基于半解析法的泵房结构平面和空间内力分析比较

Comparison Between Two Dimensional and Three Dimensional Internal Force Analysis of a Pump Station Based on Semi-analytical Method

为了避免地基范围这一影响因素,采用半无限地基上的半解析法对淮阴三站泵房结构分别进行二维、三维的内力计算,突出分析二者的差异.对底板、流道墩墙及检修间墙体等关键结构做详细对比,从弯矩的分布规律和数值两方面进行了整体、局部异同的对比分析.由数值分析结果可知,平面分析并不能考虑上下游挡墙对侧墙、底板顺河向的影响,流道处的墙体在顺水向是变厚度的,很难找到合理的代表面,对大型泵房结构进行三维有限元计算分析是必要的.

The two-dimensional and three-dimensional internal force analysis of Huaiyin Pump Station structure are carried out based on semi-analytical method of semi-infinite foundation for the sake of avoiding the influence of foundation-range; and their comparisons for the key structures such as floor, the frusta wall of flow passage and the wall of check repair room are made. Plane analysis can＇t consider the action of the upstream and downstream retaining wall to side wall. The thickness of flow passage wall is variable, it is difficult to find reasonable representatives section for analysis; we should adopt 3-D finite element analysis to compute the stucture of pump station.