复合受力下内藏钢桁架混凝土核心筒扭转性能试验

Experiment Study on Torsional Behavior of RC Composite Core Walls With Concealed Steel Truss Subjected to Combined Action

对2个1/6缩尺的核心简结构模型进行了偏心水平荷载作用下的低周反复荷载试验,一个为普通混凝土核心筒,另一个为内藏钢桁架混凝土组合核心筒.在试验基础上,对比分析了2个试件的抗扭承载力、扭转刚度、扭角延性、扭矩-扭角滞回特性、耗能能力以及破坏特征.试验研究表明,内藏钢桁架混凝土组合核心筒比普通混凝土核心筒抗扭能力显著提高.

In this paper, two 1/6 scale core walls including a normal reinforced concrete core wall and a reinforced concrete composite core wall with concealed steel truss were designed. The experimental study on the torsional behavior of two core walls subjected to eccentric horizontal Loading was carried out. The torsional capacity, torsional stiffness, torsional angle ductility, torsion-torsional hysteretic behavior, energy dissipation and failure mechanism of the core walls were discussed. The test results showed that the torsional performance of core walls was improved greatly by the concealed steel truss.