| 竖向荷载作用下PHC管桩水平承载力数值模拟 |
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| 引用本文： | 张国勋,肖朝昀,李圃.竖向荷载作用下PHC管桩水平承载力数值模拟[J].福建建设科技,2012(5):5-7,27. |
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| 作者姓名： | 张国勋 肖朝昀 李圃 |
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| 作者单位： | 1. 华侨大学土木工程学院,福建厦门,361021
2. 泉州市建设工程质量安全监督站,福建泉州,362000 |
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| 摘 要： | 竖向荷载对桩基水平承载力的影响较为复杂,目前确定桩基水平承载力通常不考虑竖向荷载的影响。采用数值模拟的方法研究竖向荷载对PHC管桩水平承载力的影响,混凝土采用弥散开裂模型,桩周土采用Mohr-Coulomb模型,并考虑了纵筋预应力的作用。模拟结果显示竖向荷载显著增大了单桩的水平临界荷载Hcr和开裂弯矩Mcr,同时增大了桩身位移。认为竖向荷载较大时应考虑其对单桩水平承载力影响。结论对桩基水平承载力的设计有一定指导意义。
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| 关 键 词： | PHC管桩 水平承载力 竖向荷载 数值模拟 弥散开裂模型 |
Numerical analysis of the influence of vertical load on horizontal bearing capacity of PHC pile |
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| Affiliation: | Zhang Guoxun et al |
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| Abstract: | Vertical load has a complex impact on the horizontal bearing capacity of pile foundation.At present,the horizontal bearing capacity is ascertained irrespective of the influence of vertical load.Finite element method is employed to research the influence of vertical load on horizontal bearing capacity of PHC pile in this paper.Concrete of pile body is simulated with smeared cracking model,surrounding soil with Mohr-Coulomb model,and the prestress of longitudinal bar is considered as well.It is shown that vertical load can improve the horizontal critical load and cracking moment,but increase the displacement of pile body simultaneously.The result could conduct the design of horizontal bearing capacity of pile foundation. |
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| Keywords: | PHC pile Horizontal bearing capacity Vertical load Numerical simulation Smeared cracking model |
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