Variability of subgrade reaction modulus on flexible mat foundation

Sangseom Jeong, Jongjeon Park, Moonhyun Hong, Jaehwan Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)757-774
Number of pages18
JournalGeomechanics and Engineering
Volume13
Issue number5
DOIs
Publication statusPublished - 2017 Nov

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology

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