- 摘 要
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(1 河北工業(yè)大學土木工程學院， 天津 300401； 2 河北省土木工程技術研究中心， 天津 300401)
［摘要］為了研究預應力高強混凝土（PHC）管樁的抗震性能,對6個摻入鋼絲端鉤型鋼纖維和剪切端鉤型鋼纖維的PHC管樁試件進行了低周往復加載試驗,對各試件的承載能力、延性、滯回特性、耗能能力、累積損傷進行了分析,研究了不同改善措施對PHC管樁抗震性能的影響。研究結果表明: 摻入鋼纖維能提高PHC管樁抗裂能力，隨著鋼纖維摻入量的提高，PHC管樁抗裂能力逐漸提高；摻入鋼絲端鉤型鋼纖維比摻入剪切端鉤型鋼纖維提高PHC管樁抗震性能效果好；與其他改善措施相比，摻入鋼絲端鉤型鋼纖維且加入非預應力筋的改善措施提高PHC管樁延性和耗能能力最明顯，此PHC管樁的抗震性能效果最優(yōu)。
［關鍵詞］PHC管樁; 鋼纖維; 反復荷載; 抗震性能; 延性
中圖分類號：TU473.1 文獻標識碼：A 文章編號：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
作者簡介：戎賢，教授，博士，Email:xrong516@126.com。
參考文獻
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