Seismic analysis of integral bridge considering the influence of soil structure interaction

Abstract In Simply supported bridge, superstructure and substructure are separated by the expansion joint bearing. Integral bridge (IB), deck is casted monolithically with abutment wall. bridges have increased redundancy, which improves its seismic performance. Bridge fails may fail due to failure of bearing, non‐availability seating width does not occur in IB. The single pile analysis performed Csi L software same soil parameter shows that parameters from API guideline can be used FEM represent SPI. FE modelling a benchmark IB modelled Bridge. Soil surrounding represented series nonlinear spring p–y curve, t‐z curve q‐z based on API. Seismic Capacity determined using static nonlinearity assigned pile. forces induced piles observed within elastic capacity. Parametric study variation (loose sand, medium sand stiff clay) Nonlinear stiffness has significant effect response.