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LRFD for U. S. Bridge Design — Validation Issues

John M. Kulicki, Dennis R. Mertz

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Abstract

During the 1987 meeting of the AASHTO Subcommittee on Bridges and Structures, recommendations from the National Cooperative Highway Research Program (NCHRP), Project 20-7/31, regarding the development of a probability-based Load and Resistance Factor Design (LRFD) bridge specification were accepted. NCHRP Project 12-33 was initiated to actually develop the specifications and a suitable commentary. That project officially started in July of 1988 and is now approximately eight months underway. During the course of the assembly of a 'strawman' document by a core-group of design professionals from the Principal Investigative staff and a group known as the Code Coordinating Committee, several basic issues related to validating the LRFD development have been identified. This paper discusses those issues and the approach which will be used to satisfy this concern.

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What this paper is about

During the 1987 meeting of the AASHTO Subcommittee on Bridges and Structures, recommendations from the National Cooperative Highway Research Program (NCHRP), Project 20-7/31, regarding the development of a probability-based Load and Resistance Factor Design (LRFD) bridge specification were accepted. NCHRP Project 12-33 was initiated to actually develop the specifications and a suitable commentary. That project officially started in July of 1988 and is now approximately eight months underway. During the course of the assembly of a 'strawman' document by a core-group of design professionals from the Principal Investigative staff and a group known as the Code Coordinating Committee, several basic issues related to validating the LRFD development have been identified. This paper discusses those issues and the approach which will be used to satisfy this concern.

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Available abstract

During the 1987 meeting of the AASHTO Subcommittee on Bridges and Structures, recommendations from the National Cooperative Highway Research Program (NCHRP), Project 20-7/31, regarding the development of a probability-based Load and Resistance Factor Design (LRFD) bridge specification were accepted. NCHRP Project 12-33 was initiated to actually develop the specifications and a suitable commentary. That project officially started in July of 1988 and is now approximately eight months underway. During the course of the assembly of a 'strawman' document by a core-group of design professionals from the Principal Investigative staff and a group known as the Code Coordinating Committee, several basic issues related to validating the LRFD development have been identified. This paper discusses those issues and the approach which will be used to satisfy this concern.

Key concepts: Bridge (graph theory), Engineering, Principal (computer security), Construction engineering, Transport engineering, Civil engineering, Forensic engineering, Computer science

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