This study focuses on the behaviour of soil-foundation interaction under a bridge pier. In 2016, August 25, a magnitude of 6.8 happened near Bagan region. Pakokku Bridge, the longest of the bridges over the Irrawaddy, is situated on 37.8 miles from the epicentre of 2016 Chauk earthquake. That is why the safety performance of long-span Bridge especially for the safety of the foundation system subjected to soil-foundation interaction is necessary to investigate for static and seismic excitation. So, study on the behaviour of soil-foundation interaction under Bridge pier in static condition is presented in this study. Firstly super structural loadings on the pile cap are estimated by using STAAD PRO V8i. And then, theoretical ultimate soil resistance pcr and pcd due to wedge and flow failure are determined to produce critical depth xcr. Based on the value of critical depth, p-y curves are generated by Reese (1974) method for the static condition. After that, finite element software ABAQUS is used for the analysis of soil-foundation interaction under a bridge pier. In this study, the behaviour of soil-foundation interaction such as deflections, settlements, shear stresses and shear strains are produced. According to the analysis results, it is found that the vertical and horizontal displacements at the pile tip are 1.27mm and 4.68mm respectively. Maximum shear stress and strain are found out the base of the pile cap. Finally it is found that the soil-foundation interaction under a bridge pier presented in this study is reliable and reasonable with the limitation of AASHTO Standard Specifications for Highway Bridges.
Pakokku Bridge, Soil-foundation interaction, Abaqus, p-y curves, Static condition
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