Nonlinear seismic response analysis of steel cable stayed bridge model based on vibration monitoring data

Abstract

Structural monitoring is expected to improve accuracy of seismic performance evaluation of existing structures. Vibration monitoring data is suitable for composing dynamic numerical model and ambient vibration data are available instead of limited number of seismic data. In this study, a steel cable stayed bridge is modeled based on ambient vibration data and its bearing are represented in bilinear model. Validity of the model is confirmed by dynamic response analysis for recorded minor seismic waves. Then large seismic ground motions are input to the model and different action of bearing is confirmed. Hence the entire responses of the bridge are reasonable for each seismic input by using the proposed model.