
  • 48. Emborg, Mats
    et al.
    Bernander, Stig
    Ekerfors, Katarina
    Luleå tekniska universitet.
    Groth, Patrik
    Luleå tekniska universitet.
    Hedlund, Hans
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Temperatursprickor i betongkonstruktioner: beräkningsmetoder för hydrationsspänningar och diagram för några vanliga typfall. Del A, B och C1997Report (Other academic)
  • 49.
    Emborg, Mats
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Westman, Gustaf
    Luleå tekniska universitet.
    Bernander, Stig
    Assessment of the risk of thermal cracking in hardening high-strength concrete1993In: Utilization of High Strength Concrete : Proceedings: Symposium in Lillehammer, Norway / [ed] Ivar Holand, Oslo: Norsk Betongforening , 1993, p. 1054-1061Conference paper (Refereed)
  • 50.
    Gylland, A. S.
    et al.
    Norwegian University of Science and Technology (NTNU), Trondheim.
    Sayd, M
    Norwegian University of Science and Technology (NTNU), Trondheim.
    Jostad, Hans-Petter
    Norges Geotekniske Institutt, NGI.
    Bernander, Stig
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
    Investigation of soil property sensitivity in progressive failure2010In: Numerical Methods in Geotechnical Engineering: NUMGE 2010 / [ed] Thomas Bentz; Steinar Nordahl, Bosa Roca: CRC Press, 2010, p. 515-520Conference paper (Other academic)
12 1 - 50 of 58
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