摘要
土的剪切破坏是土体破坏的主要形式,基于土体受力特性快速判断其是否发生剪切破坏具有很好的工程应用价值。从这一工程背景出发,基于摩尔–库仑强度理论,借助MATLAB的GUI图形用户界面设计方法,开发了土体剪切计算及破坏判断的计算系统,通过在系统中输入特定土体的直剪试验数据,即可快速拟合得到黏聚力及内摩擦角,同时基于最大、最小主应力及内摩擦角三种比较法,快速判断土体是否发生剪切破坏。通过直剪试验证明了该计算系统的可靠性。结果表明:该系统计算速度快,精度高,效果良好,可用于工程实际中土体抗剪强度指标计算及破坏状态的快速判断。
The shear failure of soil is the main form of soil failure.It is of great engineering application value to judge the shear failure of soil quickly based on the mechanical characteristics of soil.Starting from the engineering background,based on the Mohr-Coulomb strength theory,MATLAB GUI graphical user interface design method was applied and the soil shear calculation and the damage judgment system were developed.If direct shear test data of specific soil are input in the system,cohesive force and internal friction angle could be obtained quickly by fitting.At the same time,based on comparative laws of the maximum and minimum principal stress and internal friction angle,whether the soil shear failure occurred or not could be determined quickly.The reliability of the calculation system is proved by direct shear experiment.The results show that the system is fast,accurate and effective,and can be used to calculate the shear strength of soil and judge the failure state quickly in engineering practice.
作者
李倩
李娇娇
陈二忠
Li Qian;Li Jiaojiao;Chen Erzhong(Department of Civil Engineering,Hebei University,Baoding 071002,Hebei,China)
出处
《岩土工程技术》
2021年第6期361-364,372,共5页
Geotechnical Engineering Technique
基金
河北大学试验室开放项目(sy202023)
河北大学人才引进科研启动项目(801260201302)
河北大学校长基金项目(XZJJ201911)。
