Experimental behaviour of anchor bolts under pullout and relaxation tests |
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| Affiliation: | 1. Laboratory of Civil and Environmental Engineering (LGCIE), INSA Lyon, 69621Villeurbanne, France;2. French Industrial and Mechanical Technical Centre (CETIM), 42952 Saint Etienne, France;1. School of Civil Engineering & Mechanics, Huazhong University of Science & Technology, 430074 Wuhan, China;2. Balochistan University of Information Technology, Engineering and Management Sciences, Baleli, Quetta, Pakistan;1. Dept. of Architecture, Built Environment and Construction Engineering, Politecnico di Milano, P.za Leonardo da Vinci 32, 20133, Milan, Italy;2. Construction Technologies Institute, Italian National Research Council (ITC-CNR), Viale Lombardia 49, San Giuliano Milanese, MI, Italy;1. Faculty of Engineering and Physical Sciences (J5), University of Surrey, Guildford, Surrey GU2 7XH, UK;2. Department of Strength of Materials and Structural Engineering (RMEE), Polytechnic University of Catalonia, Terrassa 08222, Spain;1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China;2. Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Science, 610041 Chengdu, China;3. Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing 100101, China;4. China 19th Metallurgical Corporation, China |
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| Abstract: | 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. |
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