基于拉断的Mohr–Coulomb破坏准则的钢筋混凝土框架柱倒塌失效模式研究  

STUDY OF COLLAPSE FAILURE MODES OF REINFORCED CONCRETE FRAME COLUMNS BASED ON MOHR–COULOMB CRITERION WITH TENSION-CUTOFF

作　　者：吴楷文 罗嗣海[1] 周旭光 查支祥 WU Kaiwen;LUO Sihai;ZHOU Xuguang;ZHA Zhixiang(School of Civil Engineering and Surveying and Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;Zhejiang Second Construction Group Limited Company,Ningbo 315000,Zhejiang,China;School of Civil Engineering and Architecture,Ningbo Tech University,Ningbo 315000,Zhejiang,China)

机构地区：[1]江西理工大学土木与测绘工程学院,江西赣州341000 [2]浙江省二建建设集团有限公司,浙江宁波315000 [3]浙大宁波理工学院土木建筑工程学院,浙江宁波315000

出　　处：《力学与实践》2021年第3期360-370,共11页Mechanics in Engineering

基　　金：浙江省建设厅科研项目(2018K103);浙江省自然科学基金项目(LQ19E080008)资助。

摘　　要：为研究钢筋混凝土框架柱塑性铰区的具体破坏形式,本文基于拉断的Mohr–Coulomb破坏准则提出了水平与竖向载荷共同作用下钢筋混凝土框架柱的五种倒塌失效模式,通过高宽比、轴压比等结构参数作为主要影响因素推导、界定了其中三种典型失效模式的发生条件、分布情况,并得知失效模式b是钢筋混凝土框架柱最常见的倒塌失效模式,最后通过文献试验结果验证了上述理论成果,为地震作用下钢筋混凝土框架柱侧移计算以及抗倒塌设计提供进一步的理论基础。In order to study the specific damage forms of reinforced concrete(RC)frame columns in the plastic hinge zone,this paper proposes five collapse failure modes of RC frame columns under horizontal and vertical loads based on Mohr–Coulomb criterion with tension-cutoff.Then the critical conditions and the distribution of three typical collapse failure modes of RC columns among the five modes are derived and determined by structural parameters like the height width ratio and the axial compression ratio as the main influence factors,and it is shown that the mode b is the most common collapse failure mode of the RC frame columns.Some experimental results in literature are used to verify the above theoretical conclusions,which will provide a theoretical basis for the lateral displacement calculation of the RC frame columns under the earthquake action and for the anti-collapse design.

关 键 词：拉断的Mohr–Coulomb破坏准则 钢筋混凝土框架柱 倒塌失效模式 判别条件 

分 类 号：TU13[建筑科学—建筑理论] TU375.3