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Numerical and Experimental Evaluations of Influence of Member Thickness, Anchor Head Size, and Surface Reinforcement on Tensile Breakout Capacity of Anchor bolts
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0001-9937-6072
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0002-0560-9355
2017 (English)In: Connections between Steel and Concrete / [ed] Akanshu Sharma, Jan Hofmann, Stuttgart, 2017, 752-764 p.Conference paper, Published paper (Refereed)
Abstract [en]

The influence of member thickness, size of anchor head, and orthogonal surface reinforcement on the tensile breakout capacity of cast-in-place headed anchors in uncracked concrete was studied both numerically and experimentally. The aim of this paper is to form a background for developing improved methods for the design of new fastenings as well as the assessment of current anchorages in practice. For this purpose, anchor bolts at various embedment depths (hef=50–500 mm) were simulated in plain and reinforced concrete members of various thicknesses (H=1.5–5.0∙hef). Three different head sizes of anchor bolts (i.e. small, medium and large) were also considered at each anchor embedment depth. Furthermore, to verify the numerical findings, a series of anchor pullout tests were carried out at which the testing parameters were similar to those in the numerical study.

Numerical and experimental results show that the tensile breakout capacity of anchor bolts increases by increasing the member thickness or if surface reinforcement is present. The anchorage capacity further increases with increasing the anchor head size. The anchorage behavior becomes ductile by increasing member thickness or by having surface reinforcement, whereas it becomes stiff and more brittle by increasing the size of anchor head. To account for the influence of member thickness, size of anchor head, and orthogonal surface reinforcement on the tensile breakout capacity of headed anchors, the CC method was modified and extended by incorporating three modification factors.

Place, publisher, year, edition, pages
Stuttgart, 2017. 752-764 p.
Keyword [en]
Anchor Bolt, Headed Anchor, Pullout Load, Cone Breakout, Concrete Splitting, Member Thickness, Anchor-Head Size, Surface Reinforcement, Concrete Capacity Method
National Category
Civil Engineering Infrastructure Engineering Building Technologies
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-65920ISBN: 978-3-945773-06-2 (electronic)OAI: oai:DiVA.org:ltu-65920DiVA: diva2:1146438
Conference
3rd International Symposium on Connections between Steel and Concrete, Stuttgart, September 27–29 2017
Projects
Anchorage to concrete structures
Available from: 2017-10-03 Created: 2017-10-03 Last updated: 2017-11-24Bibliographically approved

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