RC框架空间夹心角节点的抗震性能研究  

Research on Seismic Capacity of Spatial Sandwich Corner Joints of Reinforced Concrete Frame

作　　者：张瑞云[1] 闫维明[1] 张加宾[1,2] 陈彦江[1] 侯立群[1] 齐越[1] 

机构地区：[1]北京工业大学,工程抗震与结构诊治北京市重点实验室,北京100124 [2]中铁建设集团有限公司,北京100131

出　　处：《工程抗震与加固改造》2015年第4期8-15,共8页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金项目(51378039,51421005)

摘　　要：设计了6个不同强度等级以及6个不同轴压比、剪压比的RC框架空间角节点的MARC有限元模型,在低周往复荷载作用下,对比分析传统角节点与夹心角节点抗震性能的差别;讨论梁柱混凝土相差几个等级时夹心节点可以代替传统节点;并探讨了轴压比、剪压比对夹心角节点抗震性能的影响。结果表明:当剪压比较低、轴压比较高时,梁柱混凝土强度相差6个等级时核心区可以采用梁的混凝土来浇筑;剪压比为中等较低时,随轴压比的增大,夹心角节点的抗震性能提高;当轴压比较低时,随剪压比的增大,其抗震性能降低。6 different strength grade concrete in the joints of beam and column and 6 sandwich joints with different axial stress ratio and shear-compression ratio are established by MSC. MARC. The differences of the seismic behavior between the traditional joints and sandwich joints are compared under the low period-recapitulate load. Discussion of several grades concrete between the beam and column is conducted when the sandwich joints can instead of the traditional joint,and the effect of axial stress ratio and the shearcompression ratio on the sandwich corner joints is studied. The results show that the joints can use the beams＇ concrete in 6 different strength grade concrete when the axial stress ratio is higher and the shear-compression ratio is lower. When the shear-compression ratio is middle or slightly low,the seismic capacity of spatial sandwich corner joints is improved by the increase of the axial stress ratio.When the axial stress ratio is lower,the seismic capacity is decreased by the increase of the shear-compression ratio.

关 键 词：RC框架 夹心节点 抗震性能 MARC 

分 类 号：TU375.4[建筑科学—结构工程]