Variability of subgrade reaction modulus on flexible mat foundation

Sangseom Jeong, Jongjeon Park, Moonhyun Hong, Jaehwan Lee

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


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
Issue number5
Publication statusPublished - 2017 Nov

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No. 2011-0030040, NRF-2014R1A2A1A11054606). This work was also supported by a grant (code 17SCIP-B119960-02) from Construction Technology Research Program funded by Ministry of Land, Infrastructure and Transport of Korean government.

Publisher Copyright:
© 2017 Techno-Press, Ltd.

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology


Dive into the research topics of 'Variability of subgrade reaction modulus on flexible mat foundation'. Together they form a unique fingerprint.

Cite this