Reliability Assessment and Reliability-Based Rating of Existing Road Bridges

by H. -N. Cho, Hanyang Univ, Republic of Korea,
A. H. -S. Ang, Hanyang Univ, Republic of Korea,

Document Type: Proceeding Paper

Part of: Structural Safety and Reliability


A practical reliability model for the safety assessment and rating of existing R.C. bridges are developed by explicitly incorporating the degree of deterioration and damages based on available inspection or test data. The stable configuration approach is used for an approximate but conservative estimation of the system reliability of existing bridges. It is suggested that the system reliability index be used as a rating criterion for bridge rehabilitation. Also, a reliability-based LRFR (Load and Resistance Factor Rating) is proposed.

Subject Headings: Load and resistance factor design | Ratings | Existing buildings | Highways and roads | Bridge tests | Concrete bridges | System reliability | Highway bridges

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