(1 五邑大学土木建筑学院，江门 529020； 2 广东七建集团管桩基础有限公司，江门 529000)

［摘要］介绍了预应力高强混凝土管桩受弯性能试验中的裂缝和挠曲变形等试验现象，对裂缝出现的位置、发生的形态和裂缝数量的变化规律及挠曲变形的变化规律进行了分析；对预应力高强混凝土管桩的受弯性能进行了初步总结，指出现行管桩规范关于构件开裂弯矩和极限承载力的计算方法有待改进，并提出了开裂弯矩和极限弯矩的修正建议计算表达式，计算结果与试验实测结果吻合较好。

［关键词］PHC管桩；受弯性能；裂缝；变形

Experimental research on the flexural behavior of prestressed high strength concrete pipe piles

Zeng Qingxiang¹, Liang Huanhua², Li Fayao², Xiao Zhilan¹, Zhu Zhenlin², Dong Qinghua¹(1 School of Civil Engineering and Architecture, Wuyi University, Jiangmen 529020, China；2 Pile Foundation Subsidiary of Guangdong No.7 Construction Group Ltd., Jiangmen 529000, China)

Abstract:The experimental phenomenon of the developing patterns on normal crack and flexural deformation of the prestressed high strength concrete (PHC) pipe pile specimens was introduced. The change laws of crack occurred position, crack developing, crack quantity and the flexural deformation were analyzed. The flexural behavior of PHC pipe piles were summarized. It is point out that the calculation methods on members cracking moment and ultimate bearing capacity of PHC pipe piles in code GB13476—2007 should be improved. A revised calculation formula for cracking moment and ultimate moment of PHC pipe piles is proposed.

Keywords:prestressed high strength concrete pipe pile; flexural behavior; crack; deformation

*江门市科技计划项目，建设部研究开发项目(06-K1-34)，广东省自然基金项目(07010874)，五邑大学科研项目。

作者简介：曾庆响，