摘要
钢筋混凝土框架结构的震害主要集中在梁柱节点组合体区域。因此,建立合理的框架节点力学分析模型是准确模拟钢筋混凝土框架结构抗震性能的前提。早期的框架节点模型采用刚性节点假定,节点区域的塑性变形集中在梁端和柱端。20世纪90年代后,节点核心区的剪切变形和脆性破坏对整个框架结构体系的抗震性能及损伤发展的影响受到关注。相继提出了部分刚性节点模型和柔性节点模型。对框架节点的最新建模方法进行了总结。由于在不同的节点模型中,节点组合体的受力变形机制不同,采用的破坏假定也不同。对此进行了比较和阐述。最后,提出了现阶段框架节点模型研究需要解决的几个关键问题。
Most seismic damages of reinforced concrete （ RC ） frame appear in the area of beam-column joint subas- sembly. So, it is prerequisite to build a reasonable mechanical model of frame joint for correctly simulating the seis- mic performance of RC frame. After 1990s, the influence of shear deformation and brittle damage on seismic per- formance and damage development of whole frame system has been concerned. Partial stiff joint models and flexible joint models were put forward after that. The different mechanisms of force-deformation are applied in different joint models and the damage hypotheses in the models are different too. The main joint models are summarized and com- pared in the paper. At last, several key problems unresolved in the current research of RC frame joint are pro- posed.
出处
《世界地震工程》
CSCD
北大核心
2013年第3期75-82,共8页
World Earthquake Engineering
基金
2011上海大学研究生创新基金
关键词
钢筋混凝土框架
节点组合体
节点模型
抗震
reinforced concrete frame
joint assembly
joint model
anti-earthquake
