圆沉箱墩式结构波浪作用相位分析

Analysis of wave action phase effect of circular caisson structure with pier

海港中墩式圆沉箱结构受波浪水平力及浮托力共同作用,其波浪荷载的结果对沉箱结构计算的影响较大。目前圆沉箱墩式结构波浪荷载作用均采用《港口与航道水文规范》公式进行计算,波浪作用的浮托力(力矩)零点相位有工程设计人员对规范认识不准确。文章结合工程实例,从墩式圆沉箱波浪正向水平力(力矩)和底板浮托力(力矩)不同的相位取值进行分析,提出了墩式圆沉箱结构合理的波浪受力工况,同时论证了同一波浪点作用位置,按小尺度墩(柱)计算水平总波浪力(力矩)与浮托力(力矩)相位存在的数值关系,为类似工程设计提供参考。

The circular caisson structure of harbor pier is affected by wave horizontal force and buoyancy force,and the result of wave load has great influence on the calculation of caisson structure.At present,wave load of circular caisson pier structure is calculated by the formula of Code of Hydrology for Harbour and Waterway,but the zero phase of buoyancy force(moment)of wave action is not clearly defined in the code,which leads to some errors in the understanding of engineering designers to the code.Based on the analysis of different phase values of positive horizontal force(moment)and buoyant force(moment)of pier circular caisson,the reasonable wave stress condition of pier circular caisson structure was proposed,and the action position of the same wave point was demonstrated.The numerical relationship between the horizontal total wave force(moment)and the phase of buoyancy force(moment)was calculated according to the small scale pier(column),providing reference for similar engineering design.