文献类型：期刊文献

英文题名：Behaviour of BFRP tendon systems under cyclic loading and its influence on the dual-tube SC-BRB hysteretic performance

作者：Xie, Qin Zhou, Zhen Meng, Shao-Ping

第一作者：谢钦;Xie, Qin

通信作者：Zhou, Z[1]

机构：[1]Southeast Univ, Key Lab Concrete & Prestressed Concrete Struct, Minist Educ, Nanjing 210096, Peoples R China;[2]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China

第一机构：Southeast Univ, Key Lab Concrete & Prestressed Concrete Struct, Minist Educ, Nanjing 210096, Peoples R China

通信机构：corresponding author), Southeast Univ, Key Lab Concrete & Prestressed Concrete Struct, Minist Educ, Nanjing 210096, Peoples R China.

年份：2020

卷号：259

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：;EI(收录号：20203509115392);Scopus(收录号：2-s2.0-85089917932);WOS:【SCI-EXPANDED(收录号:WOS:000573930300003)】；

基金：The research described in this paper was sponsored by ``National Key Research and Development Program of China"(2018YFC0705700), "National Natural Science Foundation of China" (51878150), `"Six Talent Peaks Project" of Jiangsu Province (JZ-003), Opening Funds of Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, "The Science and Technology Department of Guizhou Province" ([2020]1Y249), High-level Talent Research Funding Project of Guizhou Institute of Technology (XJGC20190907). The supports are gratefully acknowledged.

语种：英文

外文关键词：Self-centering; Pretensioned tendon; Cyclic loading; Pretension loss; Hysteretic performance

摘要：Basalt fibre-reinforced polymer (BFRP) is an excellent pretensioned tendon material due to its high elongation, and it has been used in the self-centering buckling-restrained brace (SC-BRB). During previous experiments on SC-BRBs, although the BFRP tendon did not cause anchorage slip failure, pretension loss occurred. To determine the cause of the pretension loss, in this paper, cyclic tensile tests were conducted on multiple sets of BFRP tendon systems. Based on the experimental results, the pretension loss of the SC-BRB was due to the deformation of the colloid in the anchor under cyclic loading, and the regression formula of the colloidal deformation of the anchor was established. According to the results of a quasi-static experiment on a SC-BRB, the BFRP tendon can provide a reliable self-centering restoring force for the brace, and the accuracy of estimating the pretension loss based on the regression formula is demon-strated. Finally, a rheological model that can accurately describe the hysteresis performance of the SC-BRB and consider the pretension loss is established. Based on this model, the influence of the pretension loss on the brace performance is studied. (C) 2020 Elsevier Ltd. All rights reserved.