中、英、美规范计算小尺寸桩(柱)波浪荷载的对比

Comparison of wave force of small-size pile calculated by Chinese,British and American specifications

为了研究中、英、美规范关于小尺寸桩(柱)的波浪荷载计算方法的异同点,针对港口工程中桩基结构的特点和实际项目中的波浪条件,通过不同的案例,对影响计算结果的各因素进行敏感性分析。结果表明,中、英、美规范中,计算小尺寸桩(柱)波浪荷载的基本原理相同,均采用Morison方程;3种规范计算结果的变化规律基本一致;波浪计算理论、惯性力系数CM的取值、海洋生物影响及群桩效应考虑与否,是导致计算结果存在差异的主要原因。

In order to study the differences of the calculation methods for the wave force of small-size pile provided in the Chinese,British and American specifications,in view of the characteristics of pile foundation structure in port engineering and the wave conditions in actual projects,we carry out sensitivity analysis of various factors affecting the calculation results through different cases.The results show that in Chinese, British and American specifications,the wave forces of the small-size piles are calculated all by the Morison equation,and the variation rules of the calculation results by three specifications are basically the same.The different wave theory,the value of inertia coeffecient CM,the marine growth and the group-piles effect are major reasons of calculation result difference.