Bridge Time-Variant Reliability Assessment Considering Resistance Deterioration and Load Change

Xun Wu; Zhi Chao Zhang; Jie Li; Xian Shui Yi

doi:10.4028/www.scientific.net/AMM.638-640.929

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 638-640Bridge Time-Variant Reliability Assessment...

Bridge Time-Variant Reliability Assessment Considering Resistance Deterioration and Load Change

Abstract:

With the bridge member resistance deterioration and traffic volume increasing on the bridge, bridge reliability considering time-variant factors has become an important problem. This paper presents a method to estimate the bridge safety performance based on time-dependent model of resistance decreasing and load change. Power form functions are used to fit the resistance degradation models in three environmental conditions, and time-dependent model of load increasing is built in accordance with traffic observation results somewhere. The results show that normal distribution probability model can be used to fit dead load time-varying model. In analysis, the most disadvantageous load combination effect is mainly considered, live load time-varying function approximately follows extreme type I distribution model. Finally the proposed approach combined with Monte Carlo method is used to assess the time-varying reliability index and the safe serving time of one prestressed concrete bridge in use.

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Periodical:

Applied Mechanics and Materials (Volumes 638-640)

Pages:

929-932

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.638-640.929

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Online since:

September 2014

Authors:

Xun Wu*, Zhi Chao Zhang, Jie Li, Xian Shui Yi

Keywords:

Bridge, Load Increasing, Monte Carlo Method, Resistance Level, Safe Serving Time, Time Varying Reliability

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* - Corresponding Author

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