十字型ECC框架节点在循环荷载下的抗震性能分析  

Seismic Performance Analysis of Cross ECC Frame Joints Under Cyclic Load

作　　者：丁捷 周旭[1] 黄可 DING Jie;ZHOU Xu;HUANG Ke(Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650500

出　　处：《混凝土与水泥制品》2020年第12期68-72,共5页China Concrete and Cement Products

基　　金：昆明理工大学分析测试基金项目(2019M20182210038)。

摘　　要：通过选取典型的足尺试验模型,从其骨架曲线、荷载及位移等方面进行了ABAQUS验证,从而得出有限元计算的可靠性。基于此,进行了高轴压比(0.5、0.7、0.9)下十字型ECC框架节点在循环荷载下的抗震性能分析。结果表明:设计轴压比为0.9时框架节点易出现严重的节点核心区剪切破坏,耗能相比于0.5轴压比下降了约11.2%,出现严重的塑性变形;0.5轴压比下位移延性系数μ达到了5.37,所有试件μ均值达到了3.0以上,破坏模型均为延性破坏。The typical full-scale test models were selected and verified by ABAQUS software from the aspects of skeleton curve,load and displacement,so as to obtain the reliability of the finite element method.Based on this,the seismic behavior of ECC frame joints with high axial compression ratio(0.5,0.7,0.9)under cyclic load was analyzed.The results show that when the design axial compression ratio is 0.9,the frame joints are prone to serious shear failure in the core area,and the energy consumption is about 11.2%lower than that of the 0.5 axial compression ratio,which leads to serious plastic deformation.When the design axial compression ratio is 0.5,μreaches 5.37,and the averageμof all specimens reaches above 3.0,and the failure mode is ductile failure.

关 键 词：框架节点 轴压比 有限元 抗震性能 循环荷载 

分 类 号：TU375.4[建筑科学—结构工程]