By Eric B. Williamson, National Research Council (U.S.). Transportation Research Board, National Cooperative Highway Research Program, American Association of State Highway and Transportation Officials, United States. Federal Highway Administration
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Extra info for Blast-resistant highway bridges: design and detailing guidelines
The origin, accuracy, and applicability of the data used in these methods, however, may be difficult to verify. Given that possibility, the guidelines presented in this document emphasize pure first-principle structural analysis methods over combined procedures, but an analyst should understand that legitimate techniques based on, or corrected by, legitimate empirical data are preferable over pure firstprinciple methods at all times. Most blast-analysis programs separate the calculation of blast-wave propagation effects from the determination of structural response.
Differences between blast-resistant building and bridge design: a) UT Performing Arts Center, b) I-35 bridge near Town Lake. 3 Current and Past Research on Highway Bridges Although the field of bridges subjected to blast loads is relatively new, some past and current research focuses on the development of design guidelines and analytical models for various bridge components subjected to these types of loads. While this effort within the open structural engineering community is in its infancy, these studies provide a good foundation on which to base the work presented in this report.
Due to the large uncertainty associated with determining blast loads, an SDOF analysis usually provides adequate results for design. 34 Table 7. State DOT column design summary. Column Geometry State Bent Type Shape CA CO CT DE FL IL ND NJ NY SC TX AASHTO Single S/M Multi S/M Multi S/M S/M Multi Single Multi O/Re Round Round Ro/Re Ro/Re Ro/Re Round Ro/Re O/Ro Ro/Re State CA CO CT DE FL IL ND NJ NY SC TX AASHTO Min. Diam. ) F D 2 2 3 2 3 2 3600 4000 4000 4500 3000 AE A HP/ A 4000 3600 4000 Long.
Blast-resistant highway bridges: design and detailing guidelines by Eric B. Williamson, National Research Council (U.S.). Transportation Research Board, National Cooperative Highway Research Program, American Association of State Highway and Transportation Officials, United States. Federal Highway Administration