ABSTRACT
Generally, the bridge piers are retrofitted to improve the seismic performance by increasing its structural ductility or strength. However, the retrofit of bridge piers may cause unexpected damage to the remaining non-retrofitted components. Therefore, in Taiwan, the retrofit strategy is determined based on the seismic performance of the bridge piers and performance inspection of each specified components, including the foundation, capping beam, bearing pad, and unseating prevention device. Furthermore, in this work, the reliability of each specified component and system reliability, which are normally ignored, are considered to determine the need of retrofit. In addition, the potential costs (indirect costs) caused by the retrofit methods, which would probably affect the benefit-cost ratio and determination of the retrofit strategy, are considered. The indirect cost was calculated based on the bridge’s resilience index. Thus, the purpose on this work only focuses on developing a quantification method that can be used calculate the relationship between the resilience and seismic intensity for a specified retrofit strategy. A bridge in Taipei is selected in this work to demonstrate the application of the proposed procedure.
