带约束拉杆方形钢管混凝土短柱恢复力模型研究  

Research on the restoring force model of square concrete-filled tubular stub columns with binding bars

作　　者：王英涛[1] 蔡健[2] 龙跃凌[3] 陈庆军[2] 

机构地区：[1]华南理工大学土木与交通学院,广州510641 [2]华南理工大学亚热带建筑科学国家重点实验室,广州510641 [3]广东工业大学土木与交通工程学院,广州510006

出　　处：《建筑结构》2015年第20期34-39,共6页Building Structure

基　　金：国家自然科学基金项目(51008085);亚热带建筑科学国家重点实验室研究项目(2011ZC25;2013ZC14;2013ZC19);广州市珠江科技新星专项(2012J2200100);中央高校基本科研业务费专项资金资助(2014ZZ0026);中国博士后基金资助项目(2012M511810;2014T70807)

摘　　要：为研究带约束拉杆方形钢管混凝土短柱的恢复力特性,进行了2个不带约束拉杆和8个带约束拉杆方形钢管混凝土短柱试件在低周反复荷载作用下的试验研究。基于Open Sees纤维截面建立带约束拉杆方形钢管混凝土短柱的纤维模型,并对其滞回性能进行计算,数值分析结果与试验结果吻合较好,在模型得到验证的基础上,进一步考虑了轴压比、钢管壁厚、混凝土抗压强度、钢管屈服强度、约束拉杆间距、长细比等因素对骨架曲线的影响,基于分析结果,回归分析得出带约束拉杆方形钢管混凝土短柱的恢复力模型。结果表明:在研究参数范围内提出的恢复力模型与试验结果吻合较好。In order to study the restoring force characteristics of square concrete-filled tubular（ CFT） stub columns with binding bars,two square CFT stub columns without binding bars and eight square CFT stub columns with binding bars were carried out subjected to low constant compression and cyclic lateral load. The fiber model of the square CFT stub columns with binding bars was built based on the fiber section in Open Sees software,and the hysteretic behavior was calculated.The simulated hysteretic curves show good agreement with the experimental ones. Then,the influences of axial compression ratio,thickness of steel tube,concrete compressive strength,yield strength of steel tube,spacing of binding bars and slenderness ratio on the resilience model of skeleton curves were discussed. The restoring force model of square concretefilled tubular stub columns with binding bars was given based on the regression analysis. The results of hysteretic cures from the suggested model show good agreement with the experimental results.

关 键 词：方形钢管混凝土短柱 约束拉杆 恢复力模型 纤维模型 OpenSees软件 

分 类 号：TU317.1[建筑科学—结构工程] TU398.9