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CONTINUING DEVELOPMENTS ON THE MULTI-PART AASHTO LRFD SPECIFICATIONS FOR BRIDGES

John M. Kulicki, Dennis R. Mertz

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Abstract

In 1993, following a five-year concentrated effort, the American Association of State Highway and Transportation Officials (AASHTO) adopted new specifications for bridge design as a co-equal to the time-honored standard specifications - The AASHTO LRFD Bridge Design Specifications. This paper summarizes the development of the specifications, outlines the decision-making processes, introduces how reliability-based design and limit states are related to design load combinations, describes the limit state philosophy and introduces post-adoption maintenance and education efforts, and introduces the ongoing work to extend the LRFD Specifications into a multi-volume set of specifications. For the covering abstract see ITRD E111699.

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In 1993, following a five-year concentrated effort, the American Association of State Highway and Transportation Officials (AASHTO) adopted new specifications for bridge design as a co-equal to the time-honored standard specifications - The AASHTO LRFD Bridge Design Specifications. This paper summarizes the development of the specifications, outlines the decision-making processes, introduces how reliability-based design and limit states are related to design load combinations, describes the limit state philosophy and introduces post-adoption maintenance and education efforts, and introduces the ongoing work to extend the LRFD Specifications into a multi-volume set of specifications. For the covering abstract see ITRD E111699.

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Available abstract

In 1993, following a five-year concentrated effort, the American Association of State Highway and Transportation Officials (AASHTO) adopted new specifications for bridge design as a co-equal to the time-honored standard specifications - The AASHTO LRFD Bridge Design Specifications. This paper summarizes the development of the specifications, outlines the decision-making processes, introduces how reliability-based design and limit states are related to design load combinations, describes the limit state philosophy and introduces post-adoption maintenance and education efforts, and introduces the ongoing work to extend the LRFD Specifications into a multi-volume set of specifications. For the covering abstract see ITRD E111699.

Key concepts: Bridge (graph theory), Engineering, Work (physics), Limit state design, Bridge maintenance, Transport engineering, State (computer science), Reliability (semiconductor)

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