基于Drucker-Prager模型的受载层状土变形模拟分析  

Simulation Analysis of the Deformation of Layered Soils Subjected to Additional Load Based on Drucker-Prager Model

作　　者：赵莉 李亦宁 ZHAO Li;LI Yining(School of Resources&Civil Enginering,Northeastem University,Shenyang,Liaoning 110819,China;Faculty of Science,University of Manitoba,Winnipeg MB R3T 2N2,Canada)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]曼尼托巴大学科学学院,温尼伯格,MBR3T2N2

出　　处：《水利与建筑工程学报》2022年第6期116-122,共7页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金面上项目(51878127);辽宁省自然科学基金计划项目(2013020147)。

摘　　要：为了克服传统地基变形计算采用单一的岩土材料本构模型且仅在弹性的范畴单点逐次计算的困难,创建了一种网格子域系统分层法,推导了层状土内有效附加应力计算公式,建立了受载层状土竖向变形计算方法,基于MATLAB语言平台编写了层状土竖向变形SSBS分析程序,采用Drucker-Prager弹塑性本构模型并结合工程实测数据,计算分析了大型基础下受载层状土的基底竖向变形,计算结果得到了理论和工程实测数据的验证,提出的计算方法和分析程序能够有效地解决层状土的地基变形问题。In order to overcome the difficulty of traditional foundation deformation calculation using a single constitutive model of geotechnical materials, the calculation method is single point by point only in the category of elasticity, the distributed grid sub-domain system was developed, the theoretical formula of calculating effective additional stress in the soils was derived, the method for calculating vertical deformation of layered soils subjected to additional load was established. The SSBS analysis program for vertical deformation of layered soil is compiled based on MATLAB language platform, Drucker-Prager elasto-plastic constitutive model is adopted in combination with the measured data of the project, then the vertical deformation of the base of the layered soil under the large foundation is calculated and analyzed, calculation results are verified by the theoretical and engineering measured data, the proposed calculation method and analysis program can effectively solve the problem of layered soil foundation deformation.

关 键 词：层状土 DRUCKER-PRAGER模型 等效集中力 变形 整体稳定 

分 类 号：TU398[建筑科学—结构工程]