민감도 해석을 통한 무조인트 교량의 수치해석 모델 제안

Abstract

The subject of this study is a jointless bridge that integrates the superstructure and the abutment without installing an expansion joint. Jointless bridges have been introduced in Korea since 2009. Due to the short period of use and lack of experience in design, construction and maintenance, reliability for long-term behavior is still insufficient. When analyzing a number of bridges through numerical analysis, the numerical analysis model must maintain stable accuracy and ensure the convenience of model construction. In this study, sensitivity analysis was performed to select a numerical model for jointless bridges with various types. Sensitivity analysis was performed using a commercial finite element program, MIDAS Civil. The average and maximum relative error between structural models were analyzed based on the model based on the solid element. As a result of the analysis at the top of the wall, the beam element-based model had a large relative error, and the shell element-based model had a very small relative error. Therefore, the shell element-based model, which is a practical model, was most suitable for the optimal numerical analysis model of the jointless bridge while maintaining the similarity and precision of the displacement shape due to the relative error.