砂井地基固结三维非线性有限元及材料参数反演分析  

3D nonlinear FEM analysis of consolidation for soft soil roadbed and back analysis of material parameters

作　　者：曾连灯[1,2] 刘国明[1] 

机构地区：[1]福州大学土木工程学院,福建福州350108 [2]晋江水利局,福建晋江362200

出　　处：《福州大学学报（自然科学版）》2010年第1期127-134,共8页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省自然科学基金资助项目(2008J0154);福建省教育厅省属高校专项课题资助项目(2006F5002)

摘　　要：引入一种新型排水板单元,将其结合到三维Biot固结有限元程序中,简化了砂井地基三维有限元模拟和计算工作量.同时,将三维非线性Biot固结有限元法与基于改进遗传算法的材料参数反演分析方法相结合,编制了能够进行砂井地基正演和反演计算的数值模拟程序,用于堆载预压下砂井路基固结变形的工程模拟.反演结果与实测吻合良好.A new element type,named PVD element,is introduced and combined with 3D Biot FEM program in this paper,which makes the calculation work of 3D FEA of sand drain foundation reduced enormously.Moreover,back analysis of material parameters based on improved genetic algorithms is combined with 3D Biot FEM program,then the forward and inversion program is worked out and applied to an engineering project to analyze the subsidence of a soft foundation preloaded by embankment.The results calculated by the program were very close to the measured results.

关 键 词：砂井地基 排水板单元 三维Biot有限元 遗传算法 

分 类 号：TU471.8[建筑科学—结构工程]