摘要
结合静载、低周往复及拟动力等历次环梁节点的试验结果,总结了环梁节点的破坏形态,提出了基于试件破坏面极限平衡的节点环梁承载力设计方法。该方法综合考虑了环梁环筋和箍筋的相互作用及框架梁、环梁截面尺寸的影响。利用三维有限元分析了在框架梁端弯矩作用下环梁的应力分布,比较了楼板的存在对环梁环向、径向以及竖向应力的影响,从而考虑楼板对环梁承载力的有利作用。在此基础上进一步提出了节点环梁实用的承载力计算公式,由框架梁梁端的配筋可直接求得环梁的配筋,极大地简化了设计计算工作。该计算公式与试验数据符合良好,可用于工程设计。
According to the testing results （etc. static loading,tow cyclic loading and pseudo-dynamic test）of RC beam-STCC column joint connected with ring beam in literature, failure patterns of ring beam were summarized, and designing method of the ring beam which was based on the ultimate balance of its destructive surface was proposed. The proposed method considered the interaction of ring reinforcement and stirrup of ring beam, as well as＇the effect of the frame beam size and the ring beam size. By 3 D finite element analysis, the distribution of the stress in the ring-beam under the moment effort from the frame-beam was analyzed. The influence to the stress in ring-beam due to the existence of the floor was found favorable. On the basis of the analysis, a practical design method for directly calculating reinforcement for the RC ring beam joint has been proposed, and was found to be in good agreement with the experiment data.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2008年第5期20-33,共14页
Journal of Building Structures
关键词
钢管混凝土柱
RC环梁节点
有限元分析
环梁破坏形态
楼板的有利作用
环梁承载力设计方法
STCC column
RC beam-STCC column joint connected with ring beam
FEA
ring beam destructive shape
positive effect of the floor
designing method of ring beam
