Study of the Dynamic and Equivalent Static Analysis Methods forSeismic Design of Bridges: Ranges of Applicability,Effect of Modeling Assumptions, and Support Conditions

摘要

The paper presented several studies concerning the structural analysis in the seismicdesign of bridges on (1) the dynamic and equivalent static analysis methods usedcurrently in the seismic design of bridges, and the limits of applicability of thedifferent methods are studied. A parametric study is carried out and presented. (2)Then, the modeling assumptions used to prepare input data for the analysis arediscussed. The effect of soil-structure interaction (SSI), and cracking of thereinforced concrete columns (effective cross section properties) are studied.(3) Finally, a comparison of the response of different bridge structural systems toearthquakes is presented. The effect of the boundary / support conditions on theforces and deformations developed in the bridge due to seismic actions is studied.