On the seismic performance of straight integral abutment bridges: From advanced numerical modelling to a practice‐oriented analysis method

The seismic performance of integral abutment bridges (IABs) is affected by the interaction with surrounding soil, and specifically development forces in embankment-abutment soil-piles systems. In principle, these effects could be evaluated means highly demanding numerical computations that, however, can carried out only for detailed studies specific cases. By contrast, a low-demanding analysis method needed design-oriented assessment longitudinal IABs. To this purpose, present paper describes design technique which frequency- amplitude-dependency soil-structure modelled simplified manner. Specifically, consists time-domain soil-bridge model, simulated distributed nonlinear springs connecting free-field ground response model to structural system. results are validated against advanced analyses, considering different scenarios. its state development, proposed used an efficient evaluation straight IABs constitute starting point prospective generalisation three-dimensional response.