文献类型：期刊文献

英文题名：Influence of design load determination method for SC-BRBs with trilinear flag-shaped hysteresis behaviour on the seismic performance of braces and structures

作者：Xie, Qin Zhou, Zhen Huang, Linjie

第一作者：Xie, Qin;谢钦

通信作者：Zhou, Z[1]

机构：[1]Southeast Univ, Minist Educ, Key Lab Concrete & Prestressed Concrete Struct, Nanjing 210096, Peoples R China;[2]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China;[3]Nanjing Forestry Univ, Coll Civil Engn, Nanjing 210037, Jiangsu, Peoples R China

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

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

年份：2023

卷号：289

外文期刊名：ENGINEERING STRUCTURES

收录：;EI(收录号：20232114121387);Scopus(收录号：2-s2.0-85159627762);WOS:【SCI-EXPANDED(收录号:WOS:001001481000001)】；

基金：The research described in this paper was sponsored by "National Natural Science Foundation of China" (52108449) , "China Postdoctoral Science Foundation" (2021 M690621) , "The Science and Technology Department of Guizhou Province" ( [2020]1Y249) , "Academic Cultivation and Innovative Exploration Project of Guizhou Institute of Technology" (GZLGXM-10) . The supports are gratefully acknowledged.

语种：英文

外文关键词：Self-centering brace; Trilinear model; Design load; Hysteresis behaviour; Seismic response

摘要：Self-centering buckling-restrained braces (SC-BRBs) can effectively reduce the residual deformation and seismic damage of the main structure. Because the first loading curve and subsequent loading curve of SC-BRB trilinear flag-shaped hysteresis behaviour do not coincide, there are two ways to determine the design load of a brace, i.e., the design load is taken as either the bearing force Fy1 at the first stiffness change point of the first loading curve or the bearing force Fy2 at the stiffness change point of the subsequent loading curve. In this study, a numerical analysis method is used to study the differences in the hysteresis performance of braces (i.e., SC-BRB-Fy1 and SCBRB-Fy2) and the seismic performance of structures (i.e., SCBF-Fy1 and SCBF-Fy2) based on different design load determination methods. The results demonstrate that when the strength ratio beta and the first stiffness ratio alpha c are similar, the hysteresis performance of braces and the seismic performance of structures are basically the same regardless of the method of design load determination. Decreasing beta or increasing alpha c significantly increases the maximum axial force of SC-BRB-Fy1 but has little effect on that of SC-BRB-Fy2. Decreasing beta can enhance the energy dissipation capacity of braces, reduce the maximum displacement of structures during earthquakes, and reduce the deformation concentration effect of SCBF-Fy2 but has no obvious influence on the deformation mode of SCBF-Fy1. Increasing alpha c can improve the energy dissipation capacity of SC-BRB-Fy1 but weaken the energy dissipation capacity of SC-BRB-Fy2, which has the opposite effect on the displacement response of SCBF-Fy1 and SCBF-Fy2.