双缀板式L形钢管混凝土柱抗震性能研究  

Study on Seismic Behavior of L-shaped Concrete-Filled Steel Tubular Columns with Double Battens

作　　者：刘素 崔文彬[1] LIU Su;CUI Wenbin(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,青岛266590

出　　处：《结构工程师》2021年第1期67-74,共8页Structural Engineers

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：以一种由钢管混凝土端柱与双排竖向缀板连接而成的L形截面钢管混凝土组合柱为研究对象,利用ABAQUS软件建立简化模型,分析该新型组合异形柱的抗震性能。通过改变轴压比、钢材强度、混凝土强度以及缀板宽厚比参数,得出各模型柱在往复荷载作用下的滞回曲线、骨架曲线及刚度退化曲线,并进一步分析了各模型柱的延性与耗能能力。结果表明:提升钢材强度能有效提高承载力、延性及耗能能力;增大轴压比时,承载能力、延性、耗能均降低;混凝土强度对抗震性能影响不明显,随着混凝土强度的提升,承载力变化不大,延性略微下降;增大缀板宽厚比,承载力显著提高,初始刚度、延性及耗能增大,但刚度退化速度加快。In this paper,the L-shaped CFST composite column,which is composed of CFST end column and double row vertical battens,is taken as the research object.The simplified model is established by means of ABAQUS software to analyze the seismic performance of the new composite special-shaped column.By changing the parameters of axial compression ratio,steel strength,concrete strength and width thickness ratio of battens,the hysteretic curve,skeleton curve and stiffness degradation curve of each model column under reciprocating load are obtained,and the ductility and energy dissipation capacity of each model column are further analyzed.The results show that:Increasing the steel strength can effectively improve the bearing capacity,ductility and energy consumption capacity of this type structural member.When increasing the axial compression ratio,the bearing capacity,ductility and energy consumption are reduced.The influence of changing the concrete strength on the seismic performance is not obvious,with the increase of the concrete strength,the bearing capacity changes little,while the ductility slightly decreases.With the increase of the width thickness ratio of battens,the bearing capacity of battens is significantly increased,and the initial stiffness,ductility and energy consumption are also increased,but the degradation rate of stiffness is accelerated.

关 键 词：双排缀板 ABAQUS 简化模型 钢管混凝土异形柱 滞回性能 

分 类 号：TU398.9[建筑科学—结构工程] TU352.11