MATLAB GUI Design Based on Rapid Judgment of Shear Failure State of Soil
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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。
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关键词:
- 土力学 /
- 剪切破坏 /
- 摩尔–库仑理论 /
- 程序开发 /
- MATLAB GUI界面
Abstract: 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.-
Key words:
- soil mechanics /
- shear failure /
- Mohr-Coulomb theory /
- program development /
- MATLAB GUI
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表 1 直接剪切试验数据记录
试样面积/cm2 垂直压力p/kPa 抗剪强度τ/kPa 抗剪强度指标 黏聚力c/kPa 内摩擦角φ/(°) 30 100 77.85 26.38 27.23 200 129.01 300 180.54 400 232.25 
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