双同心圆内支撑方案研究与数值模拟分析

Research and Numerical Simulation Analysis of Double Concentric Inner Support Scheme

以宁波鄞州曼哈顿大厦项目为背景,通过非线性有限元模拟软件MIDAS/GTS建立三维模型,研究了内支撑变更前后2种方案的内力和变形对比分析。结果表明,双圆环内支撑较单圆环内撑控制位移效果更显著,减小幅度最大接近50%;双圆环内支撑体系具有结构受力合理、整体稳定性高、支撑刚度大等优点,能有效保障基坑安全。

Taking the Ningbo Yinzhou Manhattan Building project as the background,a three-dimensional model was established by using the nonlinear finite element simulation software MIDAS/GTS,and the internal force and deformation of the two schemes before and after the change of the internal support were studied.The results show that the displacement control effect of double ring internal brace is more significant than that of single ring internal brace,and the maximum reduction is close to 50%.The double-ring internal support system has the advantages of reasonable structural stress,high overall stability and large support stiffness,which can effectively ensure the safety of the foundation pit.