建筑结构学报2024，Vol.45Issue(8)：180-191,12.DOI:10.14006/j.jzjgxb.2023.0227
基于位移放大型变刚度自复位阻尼器的滞回性能研究
Study on hysteretic performance of self-centering dampers based on variable stiffness and displacement amplification
摘要
Abstract
To solve the problem of insufficient post-yield stiffness and strength of SMA dampers,a self-centering damper based on the concept of phased seismic design and variable stiffness and displacement amplification(SDVD)has been developed,which can satisfy the stiffness and strength requirements of structures at different deformation stages.The damper mainly consists of sub-modules initial stiffness module(ISM)and variable stiffness module(VSM).Based on the construction of the damper,the working mechanism of the sub-modules and the whole damper was analyzed.The length and width of ISM and VSM were used as the parameters to design and fabricate the model specimens of the modules ISM,VSM,and SDVD as a whole,and the hysteresis performance of the submodules and the whole damper was investigated by pseudo-static test.The parameter influence law of the hysteresis performance of the damper was studied by finite element model(FEM).The results show that the damper exhibits flag-shaped hysteresis characteristics with tension-compression symmetry,as well as displacement amplification effect and variable stiffness characteristics.The hysteresis curves obtained from the FEM analysis of the damper match well with the results from the pseudo-static test through comparative analysis.The initial stiffness and strength of the SDVD are mainly provided by the ISM and increase with decreasing ISM fillet length.The post yielding stiffness and strength of the SDVD are mainly provided by the VSM and increase with decreasing VSM stopper width.关键词
自复位阻尼器/分阶段抗震/拟静力试验/位移放大效应/变刚度特性/滞回性能Key words
self-centering damper/phased seismic resistance/pseudo-static test/displacement amplification effect/variable stiffness/hysteretic performance分类
建筑与水利引用本文复制引用
董慧慧,杨智乐,杜修力,韩强..基于位移放大型变刚度自复位阻尼器的滞回性能研究[J].建筑结构学报,2024,45(8):180-191,12.基金项目
国家自然科学基金项目(52278475),北京市教育委员会项目(KM202210005020). （52278475）
