Investigation of the interior RC beam-column joints under monotonic antisymmetrical load

作     者：Fei GAO Zhiqiang TANG Biao HU Junbo CHEN Hongping ZHU Jian MA 

作者机构：School of Civil Engineering and MechanicsHuazhong University of Science and TechnologyWuhan 430074China Guangdong Provincial Key L aboratory of Durability for Marine Civil EngineeringShenzhen UniversityShenzhen 518060China Department of Civil and Environmental EngineeringThe Hong Kong Polytechnic UniversityHong Kong 999077China 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2019年第13卷第6期

页      面：1474-1494页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Key Research & Development Plan of China Key Interdiscipline Research Plan of Huazhong University of Science and Technology 

主　　题：RC beam-column joint reinforcement ratio in joint core axial compression ratio finite element test 

摘      要：The paper presents numerical findings of reinforced concrete interior beam-column joints under monotonic antisymmetrical *** finite element models considered compression and tension damage were calibrated by test results in terms of the load-displacement,failure modes,and strains of longitudinal *** emphasis was put on studying the effects of hoop reinforcement ratio in joint core and the axial compression ratio on the responses of the *** results show that,in addition to the truss and strut-and-tie mechanisms,the confinement mechanism also existed in the joint core.A certain amount of stirrup is not only able to enhance the confinement in joint core,undertake a part of shear force and thus to increase the shear capacity,prevent the outward buckling of steel bars in column,improve the stress distribution in joint core,delay cracking and restrain the propagation of cracks,but also to increase the yield load,decrease the yield displacement of beam and improve the joint ***,excessive horizontal stirrups contribute little to the joint *** a certain range,larger axial compression ratio is beneficial for the joint mechanical behavior,while it is negative when axial compression ratio is too large.