Determine the Impact of the AASHTO LRFD Bridge Code and Transition the Department into the Use of the AASHTO LRFD Design Code

11152052004PDFTech ReportRC-1457AIDS Contract No. 95-0242Bridge designDesign standardsCoding systemsLoad and resistance factor designbridgesLRFDdesign codelimit statesload and resistance factorsAASHTOMinnesotaUnited StatesMichigan. Dept. of Transportation. Construction and Technology DivisionNowak, Andrzej S.Naaman, Antoine E.El-Tawil, SherifVarma, AmitBurgueno, RigobertoSzerszen, Maria M.Michalowski, RadoslawUniversity of MichiganMichigan. Dept. of TransportationUS Transportation CollectionState DOT\u2019s are expected to use the new AASHTO LRFD bridge design code by 2007. There are many considerable differences between the AASHTO Standard Specifications and AASHTO LRFD Code, including the reliability-based limit state approach, new live load and dynamic load, methods of analysis, design of deck slabs, unified approach to reinforced concrete and prestressed concrete design, and shear design for concrete. There is a need for the review of the current Michigan bridge design practice and identification of differences between it and LRFD code. Therefore, the main objective of the project is the development of the training program for MDOT technical staff and consultants. The tasks involved preparation of handout materials, presentations, and design examples. The training program was carried out in two series of five workshops. The workshops covered the following areas: loads and load distribution, slab design, prestressed concrete design, steel design, and design of abutments and piers. Each workshop was planned for two days. The instructors were faculty members at the University of Michigan and Michigan State University.75