• 제목/요약/키워드: mat

검색결과 1,668건 처리시간 0.035초

3D analytical method for mat foundations considering coupled soil springs

  • Lee, Jaehwan;Jeong, Sangseom;Lee, Joon Kyu
    • Geomechanics and Engineering
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    • 제8권6호
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    • pp.845-857
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    • 2015

  • The 3D numerical analysis is carried out to investigate the settlement behavior of flexible mat foundations subjected to vertical loads. Special attention is given to the improved analytical method (YS-MAT) that reflects the mat flexibility and soil spring coupling effect. The soil model captures the stiffness of the soil springs as well as the shear interaction between the soil springs. The proposed method has been validated by comparing the results with other numerical approaches and field measurements on mat foundation. Through comparative studies, the proposed analytical method was in relatively good agreement with them and capable of predicting the behavior of the mat foundations.

  • https://doi.org/10.12989/gae.2015.8.6.845 인용 KSCI

Variability of subgrade reaction modulus on flexible mat foundation

  • Jeong, Sangseom;Park, Jongjeon;Hong, Moonhyun;Lee, Jaehwan
    • Geomechanics and Engineering
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    • 제13권5호
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    • pp.757-774
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    • 2017

  • The subgrade reaction modulus of a large mat foundation was investigated by using a numerical analysis and a field case study. The emphasis was on quantifying the appropriate method for determining the subgrade reaction modulus for the design of a flexible mat foundation. A series of 3D non-linear FE analyses are conducted with special attention given to the subgrade reaction modulus under various conditions, such as the mat width, mat shape, mat thickness, and soil condition. It is shown that the distribution of the subgrade reaction modulus is non-uniform and that the modulus of subgrade reaction at both the corners and edges should be stiffer than that at the center. Based on the results obtained, a simple modification factor for the subgrade reaction modulus is proposed depending on the relative positions within the foundation in weathered soil and rocks.

  • https://doi.org/10.12989/gae.2017.13.5.757 인용 KSCI

A two-dimensional hyperbolic spring model for mat foundation in clays subjected to vertical load

  • Der-Wen Chang;Tzu-Min Chou;Shih-Hao Cheng;Louis Ge
    • Geomechanics and Engineering
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    • 제37권5호
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    • pp.527-538
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    • 2024

  • This study proposes a two-dimensional hyperbolic soil spring model for mat foundations in clays subjected to vertically uniform loads to simplify the complexity of three-dimensional finite element analysis on mat foundations. The solutions from three-dimensional finite element analysis were examined to determine the hyperbolic model parameters of the soil springs underneath the slab. Utilizing these model parameters, normalized functions across the middle section of the mat were obtained. The solutions from the proposed model, along with the approximate finite difference analysis of the mat in clays under vertical load, were found to be consistent with those from the three-dimensional finite element analysis. The authors conclude that the proposed method can serve as an alternative for the preliminary design of mat foundations.

  • https://doi.org/10.12989/gae.2024.37.5.527 인용