中文摘要：

通过对3个小跨高比超高韧性水泥基复合材料连梁和1个钢筋混凝土连梁试件的低周反复加载试验,分析连梁试件的破坏形态、滞回性能和钢筋应变等性能,研究连梁跨高比变化对连梁抗震性能的影响。研究结果表明：小跨高比超高韧性水泥基复合材料连梁试件由于较好的韧性,有从脆性向延性转变的趋势,超高韧性水泥基复合材料连梁试件的滞回曲线呈反S形,比钢筋混凝土连梁试件的滞回曲线更为饱满,试件中各种钢筋能够达到屈服状态,超高韧性水泥基复合材料能改善连梁抗震性能,满足工程设计要求。

英文摘要：

According to the experimental investigation on the three small span-depth ratio ultrahigh toughness cementitious composite specimens and one RC coupling beam specimen under low cyclic reversed loading, the failure patterns and the mechanical behaviors of the coupling beam specimens such as load displacement hysteretic loops and strain of the steel were analyzed.It was also studied the effect of changing span-depth ratio of the specimens on seismic behavior of coupling beams.Test results indicated that the destroy mode of small span-depth ratio coupling beams due to their better toughness had the trend from brittleness to ductility; and the hysteretic loops of ultrahigh toughness cementitious composite coupling beam specimens showed a reversed S shape, but hysteretic loops were fuller than those of reinforced concrete coupling beam specimens.Steel bar yielded in the process of the test. Ultrahigh toughness cementitious composite can improve the seismic performance of coupling beams and meet the requirements of engineering design.