|
Title |
Effect of Dead Load on the Concrete Breakout Strength of a Bridge Bearing
|
|
Authors |
박주현(Ju-Hyun Park) ; 윤성환(Sung-Hwan Yun) ; 박창호(Chang-Ho Park) ; 천성철(Sung-Chul Chun) ; 이종한(Jong-Han Lee) |
|
DOI |
https://doi.org/10.4334/JKCI.2023.35.3.317 |
|
Keywords |
콘크리트 브레이크아웃강도; 교량 받침; 고정하중; 전단하중; 콘크리트 비선형 모델 concrete breakout strength; bridge bearing; dead load; shear load; concrete nonlinear model |
|
Abstract |
This study evaluated the effect of dead load in the design and evaluation of concrete breakout strength in bridge bearings. For this, the bearings with insufficient seismic performance in Korean highway bridges were analyzed to determine the ratio of the dead load to designed seismic load. Then, representative bridges were selected for numerical analysis. Compared with the existing evaluation equation, the analysis results showed a slight difference of approximately 0.6 %. The verified numerical model indicated a significant increase in concrete breakout strength and a decrease in displacement with an increase in dead load. When accounting for the action of the dead load, the concrete breakout strength of the representative bridge bearing was approximately 1.8 to 2.0 times the concrete breakout strength obtained from the current evaluation equation.
|