PHC桩在偏心荷载(横向位移)作用下的分析

Analysis on Eccentric Loaded Pretension Concret Pipe Pile

本文根据材料力学原理和现行钢筋混凝土规范的规定,分析预应力混凝土管桩在偏心荷载作用下的内力和偏心距、偏心距与承载力的关系,以及偏心距的临界值等等,并对现行的预应力混凝土管桩规范谈谈个人的见解。分析结果表明:偏心承载明显地降低了桩的容许承载力,而且,桩在正常使用极限状态下所能容许的偏心距非常有限,这些特征应在预应力混凝土管桩的应用中慎重考虑。本文的分析方法可用于已产生横向位移桩的受力分析。

Based on the principle of material mechanics and the regulation of current specification of reinforced concrete structure, the allowable bearing capacity of PHC pipe pile under eccentric load, the critical loading eccentricity, and the relationship between bearing capacity and loading eccentricity are analyzed in this paper. The comments on current specification of PHC pipe pile are also presented. The results of analysis show that eccentric loading decreases bearing capacity of the pile significantly. Besides, the allowable eccentricity is very limit for pretension concrete pipe pile under the ultimate state of normal working condition. This character must be taken into account carefully in the application of pretension concrete pipe pile. The method presented herein can be used to analyze the laterally deformed piles,