Applications of Buckling Restrained Braces in Reinforced Concrete Frames

该方案由相邻楼层的防屈曲支撑组成，这些支撑共享同一个节点板，该节点板通过预应力螺栓固定在混凝土梁柱节点上，并由一对RC牛腿保持。通过试验测试，观察了防屈曲支撑节点和整个建筑的性能，并进行了分析。首先，通过组件试验来检验所提出的连续支撑框架系统连接的循环性能。结果证实了这种连接方法的有效性。其次，通过构件试验和有限元分析，研究了钢筋混凝土牛腿的抗剪承载力以及箍筋和混凝土的传力情况。此外，提出了一个拉压杆模型来估算深牛腿的抗剪强度。最后，对带防屈曲支撑的钢筋混凝土结构进行了地震反应分析，验证了防屈曲支撑的动力性能。

The proposal consists of BRBs in adjacent stories that share the same gusset plate, which is fastened to the concrete beam-to-column joint by prestressing bolts and is kept by a pair of RC corbels. The behavior of the BRB connection and the whole building was observed through an experimental test and followed by analysis. First, the cyclic performance of the connection of the proposed continuously braced frame system is examined through subassembly test. As a result, the effectiveness of this connection method was confirmed. Next, the shear strength of RC corbels and force transmission in stirrups and concrete are investigated by component test and finite-element analysis. In addition, a strut-and-tie model is proposed to estimate the shear strength of deep corbels. Finally, seismic response analysis of reinforced concrete building with BRBs was carried out and the dynamic performance wasconfirmed.