考虑粘结-滑移与剪切作用的钢筋混凝土柱侧向变形分析  

LATERAL DEFORMATIONS ANALYSIS OF REINFORCED CONCRETE COLUMNS INCOPARATING BOND-SLIP AND SHEAR EFFECTS

作　　者：朱绩超[1,2] 王响[3] 张勤[2] 

机构地区：[1]大连交通大学土木与安全工程学院,辽宁大连116028 [2]大连理工大学建设工程学部,辽宁大连116024 [3]美国加州大学圣地亚哥分校结构工程系

出　　处：《工程力学》2015年第7期128-135,共8页Engineering Mechanics

基　　金：数学地质四川省重点实验室开放基金项目(scsxdz201302)

摘　　要：钢筋混凝土柱在地震作用下发生弯剪破坏或剪切破坏,是结构丧失轴向承载能力甚至突然倒塌的重要原因。大量的试验研究显示钢筋混凝土柱总侧向变形由弯曲变形、粘结-滑移变形、剪切变形三种变形分量组成,这三种分量的共同作用决定了钢筋混凝土柱的受力变形反应。该文基于对构件变形分量研究,提出考虑粘结-滑移与剪切作用的钢筋混凝土柱侧向变形的宏单元模型。该模型模拟了静力反复荷载下的3个钢筋混凝土柱的试验模型,并对构件受力过程中各变形分量的变化以及各分量在总变形中的贡献进行了分析。结果表明该模型可以较准确的模拟水平荷载作用下剪切控制构件的受力变形反应全过程。Flexural-shear failure and shear failure of reinforced concrete （RC） columns under seismic loading are critical issues that may cause the loss of axial capacity and even collapse of a structure. Extensive experimental studies indicate that the lateral deformation of RC columns consists of deformations induced by flexural, bond-slip, and shear effects. The combined effects of the three components define the lateral load-deformation characteristics of RC columns. Based on the studies on each deformation component, the paper proposes a macro-element model incorporating bond-slip and shear effects into the numerical analysis of RC columns. The developed model is used to simulate three RC columns under reversed static cyclic loading and analyze the progression of deformation components as well as their contributions to the total deformation. Comparison of the numerical results and experimental results validate that the efficacy of the proposed model for the analysis of the progression of load-deformation behavior for shear-critical members under lateral loading.

关 键 词：钢筋混凝土柱 粘结-滑移 剪切作用 侧向变形 宏单元模型 

分 类 号：TU318[建筑科学—结构工程]