SRC柱纤维单元塑性铰长度的计算分析  

Calculation and Analysis of Plastic Hinge Length of SRC Column Fiber Element

作　　者：刘中欢 吴梓楠 LIU Zhonghuan;WU Zinan(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学土木与交通学院,广州510640

出　　处：《河南科学》2021年第6期971-977,共7页Henan Science

基　　金：广东省自然科学基金项目(2020A1515010739)。

摘　　要：为解决柔度法纤维单元的塑性局部化问题,基于44个型钢混凝土柱试验数据,回归了基于柔度法纤维单元的塑性铰长度计算公式,并基于回归公式探究了轴压系数、体积配箍率和含钢率对型钢混凝土柱延性的影响.分析结果表明:轴压系数是影响型钢混凝土柱延性的关键因素,其延性系数随轴压系数的升高而降低;型钢混凝土柱的延性系数随体积配箍率的增加而增大;含钢率对其延性则基本没有影响.In order to solve the problem of plastic localization of fiber element in flexibility method,based on the test data of 44 steel reinforced concrete columns,the calculation formula of the plastic hinge length based on the flexibility method fiber element is regressed.Based on the regression formula,the influence of axial compression coefficient,volumetric hoop ratio and steel ratio on the ductility of steel reinforced concrete(SRC)columns are explored.The analysis results show that the axial compression coefficient is a key factor affecting the ductility of steel reinforced concrete columns,and its ductility coefficient decreases with the increase of axial compression coefficient.The ductility coefficient of steel reinforced concrete columns increases with the increase of volumetric hoop ratio,while steel ratio has little effect on its ductility.

关 键 词：型钢混凝土柱 纤维单元 塑性铰长度 延性系数 

分 类 号：TU375.3[建筑科学—结构工程] TU313.2