钢筋混凝土框架顶层边节点在低周交变荷载下的受力性能初探

TENTATIVE INVESTIGATION OF THE BEHAVIOR OF REINFORCED CONCRETE FRAME CORNER JOINTS UNDER LOW CYCLE LOADING

本文通过四个具有不同配筋构造特点的足尺试件对钢筋混凝土框架顶层边节点梁柱组合件的单向低周交变性能进行了探索性试验,从中了解了在交替加大正负弯曲变形的过程中各组合件的损坏发展过程及破坏特征,以及强度、刚度、延性和耗能性的变化规律。通过对比各项性能对其抗震性能作了初步评价。此外,还对梁、柱主筋在节点内的应变分布和节点箍筋受力状态的实测结果作了分析。

In this pager, four full-scale corner joint assemblies of reinforced concrete frame beam and column with different detail structure are tested under low cycle loading, The process of damage development and the characteristics of break of the assemblies in the course of alternately increasing positive and negative bending deformation are learned Strength, stiffness and ductility of assemblies and the various regulations of energy consumption are also studied. Compared with these properties, the anti-seismic behavior is tentatively commented. Besides, the test results of the strain distribution of beam and column longitudinal bars and stress state of joint stirrups are analyzed.