Seismic Assessment and Retrofit Strategy of Taiwan Roadway Bridges

Abstract eng:
Since Taiwan is located in a seismic hazard region, the seismic assessment and retrofit of older bridges is very important. In order to ensure the safety of traffic network, a project has been carried out to assess the seismic resistant capacity over 2,200 bridges on the Taiwan Roadway System. The assessment process is divided into two stages. The first stage is the preliminary assessment which all the bridges will be evaluated using simple seismic review sheets to determine the evaluation points. Further investigation will be carried out if the evaluation point is greater than 60 points. On the second stage, 5% of total bridges will be selected to perform the detail analysis. The state-of-the-art nonlinear static analysis (pushover analysis) is adopted to calculate the seismic capacity of bridge. Based on the assessment results, the retrofit strategy will be established. This paper will illustrate the assessment process and introduce the preliminary results.

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