钢-混凝土组合柱变形能力及轴压比限值研究  

Study on deformation capacity and axial compression ratio limits of steel-concrete composite columns

作　　者：李莹辉 LI Yinghui(East China Architectural Design&Research Institute Co.,Ltd.,Shanghai 200041,China)

机构地区：[1]华东建筑设计研究院有限公司,上海200041

出　　处：《建筑结构》2020年第18期76-83,共8页Building Structure

基　　金：国家重点研发计划专项项目资助(2017YFC0703401)。

摘　　要：通过分析收集到的84根弯曲破坏型钢混凝土柱和96根矩形钢管混凝土柱的拟静力试验数据,得到了其极限位移角。分析了影响型钢混凝土柱与矩形钢管混凝土柱极限位移角的主要参数,拟合了两类柱子的极限位移角计算公式。基于钢-混凝土组合柱变形能力一致的原则,得到了型钢混凝土柱在不同轴压比下的最小配箍特征值要求以及不同抗震等级的矩形钢管混凝土柱的轴压比限值,为《组合结构设计规范》(JGJ 138—2016)的进一步修正提供参考。The quasi-static test data of 84 steel reinforced concrete(SRC)columns and 96 rectangular concrete-filled tube(RCFT)columns failing in flexural mode were collected,and the ultimate drifts of columns were obtained.The effects of design parameters on the ultimate drift were analyzed for SRC columns and RCFT columns respectively,and the calculation formulas for ultimate drift were derived by fitting.Based on the principle that the deformation capacity of steel-concrete composite columns is consistent,the minimum hoop characteristic value of SRC columns with different axial compression ratios and the axial compression ratio limit of RCFT columns were obtained.This study provides a reference for the further revision of Code for Design of Composite Structures(JGJ 138—2016).

关 键 词：轴压比 极限位移角 型钢混凝土柱 矩形钢管混凝土柱 配箍特征值 

分 类 号：TU398.7[建筑科学—结构工程]