钢纤维高强混凝土框架边节点梁的曲率延性  

Curvature ductility of steel fiber reinforced high-strength concrete side-joints in frames

作　　者：高丹盈[1] 赵柯岩[1] 王亮[1] 

机构地区：[1]郑州大学土木工程学院,河南郑州450002

出　　处：《世界地震工程》2009年第4期80-86,共7页World Earthquake Engineering

基　　金：国家自然科学基金项目(50678159)

摘　　要：进行了9个钢纤维高强混凝土框架边节点的抗震试验。通过测试钢纤维高强混凝土框架边节点梁端的荷载-变形滞回曲线和梁相关截面的横向变形,研究了钢纤维体积率、掺加范围和轴压比等因素对高强混凝土框架边节点梁截面曲率延性和滞回曲线的影响。结果表明,钢纤维能改善高强混凝土框架边节点梁截面延性,显著提高高强混凝土框架节点的抗震延性和耗能能力,对解决节点箍筋密集、改善施工条件具有明显效果。The seismic experiments of 9 steel fiber reinforced high-strength concrete frame joints have been conducted. The influence of steel fiber volume ratio, the range of steel fiber added in the joints and axial compression ratio on the beam sectional curvature ductility and hysteretic curve of the steel fiber reinforced high-strength concrete frame joints are investigated through measuring the load-deflection hysteretic curve on the beam end and the transverse deformation of the beam sections near column. It shows that the steel fiber has better effects on improving the seismic ductility of the beam section, the ductility and the energy dissipation capacity of high-strength concrete frame joints, and also is an efficient way to solve the problem of more stirrups crowded in the joints and to improve the working condition in construction.

关 键 词：框架节点 钢纤维 高强混凝土 梁截面 曲率延性 平均曲率 耗能能力 

分 类 号：TU37[建筑科学—结构工程] P315.97[天文地球—地震学]