Abstract
In expressways high bridge piers exist in mountainous areas. Some of such high piers are higher than 50m, and were designed to have hollow cross sections to minimize self-weight. The longitudinal reinforcement was curtailed at several levels according to the previous seismic codes.
Since seismic retrofit of high bridge piers has been conducted in few cases and has many restrictions, planning and desigh of seismic retrofit involves a number of technical decisions.
From the experimental results, authors proposed design method for seismic retrofit of high piers with carbon fiber sheets and a retrofitting work of hollow circular piers with an average of 53 m were performed according to the study.
