深埋式薄壁圆筒结构在滩海地基中的受力特性数值模拟

Numerical simulation of mechanical properties of embedded large-diameter cylinder structure in foreshore foundation

建立三维有限元模型,分析深埋式薄壁圆筒结构在施工工况和使用工况下的结构变形位移、内力分布、基底应力分布、结构-土体间土压力分布,并对比分析了有限元计算结果及规范法计算结果。结果表明,有限元法计算出来的土压力中下段分布呈现"凸肚子"形状,与结构实际受力状态更加接近,有限元计算边界点沉降小于中心点沉降,与分层总和法的计算结果基本一致。

A three-dimensional finite element is built to analyze the structure deformation performances, the internal force distribution, base stress distribution and earth pressure distribution between structure and soil. The finite calculation result and criterion calculation result are compared and analyzed. Results show that the finite calculation result of the earth pressure appears in the ＂convex curve＂, which is closer to the actual conditions, and the boundary settlement is less than the center settlement which is the same as that by the layer-wise summation method.