湖南大学学报（自然科学版）2024，Vol.51Issue(7)：83-94,12.DOI:10.16339/j.cnki.hdxbzkb.2024070
碟簧-钢绞线组合自复位防屈曲支撑滞回性能
Hysteretic Performance of Disc Spring-Steel Tendon Self-centering Buckling-restrained Brace
摘要
Abstract
The self-centering buckling-restrained brace combined both disc springs and steel tendons(DT-SCB)was proposed to solve the shortage problem of the deformation ability of the traditional self-centering buckling-restrained brace(SCBRB).The steel tendons in series with combination disc springs are used to provide the self-centering force,and two parallel flat steel cores are responsible for dissipating seismic energy.The detailed configuration,working mechanism at different stages,and restoring force model of DT-SCB were introduced in this study.The finite element model was established,through which the effect of self-centering ratio αsc,the ratio of steel tendons and combination disc springs K1 and the ratio of self-centering unit and energy dissipation system K2 on the hysteretic behavior,self-centering level and energy dissipation capacity of DT-SCB were conducted,respectively.The results indicated that the proposed DT-SCB restoring force model agreed well with that from numerical simulation.No obvious failure characteristics were observed even if the maximum loading displacement(corresponding to the axial strain of 2.5%)was achieved.The hysteretic curve of DT-SCB was flag-shaped,with stable energy dissipation.The deformation ability of proposed DT-SCB was significantly greater than that of the conventional SCBRB with steel tendons.The maximum residual displacement sharply decreased with the increasing self-centering ratio,while the greater K1 weakened the control effect of αsc on residual deformation.The disc springs were prematurely flattened with an excessive ratio of self-centering system and energy dissipation system(K1≥2.0),which would reduce the deformation capacity of DT-SCB.The stiffness ratio K2 had a significant influence on the energy dissipation capacity of DT-SCB,and the equivalent viscous damper ratio of DT-SCB decreased with the increase of the stiffness ratio K2.The nonlinear dynamic analysis results of the braced frame subjected to severe earthquakes showed that DT-SCB can effectively reduce the maximum and residual inter-story drifts and improve the seismic performance of the frame.关键词
自复位防屈曲支撑/碟簧/钢绞线/数值模拟/滞回性能Key words
self-centering buckling-restrained brace/disc spring/steel tendon/numerical simulation/hyster-etic behavior分类
建筑与水利引用本文复制引用
鲁军凯,戴首昆,许国山,李文鹏,李金平,李毅飞,许兴哲..碟簧-钢绞线组合自复位防屈曲支撑滞回性能[J].湖南大学学报（自然科学版）,2024,51(7):83-94,12.基金项目
国家自然科学基金资助项目(51978213,51908108),National Natural Science Foundation of China(51978213,51908108) （51978213,51908108）
黑龙江省自然科学基金资助项目(LH2022E005),Natural Science Foundation of Heilongjiang Province(LH2022E005) （LH2022E005）
国家大学生创新创业训练计划项目(20220225273),National College Students Innovation and Entrepreneurship Training Program(20220225273) （20220225273）
