钢筋混凝土框架结构层间变形与构件局部变形关系的试验研究  

Experimental Study of Relationship between Inter-story Drift and Local Deformation of Structural Member for RC Frame Structure

作　　者：蒋欢军[1,2] 范光召 刘许凡 

机构地区：[1]同济大学结构工程与防灾研究所,上海200092 [2]同济大学土木工程防灾国家重点实验室,上海200092 [3]福建电力勘测设计院,福州350003

出　　处：《结构工程师》2014年第3期144-150,214,共7页Structural Engineers

摘　　要：将柱端弯矩增大系数、轴压比和梁剪跨比作为设计参数设计了9个1/2比例的钢筋混凝土框架节点,进行了低周反复荷载试验,研究了构件的破坏形式、各种构件的局部变形对层间位移的贡献。研究表明,结构的层间变形与构件局部变形的关系与试件的破坏形式有关。对于发生梁端弯曲破坏的试件,节点剪切变形引起的层间变形很小,在进行框架结构的弹塑性地震反应分析时,可近似忽略节点区的剪切变形;对于发生梁端弯曲破坏—节点剪切破坏或柱端弯曲破坏—节点剪切破坏的试件,在构件进入屈服状态后,节点的剪切变形引起的层间位移较大,在进行框架结构的弹塑性地震反应分析时,不能忽略节点剪切变形的影响。In this study,nine half-scale reinforced concrete （RC）beam-column sub-assemblages extracted from a moment-resisting frame structure were tested under cyclic loading to study the relationship between the global de-formation and the local deformation.The main design parameters of the tests are the amplification coefficient of col-umn moment,the axial compression ratio,and the shear-span ratio of beam.The study indicates the relationship between the inter-story drift and the local deformation of structural member is related with the damage pattern of the specimen.For the specimens with the flexural failure of beam ends,the inter-story drift caused by the shear de-formation of the joint is very small so that the shear deformation of the joint could be omitted during the elasto-plas-tic earthquake response analysis of frame structures.For the specimens with the flexural failure of the beam or col-umn ends and the shear failure of the joint,the inter-story drift caused by the shear deformation of the joint is sig-nificant so that the shear deformation of the joint could not be omitted during the elasto-plastic earthquake response analysis of frame structures.

关 键 词：钢筋混凝土框架 层间位移 构件变形 框架节点 低周反复荷载试验 

分 类 号：TU375.4[建筑科学—结构工程]