中空夹层钢管混凝土组合框架的拟动力试验  

Pseudo-dynamic test on CFDST composite frame

作　　者：黄亮[1,2] 郭磊 陆斐 卜逸凡 王静峰 HUANG Liang;GUO Lei;LU Fei;PU Yi-fan;WANG Jing-feng(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Key Laboratory of Civil Engineering Structures and Materials,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009 [2]土木工程结构与材料安徽省重点实验室,安徽合肥230009

出　　处：《振动工程学报》2022年第6期1501-1510,共10页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(52008145,51478158);中央高校基本科研业务费专项资金资助项目(JZ2020HGQA0203,PA2021GDSK0080)。

摘　　要：以高强单边螺栓连接的中空夹层钢管混凝土柱与型钢-混凝土组合梁是一种装配式框架组合结构。为了研究该组合结构在罕遇地震时的动力响应和局部构件的变形损伤,使用OpenSees软件和MTS液压伺服加载设备进行了多层框架拟动力试验,其中易于损伤的底部两层框架设置为试验子结构。具有水平随动能力的轴力加载是试验的技术难点之一,将省略轴力的简化边界和具备水平随动轴力的近似边界进行对比试验,结果表明:罕遇地震作用下,装配式框架的梁柱节点率先屈服,节点转动耗散了地震能量,从而避免梁端出现塑性铰;使用高强单边螺栓连接的梁柱节点属于半刚性连接,导致框架的层间位移角略大于抗震规范2%的限制;轴力略微有利于增加中空夹层钢管混凝土柱抗侧移刚度,省略轴力的试验加载方案是一种可接受的边界简化。The concrete-filled double skin steel tubular(CFDST)column and steel-concrete composite beam connected by high-strength blind bolt is a new assembly type frame composite structure.Applied the OpenSees software and MTS servo-hydraulic loading device,a multi-story frame pseudo-dynamic test is conducted for investigating the dynamic response evaluation of composite structure and deformation-failure detection of test specimen under a rare earthquake,where the vulnerable bottom two-story frame is assigned as test specimen.The axial force loading with horizontal follow-up capability is one of technical difficulties in the pseudo-dynamic test.The simplified boundary with omitted axial force and the approximate boundary with horizontal follow-up axial force are compared.The test results show that under the rare earthquake,the beam-column joint of composite frame will reach the bending collapse first.The joint rotation dissipates the seismic energy,thereby avoiding plastic hinge at the beam ends.Using the high-strength blind bolt,the beam-column joint belongs to semi-rigid joint,which results in a larger layer displacement angle of composite frame than the 2%restriction of the code for seismic design.The axial force is slightly beneficial to increase the horizontal stiffness of CFDST column,the loading scheme of omitting the axial force is an acceptable boundary simplification.

关 键 词：拟动力试验 中空夹层钢管混凝土 组合结构 OpenSees有限元 

分 类 号：TU317.2[建筑科学—结构工程] TU375