Abstract:
ABSTRACT: Bridges have been the backbone of infrastructure since the past. With the development of infrastructure, the requirement for bridges on water bodies is increasing. Scouring of soil is the major concern for the various hydraulic structures. Scouring has a great impact on the load-bearing capacity of the foundations for hydraulic structures. Hence, consideration of scouring in the design of foundations for hydraulic structures is crucial. Pile groups in bridges are subjected to combined vertical and horizontal loading due to self-weight, live loads, vehicular impacts, wind load, earth pressure, and current loading. Hence, an assessment of the combined bearing capacity of pile groups subjected to scour is essential for the safety of the structure. This paper aims to analyze the bearing capacity of pile group supported bridge under combined loading i.e., Vertical (V) and Horizontal (H) loading subjected to scour. A three-dimensional finite element model (3D-FEM) of the pile group is established in Abaqus CAE. A 3x3 pile group is considered embedded in homogeneous sandy soil. Mohr-Coulomb plasticity model is used for the soil domain. The pile group is modeled as linear elastic. Finally, V-H yield envelopes are obtained considering soil with and without scour. The potential impact of different parameters, such as angle of attack, flow velocity, depth flow, and different length-to-diameter ratios (L/D) and spacing-to-diameter ratios (S/D) of pile group on V-H yield envelopes is studied.
Keywords: Bearing Capacity; Finite Element Analysis; yield envelope; Pile group; Scouring
Abstract: Theme 6