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Reliability-Based LRFD For Bridges: Theoretical Basis

by Masanobu Shinozuka, Princeton Univ, United States,
Hitoshi Furuta, Princeton Univ, United States,
Susumu Emi, Princeton Univ, United States,
Masakuni Kubo, Princeton Univ, United States,



Document Type: Proceeding Paper

Part of: Structural Safety and Reliability

Abstract:

This paper develops a theoretical basis for obtaining probability-based load combination criteria for structural design. For choosing the load combinations and for determining the factors to be considered in a load and resistance factor design (LRFD) format, the notion of limit state probability diagram is introduced to help establish the interrelationship among the limit states, limit state probabilities, target limit state probabilities and load combinations. This paper presents a practical procedure of numerical optimization of these factors based on the structural reliability theory in order to upgrade design codes for highway bridges.

Subject Headings: Load and resistance factor design | Structural reliability | Load combinations | Highway bridges | Structural design | Probability | Structural safety

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