A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Influence of railings on load carrying capacity of concrete slab bridges
This paper presents the results of a parametric study investigating the influence of railings on the load carrying capacity of simply-supported, one-span, multi-lane reinforced concrete slab bridges. A total of 112 bridge cases were modeled using finite element analysis (FEA) subject to AASHTO HS20 truck loadings positioned transversely and longitudinally to produce the maximum bending moments and deflections for cases with and without railings which were compared with AASHTO procedures. Placing two railings on the bridge, AASHTO Standard Specifications procedures overestimated the FEA moments by 100% for one-lane bridges, and by 20% for bridges with two or more lanes. AASHTO LRFD overestimated the FEA moments in all bridge cases by 150% for one-lane, 70% for two-lanes, and a 30% for three- and four-lanes when placing two railings on slab bridges. The results of this study support the AASHTO procedures in designing new concrete slab bridges. However, the paper can also assist engineers in modeling the actual bridge geometry using FEA to account for structural elements such as integral railings in resisting special permit loading on concrete slab bridges.
Influence of railings on load carrying capacity of concrete slab bridges
This paper presents the results of a parametric study investigating the influence of railings on the load carrying capacity of simply-supported, one-span, multi-lane reinforced concrete slab bridges. A total of 112 bridge cases were modeled using finite element analysis (FEA) subject to AASHTO HS20 truck loadings positioned transversely and longitudinally to produce the maximum bending moments and deflections for cases with and without railings which were compared with AASHTO procedures. Placing two railings on the bridge, AASHTO Standard Specifications procedures overestimated the FEA moments by 100% for one-lane bridges, and by 20% for bridges with two or more lanes. AASHTO LRFD overestimated the FEA moments in all bridge cases by 150% for one-lane, 70% for two-lanes, and a 30% for three- and four-lanes when placing two railings on slab bridges. The results of this study support the AASHTO procedures in designing new concrete slab bridges. However, the paper can also assist engineers in modeling the actual bridge geometry using FEA to account for structural elements such as integral railings in resisting special permit loading on concrete slab bridges.
Influence of railings on load carrying capacity of concrete slab bridges
Influence of railings on load carrying capacity
Fawaz, Ghassan (author) / Waked, Michel (author) / Mabsout, Mounir (author) / Tarhini, Kassim (author)
Bridge Structures ; 12 ; 85-96
2017-06-15
12 pages
Article (Journal)
Electronic Resource
English
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