圆钢管型钢再生混凝土组合柱滞回性能非线性有限元分析  

Nonlinear finite element analysis of hysteretic behavior of steel reinforced recycled concrete filled circular steel tubular composite columns

作　　者：马辉[1] 张国恒 白恒宇 席嘉诚 赵艳丽 MA Hui;ZHANG Guoheng;BAI Hengyu;XI Jiacheng;ZHAO Yanli(School of Civil Engineering and Architecture,Xi'an University of Technology,710048 Xi'an,China;Research and Design Institute of Water Conservancy and Hydropower,Xi'an University of Technology,710048 Xi'an,China)

机构地区：[1]西安理工大学土木建筑工程学院,西安710048 [2]西安理工大学水利水电研究设计院,西安710048

出　　处：《应用力学学报》2024年第1期148-157,共10页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金资助项目(No.51408485);陕西省自然科学基础研究计划资助项目(No.2022JM-258);轨道交通基础设施性能监测与保障国家重点实验室开放课题资助项目(No.HJGZ2022105)。

摘　　要：基于圆钢管型钢再生混凝土组合柱低周反复荷载试验研究,采用OpenSees软件对该组合柱进行了滞回性能数值分析,获取了组合柱的滞回曲线及抗震性能指标,并与试验结果进行了比较,验证了组合柱数值模型的合理性。在此基础上,对组合柱的滞回性能开展了参数影响分析。结果表明:再生骨料取代率从0增大到100%,组合柱的峰值荷载下降了7.78%,延性略有降低;提高再生混凝土强度、型钢强度及圆钢管强度,对于提升组合柱的承载力及刚度是有利的,但却使组合柱的脆性增大;随着轴压比的增大,组合柱的承载力呈现先上升后下降的趋势,而延性逐渐变差;型钢配钢率从5.54%增至9.99%,组合柱的峰值荷载提高了24.34%,但对于改善组合柱的延性不明显;增大钢管壁厚对组合柱的承载力和延性均是有利的。Based on the cyclic load testing of steel reinforced recycled concrete filled circular steel tube columns,the hysteretic performance of composite columns was numerically analyzed by using OpenSees software,and the hysteretic curves and performance indexes of composite columns were obtained.Compared with the experimental results,the rationality of the numerical model of the composite column was verified.On this basis,the influence levels of parameters on the hysteretic performance of composite columns were analyzed.The results showed that the replacement rate of recycled aggregate increased from 0 to 100%,the peak load of composite columns decreased by 7.78%,and the ductility decreased slightly.Improving the strength of recycled concrete,section steel and circular steel tube was beneficial to improving the bearing capacity and stiffness of composite columns,but it also increased the brittleness of composite columns.With the growth of axial compression ratio,the bearing capacity of composite columns increased first and then decreased,and the ductility decreased gradually.The steel ratio of section steel rose from 5.54%to 9.99%,and the peak load of composite columns increased by 24.34%,but it did not obviously improve the ductility of composite columns.Increasing the wall thickness of steel tube was beneficial to the bearing capacity and ductility of composite columns.

关 键 词：钢管再生混凝土 型钢再生混凝土 组合柱 滞回性能 有限元分析 

分 类 号：TU528[建筑科学—建筑技术科学]