Proposal of Disaster Management Criteria of Seismic Accelerometers Installed on the Primary Structural Elements of Cable-Supported Bridges Based on Long-Term Data

Abstract

This study presents a proposal of disaster management criteria of seismic accelerometers installed on primary structural elements of cable-supported bridges. Extreme value distributions of accelerations are estimated with respect to 1 month of a reference time period based on a statistical estimation method that uses the long-term records of acceleration measured at the target cable-supported bridges. Extreme value distributions of the acceleration with respect to reference time periods of 100 years and 1000 years are extrapolated by applying extreme value theory, and the disaster management criteria are proposed based on the mean values of the estimated extreme value distributions of the acceleration. The validity of the proposed disaster management criteria is verified through comparison with the peak values of recorded accelerations during the Gyeongju and Pohang earthquakes. Keywords: Cable-supported Bridge, Seismic Accelerometers, Disaster Management Criteria, Extreme Value Distributions