A Study on Evaluation of Seismic Capacity for Existing Bridges

• Main Authors: Wei-Hwan, Yang, 楊為桓
• Other Authors: Yen-Po Wang
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/94107951183097610545

碩士 === 國立交通大學 === 工學院碩士在職專班營建技術與管理組 === 94 === The seismic design specification has been revised to meet the increased seismic loads requirement / demand in which all the new bridges are designed to higher seismic capacity after the event of Chi-Chi Earthquake. For ensuring public safety and increasing reliability of the bridge, the revised seismic design specification has adopted a more conservative design approach. Therefore, it would increase additional constructing cost. This study is to assess the related modifications to reflect the revision seismic design specification and another significant matter is to analyze whether the existing bridge employing the previous seismic specification has an adequate seismic capacity to meet the revised seismic demand. In this report, the methodology of displacement-based approach is adopted for the evaluation of existing bridges. The displacement ductility capacity of piers is employed to estimate whether the bridge has an adequate ductility meeting the safety requirement of public transportation during earthquake.