高强钢筋(CRB550)在柱构件中的应用与推广

为了在柱构件中利用较小直径的高强钢筋替换较大直径的常用钢筋以达到节约钢材的目的,对比分析了CRB550钢筋作箍筋的钢筋混凝土柱构件和HPB235钢筋作箍筋的钢筋混凝土柱构件的各项性能指标.设计22根不同种类钢筋混凝土柱构件进行低周往复加载试验,结果表明,CRB550钢筋作箍筋的钢筋混凝土柱构件和HPB235钢筋作箍筋的钢筋混凝土柱构件在荷载-位移骨架曲线、钢筋应变、破坏形态、刚度退化和能量耗散等性能指标方面接近相同,证明了在柱构件中配置较小直径的高强钢筋替代较大直径的常用钢筋作箍筋这项新技术具有一定的可行性.

Application and popularization of CRB550 high strength steel bar in column members

In order to achieve the goal of saving steel through replacing the common steel bar with larger diameter by the high strength steel bar with smaller diameter, the various performance indexes of reinforced concrete （RC）column members with the stirrup of both CRB550 steel bar and HPB235 steel bar were compared and analyzed. The low cyclic loading tests for 22 different reinforced concrete column members with different types were designed. The results show that such performance indexes of RC column members with stirrup of both CRB550 steel bar and HPB235 steel bar as the load displacement skeleton curve, strain of steel bar, failure morphology, stiffness degradation and energy dissipation are close to the same. It proves that the new technology, namely replacing the common steel bar with larger diameter by the high strength steel bar with smaller diameter in the configuration of column members, has certain feasibility. 