IDM-23 Load and Resistance Factor Design (LRFD) Methodology for Bridges
DescriptionCalifornia agencies are required to adopt the AASHTO load-and-resistance factor design (LRFD) specifications plus the California Amendments for design of all new bridges. This 2-day course provides practical training to bridge design engineers and technicians on the application of the AASHTO LRFD specifications plus the California Amendments to the design of concrete bridges that are common in California (cast-in place box girdle, slab, pre-cast, and box culvert bridges). All structural components of bridges are covered; but retaining walls and the geotechnical design of deep foundations are not. This course emphasizes various technical design aspects that are affected by the newly adopted LRFD bridge design specifications plus the California Amendments, so that a more uniform level of safety for bridges can be achieved. This course is a hands-on training that combines lectures, class exercises on real-world bridge design problems, class discussions, and Q&A. Various bridge design examples utilizing the new LRFD specifications plus California Amendments are highlighted throughout the training.
- Changes in bridge design specifications relative to existing specifications
- LRFD design approach
- limit states (serviceability, strength, extreme condition, and fatigue & fracture limit states)
- permanent and live loading
- live load distribution
- structure analysis
- concrete design (flexure, shear, strut and tie models)
- pre-stressed concrete
- design problems and examples
Who Should AttendThis course is designed for bridge engineers and technicians from California agencies and the private sector, who wish to understand how the LRFD specifications achieve a uniform and accepted level of bridge safety, and how to appropriately use the LRFD specifications plus the California Amendments for bridge design.
RequirementsStudents should bring a calculator and pencil for in class problems.
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