钢-混凝土组合框架子结构动态倒塌性能试验研究  

Tests for dynamic collapse performance of steel-concrete composite frame substructures

作　　者：杨涛[1,2,3] 赵凯[1] 彭修宁 YANG Tao;ZHAO Kai;PENG Xiuning(College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;MOE Key Lab of Disaster Prevention and Structural Safety,Nanning 530004,China;Guangxi Xinfazhan Transportation Group Co.Ltd.,Nanning 530029,China)

机构地区：[1]广西大学土木建筑工程学院,南宁530004 [2]工程防灾与结构安全教育部重点实验室,南宁530004 [3]广西新发展交通集团有限公司,南宁530029

出　　处：《振动与冲击》2020年第13期36-42,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51568005,51868004);中国博士后科学基金项目(43XB3782XB)。

摘　　要：为了研究中柱失效后钢-混凝土组合框架结构的动态倒塌性能,对2个1/3缩尺的组合框架子结构试件进行了抽柱试验研究。研究结果表明:当在组合框架梁上分别悬挂30 kN和60 kN的配重时,2个试件在中柱处的最大动态位移至少为振动停止后静态位移的1.34倍;在中柱抽除后,剩余结构仍处于弹性受力阶段且阻尼比较小;采用栓钉抗剪连接件的组合框架梁具有较大的加速度响应和动态位移响应;组合梁中采用开孔板连接件的框架子结构具有较好的整体刚度,其受倒塌荷载动力冲击作用的影响相对较小;随着中柱竖向位移的增加,组合框架倒塌荷载动力增大系数(DIF)呈现两阶段的变化规律。基于试验研究,建立了组合框架倒塌荷载DIF的数学计算模型。该研究成果可为钢-混凝土组合框架结构的倒塌性能分析提供参考。To investigate dynamic collapse performance of a steel-concrete composite frame structure after a middle column failure,tests with a column removed were conducted on two 1/3 scaled specimens of composite frame substructures.Test results showed that when the additional weights of 30 kN and 60 kN are hung on a steel-concrete composite frame beam,respectively,the maximum dynamic displacements at its middle column are at least 1.34 times of the same position’s static displacements after vibration stopped,respectively;after the middle column is removed,the residual structure is still in elastic force-bearing stage and its damp ratio is smaller;the frame beam with stud anti-shear connectors has larger acceleration response and dynamic displacement one;the frame substructure with perforated plate connectors in composite beams has better integral rigidity and effects of collapse load’s dynamic impact action on it are relatively smaller;with increase in vertical displacement of the middle column,the collapse load’s DIF of composite frames reveals a two-stage varying law;the calculation model of the collapse load’s DIF of composite frames is built based on test investigation;the test results can provide a reference for collapse performance analysis of steel-concrete composite frame structures.

关 键 词：钢-混凝土组合梁 连续倒塌性能 动力响应 抗剪连接件 动力增大系数 

分 类 号：TU398.9[建筑科学—结构工程] TU317.1