PHC管桩的开裂弯矩和极限弯矩计算

曾庆响; 梁焕华; 肖芝兰; 李法尧

doi:10.13204/j.gyjz201001018

PHC管桩的开裂弯矩和极限弯矩计算

doi: 10.13204/j.gyjz201001018

1.
1. 五邑大学土木工程系,广东江门529020;
2.
2. 广东第七建筑集团管桩基础有限公司,广东江门529000;
3.
3. 华南理工大学亚热带建筑科学国家重点实验室,广州510640

基金项目:

建设部研究开发项目(06-K1-34);广东省自然科学基金资助项目(07010874);江门市科技计划项目;五邑大学科研项目

详细信息

作者简介:
曾庆响,男,1968年出生,硕士,副教授. E-mail:zqx20086@163.com

中图分类号: TU753.3
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- 被引次数: 0
出版历程
- 收稿日期: 2009-08-20
- 刊出日期: 2010-01-20

CALCULATION METHODS OF CRACKING MOMENT AND ULTIMATE FAILURE MOMENT OF PRESTRESSED HIGH STRENGTH CONCRETE PIPE PILES

1.
1. Department of Civil Engineering,Wuyi University,Jiangmen 529020,China;
2.
2. Pile Foundation Subsidiary of Guangdong No.7 Construction Group Ltd,Jiangmen 529020,China;
3.
3. State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,China

摘要

摘要: 预应力高强混凝土(PHC)管桩的受弯性能是管桩产品合格与否的重要指标。目前PHC管桩的开裂弯矩和极限弯矩的计算通常都是按照GB500102002《混凝土结构设计规范》中的方法进行的。但PHC管桩的混凝土强度已经超出了规范的适用范围,计算结果并不能真实反映PHC管桩的实际承载能力。结合试验测试结果,根据PHC管桩的离心成型生产工艺和高强度的特点,提出对现有PHC管桩抗裂弯矩和极限弯矩计算方法的修正建议。验算结果表明,采用修正方法计算所得的PHC管桩开裂弯矩和极限弯矩与试验实测值吻合良好。
- PHC管桩 /
- 开裂弯矩 /
- 极限弯矩 /
- 计算方法
Abstract: Flexural behavior is one of the most important qualifying index of prestressed high strength concrete (PHC) pipe pile.The calculation methods of cracking moment and ultimate failure moment of PHC pipe piles are based on the approaches in the Code for Design of Concrete Structures (GB 500102002) at present.In fact,the concrete strength grade of PHC pipe piles are beyond the adaptable scope of the GB 500102002 Code.The approaches in the code for estimating the cracking moments and ultimate failure moments of PHC pipe piles can not well match the actual bearing capacities.In this paper,combining with the analysis of the flexural experimental results and the behavior of centrifugal shaped producing method of PHC pipe piles,new approaches for calculating the cracking moment and ultimate failure moment of PHC pipe piles are proposed based on the present methods in the code.Comparing analysis shows that the calculation results by the modified methods are well agreed with the experimental results of PHC pipe piles.The suggested approaches for estimating the flexural capacities of PHC pipe piles are suitable in practice design.
- PHC pipe piles /
- cracking moment /
- ultimate failure moment /
- calculation method