往复荷载作用下单桩P-Y曲线研究

Analysis of P-Y Curves of Single Pile under Lateral Reciprocating Loading

该文在大量试桩数据的基础上,分析了水平往复荷载作用下桩土作用机理,讨论了水平往复荷载作用下单桩的影响因素。文章推导了压缩系数与弹性模量、切线泊松比关系的公式,采用土壤常规参数绘制了水平静载单桩P-Y曲线,通过对水平静载、往复荷载单桩P-Y曲线的分析比较,提出了往复荷载折减系数的概念,绘制了往复荷载单桩P-Y曲线。实例分析表明,计算结果与实测值相吻合。

On the basis of a lot of test pile data,the article analyzes the pile-soil response mechanism and discusses the influence factors of single pile under the lateral reciprocating loading. In the article,the formula of the relationship of the compression coefficient and elastic modulus,tangent Poisson ratio was induced. The general parameters of soil are used to draw P-Y curves of single pile under lateral static loading. Through the analysis and comparison of P-Y curves of single pile under the lateral reciprocating loading and lateral static loading,the article puts forward the concept of reduction coefficient of reciprocating loading and draws the P-Y curves of single pile under lateral reciprocating loading. The practical experimental results show that the calculation result is identical with the measured value.