复杂地基对坞式船闸结构的影响研究

Study on effects of complex foundation on dock shiplock structure

为了解地基对坞式船闸结构的影响,依据某复杂地基坞式闸室结构,结合非线性有限元仿真分析方法,对比分析了原型复杂地基模型、均质地基模型和简化地基模型对闸室结构变形和内力分布的影响。分析表明,不同地基模型中地基与结构共同沉降变形方式的差别,影响了结构的变形及内力分布。复杂地基与均质地基模型两者的计算结果差别较大,说明地基因素是影响坞式结构变形和内力分布的重要原因。而简化地基与复杂地基模型两者的计算结果比较接近,说明对复杂地基模型如果处理得当,则结构数值计算工作既能反映地基对结构的影响,又能简化计算分析过程,取得事半功倍的效果。

A comparative analysis on the effects of complex foundation on dock shiplock structure was made by using nonlinear finite element simulations of three types of foundation, i.e. complex soil of prototype, homogeneous type, and simplified type, focusing on the deformation and stress distribution of the shiplock structure. The analysis shows the differences of these three models in the settlement of foundations and structures and their effects on deformation and internal force distribution. Significant differences between the models of complex foundation and homogeneous soils in calculation of deformation and stress, reveal the importance of foundation features. Similar results of the simplified model and complex soil model indicate that if a simplified model is reasonable, it can give good results and simplify calculation.