Abstract
An integral bridge, which is constructed without expansion joints and bearings, is an economical technology that permits slender abutment and footing design to decrease the associated maintenance and construction costs. In this study, a geosynthetic reinforced integral abutment (IA) for railways and a conventional reinforced concrete abutment (CA) are modeled, considering the two types of foundations, using the finite element method. The passive soil stiffness of the foundations was evaluated through the application of a uniform horizontal load in four separate models. The passive soil stiffness of the IA model is approximately 70% of that of the CA model. Additionally, we confirmed that the passive soil stiffness was affected by changes in the thickness of the abutment, size of the footing, number of installation piles, and elastic modulus of the ground.
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