Experimental behaviour of anchor bolts under pullout and relaxation tests

The anchoring between a metallic component and a concrete block is an essential point in stability and durability of the structure. This joint has to transfer the deadweight of the structure and tensile, compressive and shearing loads created by the structure in service. This study focuses on the jo...

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Bibliographic Details
Published in:Construction & building materials 2010-03, Vol.24 (3), p.266-274
Main Authors: Delhomme, F., Debicki, G., Chaib, Z.
Format: Article
Language:English
Subjects:
Analysis
Anchor
Anchors
Bond
Bonds
Building materials industry
Civil Engineering
Concrete
Concrete blocks
Concretes
Construction materials
Creep
Creep (materials)
Engineering Sciences
Laws, regulations and rules
Modelling
Production management
Pull-out test
Shrinkage
Stress relaxation tests
Structures
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Summary:The anchoring between a metallic component and a concrete block is an essential point in stability and durability of the structure. This joint has to transfer the deadweight of the structure and tensile, compressive and shearing loads created by the structure in service. This study focuses on the joint constituted of long anchor bolts cast-in-place. The anchor rods are prestressed in order to minimize the effects of fatigue stress. To design these anchors the long-term behaviour of concrete is not taken into account whereas the concrete creep and shrinkage involves a decrease in the initial prestress level. This paper presents experimental results of pull-out tests and mass-spring modelling of the joint is proposed. In this model the long-term behaviour of the joint is taken into account using the creep and shrinkage laws given in Eurocode 2. The modelling of the evolution in time of the rod prestress shows good agreement with the measurements obtained in relaxation tests.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2009.08.038