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Accession Number PB2013-103239
Title Strut-and-Tie Model Design Examples for Bridges: Final Report.
Publication Date Jun 2012
Media Count 276p
Personal Author C. Williams D. Deschenes O. Bayrak
Abstract A series of five detailed design examples feature the application of state-of-the-art strut-and-tie modeling (STM) design recommendations. This guidebook is intended to serve as a designers primary reference material in the application of STM to bridge components. (1) Example 1: Five-Column Bent Cap of a Skewed Bridge This design example serves as an introduction to the application of strut-and-tie modeling. Challenges are introduced by the bridges skew and complicated loading pattern. A clear procedure for defining nodal geometries is presented. (2) Example 2: Cantilever Bent Cap A strut-and-tie model is developed to represent the flow of forces around a frame corner subjected to closing loads. This is accomplished, in part, through the design and detailing of a curved-bar node at the outside of the frame corner. (3) Example 3a: Inverted-T Straddle Bent Cap (Moment Frame) An inverted-T straddle bent cap is modeled as a component within a moment frame. Bottom-chord (ledge) loading of the inverted-T necessitates the use of local STMs to model the flow of forces through the bent caps cross section. (4) Example 3b: Inverted-T Straddle Bent Cap (Simply Supported) The inverted-T bent cap of Example 3a is designed as a simply supported member. Results for both the moment frame case and the simply supported case are compared to illustrate the influence of boundary condition assumptions. (5) Example 4: Drilled-Shaft Footing Three-dimensional STMs are developed to properly model the flow of forces through a deep drilled-shaft footing. Two unique load cases are considered to familiarize the designer with the development of such models.
Keywords Bent cap
Bridge components
Drilled-shaft footing
Skewed bridge
Strut-and-Tie Modeling(STM)

Source Agency Federal Highway Administration
Department of Transportation Office of University Research
NTIS Subject Category 50A - Highway Engineering
85H - Road Transportation
91B - Transportation & Traffic Planning
Corporate Author Texas Univ. at Austin. Center for Transportation Research.
Document Type Technical report
Title Note Technical rept.
NTIS Issue Number 1307
Contract Number N/A

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