（九江学院土木工程与城市建设学院， 九江 332005）

［摘要］完成了3个小跨高比超高韧性水泥基复合材料连梁和1个普通钢筋混凝土连梁的低周反复加载试验，研究了连梁的破坏形态、滞回性能、耗能能力、刚度退化等性能，分析了连梁跨高比变化对其抗震性能的影响。研究结果表明，与普通钢筋混凝土连梁相比，小跨高比连梁的破坏形态有从脆性向塑性转变的趋势；超高韧性水泥基复合材料连梁的滞回曲线呈反S形，刚度退化较为明显，但较普通钢筋混凝土连梁的滞回曲线更为饱满，刚度退化趋势变缓；超高韧性水泥基复合材料连梁能改善连梁抗震工作性能，满足工程设计要求。

［关键词］超高韧性水泥基复合材料； 连梁； 拟静力试验； 抗震性能； 滞回曲线

中图分类号：TU599，TU323-3文献标识码：A文章编号：1002-848X(2016)15-0074-05

Experimental study on seismic performance of coupling beams with small  span-depth ratio and ultra high toughness engineered cementitious composite 

Yang Zhong

(College of Civil Engineering, Jiujiang University, Jiujiang 332005, China)

Abstract:Low cyclic loading tests on three coupling beams with small span-depth ratio and ultra high toughness engineered  cementitious composite  and an ordinary reinforced concrete coupling beam were conducted to study the performances of failure mode, hysteretic behavior, energy dissipation capacity and rigidity degeneration and analyze the effect of coupling beam′s span-depth ratio on the seismic performance. The results indicate that compared with the ordinary reinforced concrete coupling beam, failure mode of coupling beams with small span-depth ratio has the trend to transform from brittleness to plasticity. The hysteretic loop of coupling beams with ultra high toughness engineered  cementitious composite  features inverse S-shape with obvious rigidity degeneration. However, the hysteretic loop is fuller than that of ordinary reinforced concrete coupling beams and stiffness  degradation trend is slower. Coupling beams with ultra high toughness engineered   cementitious composite  can improve the seismic performance of coupling beams, and meet the requirements of engineering design.

Keywords:ultra high toughness engineered  cementitious composite; coupling beam; pseudo-static test; seismic performance; hysteretic loop

作者简介：杨忠，博士，讲师，Email：masyang@163.com。