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RELIABILITY BASIS FOR LRFD BRIDGE CODES

Andrzej S. Nowak

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Abstract

The paper summarizes the probabilistic background for calculation of load and resistance factors for a bridge design code. The work involves the development of load and resistance models, selection of the reliability analysis method and calculation of the reliable indices. The statistical data on load and resistance is reviewed. Load models are developed for live load and dynamic load. Resistance models are developed for girder bridges (steel, reinforced concrete and prestressed concrete). Reliability indices are calculated for bridges designed using the current AASHTO specifications.

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What this paper is about

The paper summarizes the probabilistic background for calculation of load and resistance factors for a bridge design code. The work involves the development of load and resistance models, selection of the reliability analysis method and calculation of the reliable indices. The statistical data on load and resistance is reviewed. Load models are developed for live load and dynamic load. Resistance models are developed for girder bridges (steel, reinforced concrete and prestressed concrete). Reliability indices are calculated for bridges designed using the current AASHTO specifications.

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Available abstract

The paper summarizes the probabilistic background for calculation of load and resistance factors for a bridge design code. The work involves the development of load and resistance models, selection of the reliability analysis method and calculation of the reliable indices. The statistical data on load and resistance is reviewed. Load models are developed for live load and dynamic load. Resistance models are developed for girder bridges (steel, reinforced concrete and prestressed concrete). Reliability indices are calculated for bridges designed using the current AASHTO specifications.

Key concepts: Structural engineering, Bridge (graph theory), Reliability (semiconductor), Reliability engineering, Girder, Structural load, Engineering, Prestressed concrete

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