斜向蜂窝加劲肋T形钢管混凝土柱地震作用下的有限元分析  

Finite element analysis of diagonal honeycomb stiffener T-shaped concrete-filled steel tube column under earthquake

作　　者：路倩倩 赵澄 李云峰[1] Lu Qian-qian;Zhao Cheng;Li Yun-feng(Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学,山东省土木工程防灾减灾重点实验室,山东青岛266590

出　　处：《工程抗震与加固改造》2022年第1期42-48,共7页Earthquake Resistant Engineering and Retrofitting

摘　　要：提出一种斜向蜂窝加劲肋T形钢管混凝土柱,通过改变蜂窝加劲肋截面布置方式、加载方向、钢材强度和混凝土强度,研究变量对于试件抗震性能的影响。运用有限元软件,进行不同变量下的抗震性能研究,并与试验进行对比。得出结论:斜向蜂窝加劲肋T形钢管混凝土柱在初始循环阶段,应力由混凝土承担,刚度退化明显;荷载持续循环,试件进入塑性变形,刚度退化放缓。在不对称截面方向加载时,试件抗震能力降低,蜂窝加劲肋斜向放置可以改善试件的抗震性能。In this paper,a T-shaped concrete-filled steel tube column with diagonal honeycomb stiffeners is proposed.By changing the layout of honeycomb stiffeners,the loading direction,steel strength and concrete strength,the influence of variables on the seismic performance of specimens is studied.Using finite element software,the seismic performance under different variables is studied and compare with the test.It is concluded that in the initial cycle of the diagonal honeycomb stiffener T-shaped steel tube concrete column,the stress is borne by the concrete,and the stiffness degradation is obvious;the load continues to circulate,the specimen enters plastic deformation,and the stiffness degradation slows down.When loading in the direction of asymmetrical section,the seismic resistance of the specimen is reduced,and the diagonal placement of honeycomb stiffeners can improve the seismic performance of the specimen.

关 键 词：T形钢管混凝土柱 蜂窝加劲肋 抗震性能 刚度退化 

分 类 号：TU392.3[建筑科学—结构工程]