为研究损伤型钢混凝土(SRC)异形柱框架的抗震性能,对1榀两跨三层的框架模型进行拟动力试验,分析该结构在水平地震作用下的动力响应、滞回特性、刚度等性能。结果表明:损伤SRC异形柱框架再次遭受地震作用时,首先从损伤严重的部位开始破坏;滞回曲线较为饱满,具有一定的承载能力、耗能能力和抗倒塌能力;刚度较小,当地震作用不大时层间变形较大。损伤指标不大于0.8的SRC异形柱框架,能够承受8度基本烈度的地震作用而不发生倒塌。研究可为SRC异形柱框架的工程应用提供参考。
In order to investigate the seismic behaviors of damaged Steel Reinforced Concrete (SRC) frames with special-shaped columns, pseudo-dynamic test was conducted on a model of two-bay and three-story. The mechanical behaviors, such as dynamic response, hysteretic property and stiffness were analyzed. Test results show that when the damaged SRC frame with special-shaped columns experiences earthquake again, the damage starts at the heavily damaged position. The hysteretic loops are full, and the capacity of bearing, energy dissipation and collapse resistance are high. The stiffness is small, so that the story drift is large when the earthquake action is not strong. The damaged SRC frame with special-shaped columns, whose damaged index is not greater than 0.8, does not collapse under the 8 intensity intermediate action. This study can provide reference for the application of SRC frame with special-shaped columns in practical engineering.