Linear and Nonlinear Finite Element Analyses of RC Skewed Slab Bridges with Integral Wall Abutments

by J. A. Kankam, Univ of Maine, Orono, United States,
H. Dagher, Univ of Maine, Orono, United States,



Document Type: Proceeding Paper

Part of: Structural Engineering in Natural Hazards Mitigation

Abstract:

The design of rigid-frame skewed slab bridges is complicated by higher shears and moments near the obtuse corner (see Fig.1). While the finite element method can be used to compute these values, it is time consuming for everyday design. There is therefore a need for simplified methods of determining design moments and shears. A linear elastic finite element analysis was used to investigate the effects of various loads on twenty different bridges with spans ranging from 4.6m to 18.3m and skew angles varying from 0 to 60 degrees. The results of the study were used to produce design charts which account for the effects of skew. In the second stage of the research, the results of the linear analysis were verified and refined through nonlinear analysis and laboratory testing of concrete models. The nonlinear analysis was conducted with NARCOS, a Program developed at The University of Maine.

Subject Headings: Concrete bridges | Finite element method | Reinforced concrete | Bridge abutments | Linear analysis | Skewness | Concrete slabs

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