Finite Element Analysis of the Meloland Road Overpass and Alternate Model Configurations.

摘要

The primary purpose of this project is to explore the nonlinear seismic response of an ordinary two span bridge using advanced nonlinear computational techniques. For that purpose, MSBridge, a new nonlinear finite element graphical user interface which conducts calculations using the platform OpenSees is employed. The Meloland Road Overpass is used as the benchmark structure for a parametric study of alterations in salient modeling details. The investigated bridge systems are subjected to three component earthquake accelerations scaled to fit an appropriate Caltrans site-specific spectrum.;The examined model configurations address the influence of the transverse reinforcing ratio, and the general effect of implementation of a steel jacket for the column. The various model response characteristics are compared and discussed. Throughout the conducted MSBridge analyses, every modified model responded in a logical fashion with respect to the specified alteration. Therefore, MSBridge proves to be a useful tool when conducting ordinary bridge model analyses. Overall, the conducted numerical studies provide valuable insights into the mechanisms of resistance supplied by the bridge column and its abutments.