(1 苏州中材建筑建材设计研究院有限公司，苏州215004； 2 中国建筑标准设计研究院，北京100048)

［摘要］计算预应力混凝土管桩轴心受压承载力时，应考虑预应力钢筋产生的混凝土残留预压应力影响，根据混凝土受压时应力-应变的关系式及混凝土有效预压应力与管桩配筋率的函数关系，推导出管桩达到受压极限时混凝土残留预压应力与混凝土初始预压应力的关系，并给出了预应力混凝土管桩轴心受压承载力的计算式。

［关键词］预应力混凝土管桩;轴心受压承载力;残留预压应力

中图分类号：TU473.1文献标识码：A文章编号：1002-848X(2011)02-0113-03

Bearing capacity calculation of prestressed concrete piles under axial compression

Wang Qing1, Chen Lei1, Kuang Hongjie1, Yu Benying2

(1 Suzhou Sinoma Architecture & Building Materials Design Research Institute Co., Ltd., Suzhou 215004, China；

2 China Institute of Building Standard Design & Research, Beijing 100048, China)

Abstract:Bearing capacity calculation of prestressed concrete pipes under axial compression should consider the influence of concrete residual compressive prestress produced by prestressed reinforcement. According to the relation between stress and strain of concrete under axial compression and the functional relation between concrete effective compressive prestress and reinforcement ratio of piles, relation between concrete residual compressive prestress and concrete initial compressive prestress were derived when piles reach ultimate limit state. And calculation formulas of bearing capacity of prestressed concrete pipes were given.

Keywords:prestressed concrete piles; axial compression bearing capacity; residual compressive prestress

作者简介：王清，教授级高级工程师，一级注册结构工程师，Email:wangking@163.com。

参考文献

［1］GB50010—2002混凝土结构设计规范［S］.北京：中国建筑工业出版社，2002.

［2］GB13476—2009 先张法预应力混凝土管桩［S］.北京：中国标准出版社,2009.

［3］10G409 预应力混凝土管桩［S］.北京：中国计划出版社，2010.