(1 河北工业大学土木工程学院， 天津 300401； 2 河北省土木工程技术研究中心， 天津 300401)

［摘要］为了研究预应力高强混凝土（PHC）管桩的抗震性能,对6个掺入钢丝端钩型钢纤维和剪切端钩型钢纤维的PHC管桩试件进行了低周往复加载试验,对各试件的承载能力、延性、滞回特性、耗能能力、累积损伤进行了分析,研究了不同改善措施对PHC管桩抗震性能的影响。研究结果表明: 掺入钢纤维能提高PHC管桩抗裂能力，随着钢纤维掺入量的提高，PHC管桩抗裂能力逐渐提高；掺入钢丝端钩型钢纤维比掺入剪切端钩型钢纤维提高PHC管桩抗震性能效果好；与其他改善措施相比，掺入钢丝端钩型钢纤维且加入非预应力筋的改善措施提高PHC管桩延性和耗能能力最明显，此PHC管桩的抗震性能效果最优。

［关键词］PHC管桩; 钢纤维; 反复荷载; 抗震性能; 延性

中图分类号：TU473.1        文献标识码：A        文章编号：1002-848X(2014)08-0010-05

Experimental study on seismic behavior of PHC pipe piles with steel fibers

Rong Xian1,2, Wang Xuyue1,2, Li Yanyan1,2

 (1 School of Civil Engineering, Hebei University of Technology, Tianjin 300401, China; 2 Civil Engineering Technology Research Center of Hebei Province, Tianjin 300401, China)

Abstract: The seismic behavior of the prestressed high concrete (PHC) pipe pile was tested through low cyclic loading tests of six different PHC pipe piles with wire end hook steel fiber and shear end hook steel fiber. The bearing capacity, ductility, hysteretic characteristics, energy dissipation capacity and accumulated damage were analyzed.The influence of different improvement measures on the seismic behavior of PHC pipe piles was studied. Results show that adding steel fiber has the ability to delay time of appearing the cracks for PHC pipe piles and to increase its ductility, and crack resistance of PHC pipe piles is improved gradually with the increase of steel fiber quantities. Adding wire end hook steel fiber improves the seismic behavior of PHC pipe piles better than adding shear end hook steel fiber. Compared with other improvement measures, the ductility and energy dissipation of PHC pipe piles are improved most obviously by adding wire end hook steel fiber and non prestressed steel bar, and the seismic behavior of PHC pipe piles with wire end hook steel fiber and non prestressed steel bar is the best.

Keywords: PHC pipe pile; steel fiber; cyclic loading; seismic behavior; ductility

作者简介：戎贤，教授，博士，Email:xrong516@126.com。

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