SEISMIC MODELING OF MULTISPAN SIMPLY-SUPPORTED BRIDGES USING ADINA

A major component of the Seismic Retrofit Program in the State of New Jersey includes analysis and evaluation of high-risk bridges. Most bri dges in New Jersey (and more generally in the eastern U.S.A.) are mult i-span simply-supported, thus creating the high possibility of impact of adjacent spans in the longitudinal direction. The results of an ong oing study on modeling and the effect of impact on the seismic respons e of bridges is presented. ADINA is used for development of nonlinear bridge models. A number of practical examples indicating how ADINA can be used for analysis of different bridge components are also illustra ted. (C) 1997 Elsevier Science Ltd.