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（1 中國聯(lián)合工程公司，杭州 310022； 2 合肥工業(yè)大學土木建筑工程學院，合肥 230009）

［摘要］在地震作用下，預應力混凝土管樁樁頂受到水平剪力作用，而空心管樁的抗剪承載力通常比較弱。常在管樁上部埋入鋼筋，澆筑一段混凝土與承臺相連，以改善其抗剪性能。在試驗的基礎上對預應力管樁的抗剪承載力進行了研究，并對填芯混凝土在抗剪承載力中的作用進行了探討。研究表明，填芯混凝土提高了管樁抗剪承載力，改善了管樁脆性性能。為管樁抗剪承載力計算提供了試驗基礎及理論依據。

［關鍵詞］預應力混凝土管樁；填芯混凝土；抗剪承載力

Experimental study on shear capacity of connections between prestressed concrete pipe pile and pile cap

Zhang Xingyu1, Liu Bingkang2, Ling Yingxuan2, Sheng Hai1

(1 China United Engineering Corporation, Hangzhou 310022, China;

 2 School of Civil Engineering of Hefei University of Technology, Hefei 230009, China)

 

Abstract:Under horizontal earthquake action, the top of prestressed concrete pipe pile bears shear load, while the shear capacity of the hollow section pipe pile is usually not enough. It can embed reinforced bar and pour concrete in pile′s upper portion to make it combined with the platform, so the core concrete can improve shear performance of the pile. Experimental research has been done on shear capacity of prestressed concrete pipe pile and contribution of core concrete to shear capacity. The research showes that the core concrete increases shear capa

city and improve ductility of pipe pile. The experimental results and theoretical formula are proposed for designing and calculation of prestressed concrete pipe pile.

Keywords:prestressed concrete pipe pile; core concrete; shear capacity