河南城建学院学报2025，Vol.34Issue(2)：34-43,51,11.DOI:10.14140/j.cnki.hncjxb.2025.02.005
L形实腹式SRC柱抗震性能试验及数值模拟研究
Research on seismic performance for solid-web steel reinforced concrete columns with L-shaped section by experiment and numerical simulation
摘要
Abstract
In order to study the seismic performance of steel reinforced concrete(SRC)column with L-shaped section under horizontal seismic action,unidirectional low cycle revised loading tests were conducted for three SRC L-shaped columns to investigate the effect of axial compression ratio and steel ratio on seismic perform-ance.Furthermore,a numerical analysis model was established by software Abaqus to research hysteresis per-formance under different forms of bidirectional loading paths.The results show that the failure mode exhibits typical bending failure and adhesive failure occurs in the later stage of loading.The specimens exhibit good en-ergy dissipation ability,and the average equivalent viscous damping coefficient corresponding to failure is 0.362.The larger the axial compression ratio,the faster the bearing capacity of the specimens decreases after the peak load.The ductility coefficients are all greater than 4,and the failure inter-story drift angle is ranges from 1/28 to 1/19,indicating that the specimens have excellent deformation ability.Compared with uniaxial loading conditions,double-limb steel members under biaxial loading exhibit accelerated and more extensive de-velopment of both stress and plastic deformation.The alternating overlap of tensile and compressive stress states in the section under coupled bi-axial loading results in redistribution of internal forces,leading to sudden load changes in the orthogonal direction of the column legs without displacement change.The biaxial compression bending coupling effect of irregular column sections under earthquake cannot be ignored and should be consid-ered in engineering seismic design.关键词
型钢混凝土/L形柱/抗震性能/数值模拟/双轴加载/耦合效应Key words
steel reinforced concrete/L-shaped column/seismic performance/numerical simulation/bi-axial loading/coupling effect分类
土木建筑引用本文复制引用
周超锋,朱言,郭亮,朱重澳..L形实腹式SRC柱抗震性能试验及数值模拟研究[J].河南城建学院学报,2025,34(2):34-43,51,11.基金项目
河南省教育厅高校重点科研项目(24A560006) （24A560006）
河南省粮油仓储建筑与安全重点实验室开放课题(2020KF-B06) （2020KF-B06）
