预应力混凝土渡槽抗震性能的试验研究

基于预应力混凝土渡槽的低周反复荷载试验，对其受力过程、破坏形态、滞回曲线、刚度退化、耗能能力等抗震性能进行了研究与分析。试验结果表明：预应力混凝土渡槽的破坏形态为弯剪破坏，滞回曲线在加载的初期阶段表现出一定的捏拢效应，滞回曲线总体呈明显的梭形，且较为丰满，耗能能力强，抗震性能优良；配筋合适的预应力混凝土渡槽在加载初期对裂缝控制具有良好的表现，渡槽整体具有良好的延性；在整个加载过程中，渡槽试件的刚度退化明显，刚度退化主要集中在开裂后至屈服这一阶段。

Experimental studies of seismic behavior of prestressed contrete aqueduct

Based on experiments of prestressed concrete aqueduct under low reversed cychc loading, me ianure pattern ,loading procedure, hysteresis curves, ductility, rigidity degeneration and energy dissipation, etc, were studied systematically. Experinental results are shown that prestressed aqueduct failure pattern is bending-shear failure, and the hysteresis curves are hold together on some degree in the first stage, and it is like a shuttle as a whole, and it has good performance on crack control, and the whole aqueduct structure has good ductility and seismic performance. In all loading process,the rigidity degeneration is obvious and it is mainly in between crack and yield.