强梁弱柱型钢管混凝土柱-钢梁节点抗震性能研究  

The Study of the Seismic Performance of the Strong-Beam and Weak-Column Shaped Joints of Concrete-Filled Steel Tubular Column and Steel Beams

作　　者：徐培蓁[1] 张志鹏 高代明 朱亚光[1] XU Peizhen;ZHANG Zhipeng;GAO Daiming;ZHU Yaguang(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China;Qingdao Tengyuan Design Institute Co.,Ltd.,Qingdao 266071,China)

机构地区：[1]青岛理工大学土木工程学院,青岛266033 [2]青岛腾远设计事务所有限公司,青岛266071

出　　处：《结构工程师》2021年第1期134-143,共10页Structural Engineers

基　　金：国家自然科学基金资助项目(51578342)。

摘　　要：以柱梁强度比为控制指标,设计了5个强梁弱柱型方钢管混凝土柱-H型钢梁节点,对其进行低周反复荷载试验,考察轴压比、含钢率及节点形式对该类节点抗震性能的影响。结果表明:各试件均在柱端出现塑性铰,极限柱转角均值介于1/34~1/18之间,抗倒塌能力强;边柱节点易发生焊缝破坏,中柱节点的抗震性能优于边柱节点;含钢率越大,轴压比越小,滞回曲线越饱满,承载力退化与刚度退化越慢,延性性能与耗能能力越好;轴压比对抗震性能的影响比含钢率的影响更明显;用我国规范和规程规定的方法验算了方钢管混凝土柱的试验承载力,规范和规程的计算结果偏于安全;对规程的压弯构件承载力计算公式进行了修正,可为规程的修订提供参考。Taken the column beam strength ratio as control index,five strong-beam and weak-column concretefilled steel tubular columns and H-shaped steel beam shaped joints were designed.The low-cyclic loading tests were carried out.The effects of axial compression ratio,steel ratio and joint type on the seismic performance were analyzed.The results showed that the plastic hinge appears at the end of the column of every joint,and the average limit column angle is between 1/34 and 1/18,the capability of anti-collapse is strong.The weld damage is likely to occur in the exterior column joints,and the seismic performance of the interior column joints is superior to that of the exterior column joints.The larger the steel ratio,the smaller the axial compression ratio,the fuller the hysteresis curve,and the slower the strength and stiffness degradation is,the better the ductility performance and the energy dissipation capacity will be.The influence of the axial compression ratio on seismic performance is more obvious than that of the steel ratio.The bearing capacity of concrete filled square steel tubular columns were checked by the method prescribed in Chinese code and specification,and the calculation results of code and specification are prone to safe.The formula for calculating the bearing capacity of compression-bending members in the specification is revised,which can provide reference for the revision of the specification.

关 键 词：钢管混凝土柱-钢梁节点 低周反复荷载试验 抗震性能 强梁弱柱 承载力退化 

分 类 号：TU398.9[建筑科学—结构工程] TU352.11