Verification of Modulus of Subgrade Reaction Experimental Based on Plate Deflection
Athaya Zhafirah (a*), Andri Krisnandi Somantri (b), Eko Walujodjati (a), Subhan Mulyana (a)

(a*) Department of Civil Engineering, Sekolah Tinggi Teknologi Garut, Jalan Mayor Syamsu 1, Garut 44151, Indonesia
*athaya[at]sttgarut.ac.id
(b) Department of Civil Engineering, Politeknik Negeri Bandung, Jalan Gegerkalong Hilir, Bandung 40559, Indonesia

Abstract

This study aims to verify the modulus of subgrade reaction test results of the plate load test or empirical formula based on the deflection of the finite element analysis results that are closest to the deflection of the concrete plate loading test results in the laboratory. Modulus of subgrade reaction experimentally obtained from the plate load test results. While the modulus of subgrade reaction using an empirical formula, according to FEMA 356, is calculated using an equation that is influenced by the value of the shear modulus, Poisson ratio, and plate dimensions. The method in this study is analysis and experimental. The verification is carried out by finite element analysis by adjusting the dimensions and parameters of the material with an experimental model for loading concrete plate in the laboratory. Verification of the modulus of subgrade reaction carried out by looking at the deflection of the finite element modeling, which is the closest to the deflection of the experimental results of loading concrete plate in the laboratory. The modulus of the verified subgrade reaction is the value obtained based on the empirical formula because it has almost the same deflection compared to the experimental soil modulus value.

Keywords: Geotechnical engineering; Modulus of subgrade reaction; Concrete plate deflection; Experimental; Finite element method

Topic: Civil Engineering