A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Computer Study of Redundancy of a Single Span Welded Steel Two-Girder Bridge
The AASHTO Highway Bridge Specifications penalize nonredundant steel members in bridges but present only rough and conservative guidelines for actually determining if a structure is redundant. The guidelines are based on the usual steel bridge design procedures, which in turn are based on oversimplified 2- dimensional idealizations of complex 3- dimensional structures. There is reason to believe that secondary members not specifically designed for vertical load actually contribute greatly to the redundancy of the bridge, providing a contribution to load redistribution capability not currently accounted for in design. The report describes a computer study investigating the hypothesis that a welded steel 2- girder bridge, commonly thought to be nonredundant, actually possesses significant load redistribution capability provided by such secondary member as the floor beams, cross frames, and bottom laterals. A finite element model of a real simple-span right 2- girder bridge is developed and subjected to dead load while imposing a full depth main girder crack at midspan. The results provide significant insights into the structural behavior and load redistribution mechanisms of the damaged bridge under dead load.
Computer Study of Redundancy of a Single Span Welded Steel Two-Girder Bridge
The AASHTO Highway Bridge Specifications penalize nonredundant steel members in bridges but present only rough and conservative guidelines for actually determining if a structure is redundant. The guidelines are based on the usual steel bridge design procedures, which in turn are based on oversimplified 2- dimensional idealizations of complex 3- dimensional structures. There is reason to believe that secondary members not specifically designed for vertical load actually contribute greatly to the redundancy of the bridge, providing a contribution to load redistribution capability not currently accounted for in design. The report describes a computer study investigating the hypothesis that a welded steel 2- girder bridge, commonly thought to be nonredundant, actually possesses significant load redistribution capability provided by such secondary member as the floor beams, cross frames, and bottom laterals. A finite element model of a real simple-span right 2- girder bridge is developed and subjected to dead load while imposing a full depth main girder crack at midspan. The results provide significant insights into the structural behavior and load redistribution mechanisms of the damaged bridge under dead load.
Computer Study of Redundancy of a Single Span Welded Steel Two-Girder Bridge
S. S. Chen (author) / J. H. Daniels (author) / J. L. Wilson (author)
1986
74 pages
Report
No indication
English
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