Effect of isolation on bridge seismic design and response

Student: Olympia Dimitriadou
Supervisors: Michael Fardis

ABSTRACT

The aim of this document is to evaluate the seismic performance of an existing bridge after the implementation of lead-rubber bearings on top of its piers. In order to achieve this, a computational capability, developed in the University of Patras, was used for the seismic assessment of the bridge and the response -nonlinear dynamic- analyses. Based on these results and the performance levels of the bridge in different PGA's, a detailed design and modeling of the seismic isolation was performed as to upgrade the seismic performance in a certain level.

The dynamic response of the bridge is presented before and after the implementation of the leadrubber bearings as well as comparative results.

Finally, some conclusions are given regarding the analytical results, the modeling issues, the effectiveness of seismic isolation and some practical issues.

You may download a digital version of this MSc dissertation here.