Seismic Damage Assessment of Integral Abutment Bridge

摘要

Seismic vulnerability assessment of bridge is an important subject in the domain of bridge engineering. Both for functional bridges and new bridges, possible damages during strong ground shaking need to be assessed properly for their performance evaluation and any requirement of strengthening options. For assessment of seismic damages in bridges, damage states need to be established for the components. Although, past studies have focussed on the possible damage states, detailed investigation on damage states has not been carried out for integral abutment bridges. The present study aims to obtain realistic quantitative damage state estimates for the structural components of a continuous cast-in situ concrete deck bridge with integral abutments during possible seismic action. Adaptive nonlinear static analysis is carried out on the spline model of the bridge with soil-structure interaction effects at soil-pile and abutment-backfill interfaces. It is observed that abutment piles are the most vulnerable components for the considered bridge and govern the displacement capacity of the bridge system.