预应力高强混凝土管桩滞回性能的试验研究

Experimental research on hysteretic behavior of prestressed high strength concrete pipe piles

通过对5根预应力高强混凝土管桩试件进行低周往复加载试验,分析试件的破坏特征、滞回特性、刚度退化、骨架曲线、承载力、位移及延性等指标,研究钢纤维混凝土及配箍率的参数变化对预应力高强混凝土管桩的滞回性能的影响.研究结果表明:在预应力高强混凝土管桩中掺入钢纤维能够改善试件的滞回特性,提高试件的极限承载能力.增加预应力高强混凝土管桩试件的配箍率可以提高试件的变形能力.

Five prestressed high strength concrete pipe piles were tested under low cyclic loading.The result of failure characteristic,hysteretic characteristic,rigidity degradation,skeleton curve,bearing capacity,displacement and ductility was analyzed.Those effects on hysteretic behavior of prestressed high strength concrete pipe piles were analyzed such as the steel fiber and stirrup ratios.The results show that the hysteretic characteristic of prestressed high strength concrete pipe piles reinforced by fiber is improved.The bearing capacity of prestressed high strength concrete pipe piles reinforced by steel fiber is enhanced.The deformation capacity of specimens increases with the increase of stirrup ratio.