A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Finite Element Analysis of Concrete Slab Bridges
This paper presents the results of an investigation of wheel load distribution in reinforced concrete slab bridges. The finite element method was used to investigate the effect of span length, slab width, and wheel load conditions on simply supported, one-span, reinforced concrete slab bridges. The concrete slab was modeled using rectangular SHELL elements. Element sizes of 1 ft x 1 ft (0.3m x 0.3m) were selected to model all the slab bridges. This paper presents the finite element results of one-, two-, three-, and four-lane bridges. The lane width considered in this research is 12 ft (3.6m). Four typical span lengths were considered in this study: 24 ft, 36 ft, 46 ft, and 54 ft (7.2, 10.8, 13.8, and 16.2m). Two possible loading conditions were investigated: (a) design trucks assumed to be traveling in the center of each lane and (b) the design trucks were placed close to one edge of the slab with a minimum spacing between the trucks. The FEA results for bridges subjected to wheel loading placed to one edge of the slab showed that the AASHTO procedure over-estimates the bending moment by 30% for one-lane and span length less than 25 ft (7.5m). As the span length increases (30 ft to 55 ft) for one-lane bridges, the AASHTO bending moment correlates well with the FEA results. The AASHTO bending moment gave similar results to the FEA when considering two-lane slab bridges and span length less than 25 ft (7.5m). However, as the span length increases for the two-lane bridges, reduction factor is applied to the FEA moments for two-lanes in combination with span length greater than 30 ft (9m). The results of this study validate the use of AASHTO design procedures in designing slab bridges. This paper will also assist bridge engineers in performing realistic design of simply supported, multi-lane, reinforced concrete slab bridges as well as evaluate the load carrying capacity of existing structures.
Finite Element Analysis of Concrete Slab Bridges
This paper presents the results of an investigation of wheel load distribution in reinforced concrete slab bridges. The finite element method was used to investigate the effect of span length, slab width, and wheel load conditions on simply supported, one-span, reinforced concrete slab bridges. The concrete slab was modeled using rectangular SHELL elements. Element sizes of 1 ft x 1 ft (0.3m x 0.3m) were selected to model all the slab bridges. This paper presents the finite element results of one-, two-, three-, and four-lane bridges. The lane width considered in this research is 12 ft (3.6m). Four typical span lengths were considered in this study: 24 ft, 36 ft, 46 ft, and 54 ft (7.2, 10.8, 13.8, and 16.2m). Two possible loading conditions were investigated: (a) design trucks assumed to be traveling in the center of each lane and (b) the design trucks were placed close to one edge of the slab with a minimum spacing between the trucks. The FEA results for bridges subjected to wheel loading placed to one edge of the slab showed that the AASHTO procedure over-estimates the bending moment by 30% for one-lane and span length less than 25 ft (7.5m). As the span length increases (30 ft to 55 ft) for one-lane bridges, the AASHTO bending moment correlates well with the FEA results. The AASHTO bending moment gave similar results to the FEA when considering two-lane slab bridges and span length less than 25 ft (7.5m). However, as the span length increases for the two-lane bridges, reduction factor is applied to the FEA moments for two-lanes in combination with span length greater than 30 ft (9m). The results of this study validate the use of AASHTO design procedures in designing slab bridges. This paper will also assist bridge engineers in performing realistic design of simply supported, multi-lane, reinforced concrete slab bridges as well as evaluate the load carrying capacity of existing structures.
Finite Element Analysis of Concrete Slab Bridges
Mabsout, M. (author) / Jabakhanji, R. (author) / Tarhini, Kassim (author) / Frederick, Gerald R. (author)
Eighth International Conference on Computing in Civil and Building Engineering (ICCCBE-VIII) ; 2000 ; Stanford, California, United States
2000-08-04
Conference paper
Electronic Resource
English
Finite Element Analysis of Concrete Slab Bridges
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