双排缀板连接的T形钢管混凝土异形柱抗震性能有限元分析  

Finite element analysis on seismic behavior of T-shaped concrete-filled steel tube columns with double nickelclad

作　　者：崔文彬[1] 刘素 Cui Wenbin;Liu Su(Shandong Provincial Key Laboratory of Ciwil 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：《建筑科学》2020年第5期89-95,共7页Building Science

基　　金：国家自然科学基金资助项目(51178259);山东省重点研发计划项目(2018GSF122006)。

摘　　要：本文提出了一种由方钢管混凝土小柱通过双排竖向缀板连接而成的T形方钢管混凝土组合异形柱,为研究该种组合异形柱的抗震性能,基于ABAQUS建立了20组T形异形柱的有限元模型,通过改变模型柱的加载方向、轴压比、混凝土强度及钢材强度,得出各模型柱的滞回曲线、骨架曲线及刚度退化曲线,并进行了延性与耗能分析。结果表明:较低的轴压比有利于承载力、延性及耗能的增加,但刚度降低;更高的混凝土强度有助于耗能能力的提升,但延性下降,承载力变化不大;当提高钢材强度时,承载力、延性及耗能均明显提升。In this paper,a kind of T-shaped square concrete-filled steel tube composite column is proposed,which is composed of a single column of concrete filled steel tube and two rows of vertical short steel plates. In order to study the seismic behavior of this column,20 finite element models of T-shaped columns are established based on ABAQUS. By changing the loading direction,axial compressive ratio,concrete and steel strength of the model columns,the hysteresis curve,envelop curve and stiffness degradation curve of the model columns are obtained,and the ductility and energy dissipation are analyzed. In conclusion,the lower axial compression ratio is beneficial to the increase of bearing capacity,ductility and energy consumption,but the stiffness decreases. The higher strength of concrete contributes to improve the energy dissipation capacity,but the ductility decreases and the bearing capacity changes a little bit. When the steel strength is increased,the bearing capacity,ductility and energy consumption are obviously improved.

关 键 词：ABAQUS 有限元分析 钢管混凝土异形柱 低周反复试验 抗震性能 

分 类 号：TU392.3[建筑科学—结构工程]