钢筋混凝土抗震框架节点传力机构分析

在总结国内外近年来大量研究成果的基础上，结合本文作者在节点试验研究中的体会，全面分析了框架节点中的传力特征，明确指出除斜压杆机构和桁架机构外还存在约束机构的这一事实。并讨论了这三种机构对节点核心区混凝土、箍筋、竖向钢筋的受力和对节点失效或破坏特征的影响。

Analysis on the Force-Transferring Mechanism of the Earthquake-Resistant Reinforced Concrete Frame Joints

On the basis of a summary of achievements from a large quantity of experimental studies both at home and abroad, in combination with the authors'experience in the experimental works on the reinforced concrete frame joints, their force-transferring characteristics are fully studied. The important fact that there is also a confined mechanism besides the inclined compressive strut and the truss mechanisms,is clearly pointed out. The influences of the three mechanisms upon the mechanical behaviors of the joint core concrete, the transverse and the vertical reinforcements,as well as upon the failure characteristics of the joint are also explored. Mechanical behaviors of the inclined concrete compressive strut and the factors causing its failure are specially discussed. These analyses provide theoretical bases for establishing more rational earthquake-resistant design criterion for reinforced concrete frame joints.