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Publications (10 of 17) Show all publications
Daerga, P.-A., Girhammar, U. A. & Källsner, B. (2012). Masonite flexible buildning system for multistorey timber buildnings (ed.). In: (Ed.), Pierre Quenneville (Ed.), World Conference on Timber Engineering, WCTE: final papers. Paper presented at World Conference on Timber Engineering : 15/07/2012 - 19/07/2012 (pp. 426-431). : New Zealand Timber Design Society
Open this publication in new window or tab >>Masonite flexible buildning system for multistorey timber buildnings
2012 (English)In: World Conference on Timber Engineering, WCTE: final papers / [ed] Pierre Quenneville, New Zealand Timber Design Society , 2012, p. 426-431Conference paper, Published paper (Refereed)
Abstract [en]

The Masonite Flexible Building (MFB) system is a complete timber building system for commercial and residential multi-storey houses. The system is subdivided into two market variants; XL and Light. The XL version is for tall and large buildings with long floor spans while the Light version is adapted for smaller buildings with lower loads. Though differing in technical performance, the functional criteria are the same for both variants. The MFB system uses prefabricated wall, floor and roof elements which are delivered in flat packages and erected on the construction site. The MFB system might be classified as a panel construction, where the load-carrying structure consists of composite light-weight timber I-beams mechanically integrated with a composite laminated wood panel called PlyBoard™. The Ibeams and the panel form a strong and rigid carcass for wall and floor elements, making the system well suited for high rise construction. A key feature of the MFB system is the connection technique which enables swift erection of the system units on site. The plyboard panels are provided with a continuous slot along the periphery. The slot is used as a general connection interface for the joining of the wall elements. The floor elements are suspended and hooked onto the bearing walls using sheet steel hangers, allowing swift assembling of the floor deck and enabling direct vertical wall-towallload transfer parallel to grain. The paper presents the construction principles, system components and units, erection technique and functional and architectural aspects of the Masonite Building System.

Place, publisher, year, edition, pages
New Zealand Timber Design Society, 2012
National Category
Building Technologies
Research subject
Timber Structures
Identifiers
urn:nbn:se:ltu:diva-27954 (URN)19262726-06f5-45d7-9c55-d2ef5eb1a428 (Local ID)9781622763054 (ISBN)19262726-06f5-45d7-9c55-d2ef5eb1a428 (Archive number)19262726-06f5-45d7-9c55-d2ef5eb1a428 (OAI)
Conference
World Conference on Timber Engineering : 15/07/2012 - 19/07/2012
Note
Godkänd; 2012; 20121017 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-06-08Bibliographically approved
Daerga, P.-A., Girhammar, U. A. & Källsner, B. (2012). Slotted-in steel-plate connections for panel wall elements: experimental and analytical study (ed.). In: (Ed.), Pierre Quenneville (Ed.), World Conference on Timber Engineering: Final Papers - Architecture and Engineering Case Studies. Paper presented at World Conference on Timber Engineering : 15/07/2012 - 19/07/2012 (pp. 451-460). : New Zealand Timber Design Society
Open this publication in new window or tab >>Slotted-in steel-plate connections for panel wall elements: experimental and analytical study
2012 (English)In: World Conference on Timber Engineering: Final Papers - Architecture and Engineering Case Studies / [ed] Pierre Quenneville, New Zealand Timber Design Society , 2012, p. 451-460Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents an experimental and analytical study of a steel plate connection for joining walls in the Masonite Flexible Building (MFB) system. These connections are used partly for splicing the wall elements and partly for tying down uplifting forces and resisting horizontal shear forces in stabilizing shear walls. The steel plates are inserted in a perimeter slot in the plyboard panel (a composite laminated wood panel) and fixed mechanically with screw fasteners. The load-bearing capacity of the slotted-in steel plate connections are determined experimentally and derived analytically for different failure modes. The test results show ductile post-peak load-slip characteristics, indicating that a plastic design method for shear walls can be applied to calculate the horizontal load-bearing capacity. The slotted-in steel plate connection concept can also be used for joining shear walls to transverse walls for tying down purposes in order to simplify the stabilization system of the building. The use of transverse walls for resisting uplifting forces introduces a three-dimensional behaviour of the wall junction and a more effective load transfer.

Place, publisher, year, edition, pages
New Zealand Timber Design Society, 2012
National Category
Building Technologies
Research subject
Timber Structures
Identifiers
urn:nbn:se:ltu:diva-30790 (URN)4bcd261b-e99e-4d09-ab38-70316289ffe0 (Local ID)9781622763054 (ISBN)4bcd261b-e99e-4d09-ab38-70316289ffe0 (Archive number)4bcd261b-e99e-4d09-ab38-70316289ffe0 (OAI)
Conference
World Conference on Timber Engineering : 15/07/2012 - 19/07/2012
Note
Godkänd; 2012; 20121205 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-06-08Bibliographically approved
Daerga, P.-A., Girhammar, U. A. & Källsner, B. (2012). Suspended floor element connections for the masonite flexible building system (ed.). In: (Ed.), Pierre Quenneville (Ed.), World Conference on Timber Engineering: Final Papers - Timber Engineering Challenges and Solutions. Paper presented at World Conference on Timber Engineering : 15/07/2012 - 19/07/2012 (pp. 465-472). : New Zealand Timber Design Society
Open this publication in new window or tab >>Suspended floor element connections for the masonite flexible building system
2012 (English)In: World Conference on Timber Engineering: Final Papers - Timber Engineering Challenges and Solutions / [ed] Pierre Quenneville, New Zealand Timber Design Society , 2012, p. 465-472Conference paper, Published paper (Refereed)
Abstract [en]

The authors present an experimental study of a suspended floor element connection (sheet steel hangers) employed in the Masonite Flexible Building (MFB) system. The hangers are mounted with screws and are pre-attached to the floor elements at manufacturing. This arrangement makes the design of the hanger critical with respect to safety and load transfer redundancy, since the screws transfer all the loads, both withdrawal and shear forces can act simultaneously. Tests have been carried out to examine the structural behaviour of the hanger. The two most critical load cases, vertical floor load and horizontal wind suction load, and three different screw joint configurations were investigated. The results indicate that the vertical distance between the screw joint and the upper edge of the rim beam should be increased and that withdrawal forces on the screws should be kept as low as possible. Some suggestions for improving the present design are given and a modified design is proposed to enhance the load-bearing capacity and to improve the overall safety and redundancy

Place, publisher, year, edition, pages
New Zealand Timber Design Society, 2012
National Category
Building Technologies
Research subject
Timber Structures
Identifiers
urn:nbn:se:ltu:diva-38534 (URN)cf71b34c-9f9b-449d-a46d-47bd965dd7b2 (Local ID)9781622763054 (ISBN)cf71b34c-9f9b-449d-a46d-47bd965dd7b2 (Archive number)cf71b34c-9f9b-449d-a46d-47bd965dd7b2 (OAI)
Conference
World Conference on Timber Engineering : 15/07/2012 - 19/07/2012
Note
Godkänd; 2012; 20121205 (ysko)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2018-06-08Bibliographically approved
Girhammar, U. A., Daerga, P.-A. & Källsner, B. (2011). Recommendations for design of anchoring devices for bottom rails in partially anchored timber frame shear walls (ed.). In: (Ed.), (Ed.), 11th World Conference on Timber Engineering 2010, WCTE 2010: . Paper presented at World Conference on Timber Engineering : 20/06/2010 - 24/06/2010 (pp. 1218-1227). Red Hook: Curran Associates, Inc., 2
Open this publication in new window or tab >>Recommendations for design of anchoring devices for bottom rails in partially anchored timber frame shear walls
2011 (English)In: 11th World Conference on Timber Engineering 2010, WCTE 2010, Red Hook: Curran Associates, Inc., 2011, Vol. 2, p. 1218-1227Conference paper, Published paper (Refereed)
Abstract [en]

The authors have developed a new plastic design method for light-frame timber shear walls. The method is capable of analyzing the load-bearing capacity of partially anchored shear walls. For proper application of the plastic method it is necessary to ensure ductile behaviour of the sheathing-to-framing joints and to avoid brittle failure of the bottom rail in particular. In a partially anchored shear wall the leading stud is not fully anchored against uplift and corresponding tying down forces are developed in the sheathing-to-framing joints along the bottom rail in the sheathing segments close to the leading stud. These tying down forces in the joints may introduce a number of possible brittle failure modes or serviceability problems for the bottom rail that need to be eliminated or restricted in order for the plastic method to be applicable. This paper describes experimental results for proper design of washers or bearing plates for the anchor bolts in order to avoid splitting failure of and excessive washer indentation into the bottom rail. Specimens with both double and single sided sheathing and different locations of anchor bolts are studied. With respect to splitting of the bottom rail, the tests indicate that the failure load depends on the distance from the edge of the washer to the loaded edge of the bottom rail. With respect to large deformations due to bearing stresses of the washers of the anchoring bolts, the size of the washer is the most important parameter. The test results indicate that the bearing strength for large washers is lower than that proposed by Eurocode 5. In this paper, it is therefore proposed to make the bearing strength inverse proportional to the diameter or side length of the washer. Then, good agreement with the test results was found. The results show that failure due to splitting is the determining design mode.

Place, publisher, year, edition, pages
Red Hook: Curran Associates, Inc., 2011
National Category
Building Technologies Infrastructure Engineering
Research subject
Timber Structures; Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-30993 (URN)5055f564-19f6-4645-ba06-deddcb4e68e0 (Local ID)978-162276175-3 (ISBN)5055f564-19f6-4645-ba06-deddcb4e68e0 (Archive number)5055f564-19f6-4645-ba06-deddcb4e68e0 (OAI)
Conference
World Conference on Timber Engineering : 20/06/2010 - 24/06/2010
Note
Godkänd; 2011; 20121217 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-06-08Bibliographically approved
Sagefors, I. & Daerga, P.-A. (1996). An excavation method for large vertical cylindrical caverns (ed.). Paper presented at . Tunnelling and Underground Space Technology, 11(3), 279-285
Open this publication in new window or tab >>An excavation method for large vertical cylindrical caverns
1996 (English)In: Tunnelling and Underground Space Technology, ISSN 0886-7798, E-ISSN 1878-4364, Vol. 11, no 3, p. 279-285Article in journal (Refereed) Published
Abstract [en]

Construction of underground storage chambers in rock has traditionally adopted a construction-oriented approach; the cavern design and the method of excavation have been governed by the capabilities of the equipment available. One example is oil storage in unlined horizontal caverns. Today, however, equipment is no longer a limiting factor. The time has come to integrate the construction and operational aspects in the design process. This paper presents a construction concept developed for large vertical rock caverns with a circular or elliptical horizontal cross-section. The method of excavation, called PBM (Pillar Blasting Method), is condensed into a few main operations which are geometrically separated but overlapping in time. PBM is characterized by two main working sites per cavern, and by long-hole bench-drilling, massive blasting rounds, continuous loading and easy ventilation. Recent developments in drilling and blasting techniques are incorporated, such as the water-driven in-the-hole hammer and the electronic ignition system. PBM enables a high rate of excavation and provides a satisfactory working environment with respect to labour safety and human health (a limited exposure to large openings, no exposure to oil mist and to combustion and explosive fumes, etc). Considerable construction cost savings and time savings may thus be achieved compared to conventional methods of excavation for vertical and horizontal caverns of equal storage volume. A preliminary PCT patent (application No PCT/SE95/00324) has been granted. Examples of applications are fresh-water reservoirs, natural gas reservoirs, subsurface hydroelectric pump power plants, and similar objects which require a large underground storage space in preferably unlined rock caverns.

National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-14699 (URN)10.1016/0886-7798(96)00022-3 (DOI)e1e1712c-b70e-4be7-b1a7-277d06774b58 (Local ID)e1e1712c-b70e-4be7-b1a7-277d06774b58 (Archive number)e1e1712c-b70e-4be7-b1a7-277d06774b58 (OAI)
Note
Godkänd; 1996; 20121213 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-06-08Bibliographically approved
Daerga, P.-A. & Pöntinen, D. (1993). A fatigue criterion for concrete based on deformation (ed.). Paper presented at . Oslo: Norsk Betongforening
Open this publication in new window or tab >>A fatigue criterion for concrete based on deformation
1993 (English)Report (Other academic)
Abstract [en]

A hypothesis is presented for fatigue failure of concrete structures. It is based on a deformation formulation, and utilizes the monotonic F - delta curve and the fatigue creep curve. The hypothesis is applied to flexural fatigue tests on notched beams of a plain high performance concrete. The experimental part comprises monotonic loading in deformation control and constant amplitude loading at three different load levels in flexural tension. The hypothesis is in all essentials consistent with the experimental findings. Furthermore, it provides a deformation formulation for accumulated damage estimation and remaining service life prediction, which takes account for the nonlinear nature of damage development in contrast to the linear Palmgren-Miner hypothesis

Place, publisher, year, edition, pages
Oslo: Norsk Betongforening, 1993
Series
Nordic Concrete Research, ISSN 0800-6377 ; 13:2
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-24932 (URN)d1b39430-205c-11dd-8447-000ea68e967b (Local ID)d1b39430-205c-11dd-8447-000ea68e967b (Archive number)d1b39430-205c-11dd-8447-000ea68e967b (OAI)
Note
Godkänd; 1993; 20080512 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-06-08Bibliographically approved
Daerga, P.-A., Pettersson, M. & Pöntinen, D. (1993). Fracture properties in tension of a high-performance concrete (ed.). In: (Ed.), Ivar Holand (Ed.), Utilization of High Strength Concrete : Proceedings: Symposium in Lillehammer, Norway. Paper presented at International Symposium on Utilization of High-Strength Concrete : 20/06/1993 - 24/06/1993 (pp. 1193-1200). Oslo: Norsk Betongforening
Open this publication in new window or tab >>Fracture properties in tension of a high-performance concrete
1993 (English)In: Utilization of High Strength Concrete : Proceedings: Symposium in Lillehammer, Norway / [ed] Ivar Holand, Oslo: Norsk Betongforening , 1993, p. 1193-1200Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Oslo: Norsk Betongforening, 1993
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-35501 (URN)a0d69150-204d-11dd-8447-000ea68e967b (Local ID)82-91341-00-1 (ISBN)a0d69150-204d-11dd-8447-000ea68e967b (Archive number)a0d69150-204d-11dd-8447-000ea68e967b (OAI)
Conference
International Symposium on Utilization of High-Strength Concrete : 20/06/1993 - 24/06/1993
Note
Godkänd; 1993; 20080512 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-06-08Bibliographically approved
Daerga, P.-A. (1993). Low cyclic fatigue tests on concrete in tension (ed.). In: (Ed.), (Ed.), Proceedings: Nordic Concrete Research Meeting : Göteborg 1993. Paper presented at Nordic Concrete Research Meeting : 17/08/1993 - 19/08/1993 (pp. 177). Oslo: Norsk Betongforening
Open this publication in new window or tab >>Low cyclic fatigue tests on concrete in tension
1993 (English)In: Proceedings: Nordic Concrete Research Meeting : Göteborg 1993, Oslo: Norsk Betongforening , 1993, p. 177-Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Oslo: Norsk Betongforening, 1993
Series
Nordic Concrete Research, ISSN 0800-6377
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-40501 (URN)fa79af90-20d3-11dd-8447-000ea68e967b (Local ID)82-91341-02-8 (ISBN)fa79af90-20d3-11dd-8447-000ea68e967b (Archive number)fa79af90-20d3-11dd-8447-000ea68e967b (OAI)
Conference
Nordic Concrete Research Meeting : 17/08/1993 - 19/08/1993
Note
Godkänd; 1993; 20080513 (ysko)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2018-06-08Bibliographically approved
Daerga, P.-A. (1992). Some experimental fracture mechanics studies in mode I of concrete and wood (ed.). (Licentiate dissertation). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>Some experimental fracture mechanics studies in mode I of concrete and wood
1992 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 1992. p. 22
Series
Licentiate thesis / Luleå University of Technology… → 31 dec 1996, ISSN 0280-8242 ; 1992:12
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-18384 (URN)85fdc200-04b3-11dd-b034-000ea68e967b (Local ID)85fdc200-04b3-11dd-b034-000ea68e967b (Archive number)85fdc200-04b3-11dd-b034-000ea68e967b (OAI)
Note
Godkänd; 1992; 20080407 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-06-08Bibliographically approved
Daerga, P.-A. (1992). Tensile properties of a high performande concrete (ed.). In: (Ed.), Z P Bazant (Ed.), Proceedings of the First International Conference on Fracture Mechnics of Concrete Structures: . Paper presented at International Conference on Fracture Mechanics of Concrete Structures : 01/06/1992 - 05/06/1992 (pp. 465-469). Amsterdam: Elsevier
Open this publication in new window or tab >>Tensile properties of a high performande concrete
1992 (English)In: Proceedings of the First International Conference on Fracture Mechnics of Concrete Structures / [ed] Z P Bazant, Amsterdam: Elsevier, 1992, p. 465-469Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Amsterdam: Elsevier, 1992
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
urn:nbn:se:ltu:diva-34664 (URN)8ec42e10-2010-11dd-8447-000ea68e967b (Local ID)1-85166-869-1 (ISBN)8ec42e10-2010-11dd-8447-000ea68e967b (Archive number)8ec42e10-2010-11dd-8447-000ea68e967b (OAI)
Conference
International Conference on Fracture Mechanics of Concrete Structures : 01/06/1992 - 05/06/1992
Note
Godkänd; 1992; 20080512 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-06-08Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-1247-4601

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