| This study is a step-by-step design procedure of a simply supported Steel Plate Girder Superstructure Bridge using the provisions of the following: American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) Bridge Design Specifications, 2nd Edition 1998, and 2001 Interim Provisions, which shall be simply referred to as the AASHTO LRFD Code.
The concept that was utilized in the AASHTO LRFD method is the use of the additional moments that the section could develop beyond the yield moment. This is one of the indicating factors that the AASHTO LRFD Code is more economical to use compared to the Service Load Design (SLD), which is commonly used by engineers in our country today.
The researcher made use of Excel program to optimize the best possible design of a steel section, which takes place in a fast, accurate and efficient manner. Furthermore, the Excel program offers a degree of flexibility since it covers variations in loadings, spans, sections, material properties and others and can be used as a ready reference.
This study is very timely since the Association of Structural Engineers of the Philippines (ASEP) had adopted the AASHTO LRFD Code. The NSCP Volume 2 for bridges had recently released. Hence, there is an urgent need for bridge engineers to familiarize themselves with this new AASHTO LRFD Code.
To simplify this study, it will only show computations for a 6m simple span plate girder superstructure bridge. |
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