Performance-based concept on seismic evaluation of existing bridges

Conventional seismic evaluation of existing bridges explores the ability of a bridge to survive under significant earthquake excitations. This approach has several major drawbacks, such as only a single structural performance of near collapse is considered, and the simplified approach of adopting st...

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Bibliographic Details
Published in:Earthquake Engineering and Engineering Vibration 2009-03, Vol.8 (1), p.127-135
Main Authors: Sung, Yu-Chi, Liao, Wen-I., Yen, W. Phillip
Format: Article
Language:English
Subjects:
Accuracy
Bridges
Civil Engineering
Control
Dynamical Systems
Earth and Environmental Science
Earth Sciences
Earthquakes
Evaluation
Geotechnical Engineering & Applied Earth Sciences
Pushover分析
Seismic activity
Seismic analysis
Seismic engineering
Seismic response
Studies
Survival
Vibration
地震评估
峰值加速度
抗震评估
桥梁抗震
结构性能
非线性时程分析
非线性行为
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Summary:Conventional seismic evaluation of existing bridges explores the ability of a bridge to survive under significant earthquake excitations. This approach has several major drawbacks, such as only a single structural performance of near collapse is considered, and the simplified approach of adopting strength-based concept to indirectly estimate the nonlinear behavior of a structure lacks accuracy. As a result, performance-based concepts that include a wider variety of structural performance states of a given bridge excited by different levels of earthquake intensity is needed by the engineering community. This paper introduces an improved process for the seismic evaluation of existing bridges. The relationship between the overall structural performance and earthquakes with varying levels of peak ground acceleration （PGA） can successfully be linked. A universal perspective on the seismic evaluation of bridges over their entire life-cycle can be easily obtained to investigate multiple performance objectives. The accuracy of the proposed method, based on pushover analysis, is proven in a case study that compares the results from the proposed procedure with additional nonlinear time history analyses.
ISSN:1671-3664
1993-503X
DOI:10.1007/s11803-009-8151-3