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Abstract

Recent studies quantified the increase in load-carrying capacity of bridges by 45% due to the presence of concrete railings. These railings are subject to deterioration due to accidents. This parametric study quantifies the effect of railing deterioration and its impact on load-carrying capacity of bridges. A total of 112 bridge cases were analyzed using finite element analysis (FEA). The FEA results for slab moments were calculated and compared to reference cases and AASHTO procedures. FEA moments for bridge cases with one railing fully deteriorated compared well with AASHTO, with the exception of one-lane bridges where the overestimation by AASHTO reaches 20% for 1 ft deteriorated length, and decreased to 10% as the deterioration length increased to 8 ft. Railing deteriorations also changed FEA edge moments significantly by underestimating moments by 40% for two-lane bridges. This research can help engineers quantify the effect of railings on load carrying capacity of bridges.

Keywords

Concrete slab bridges railing deterioration finite-element analysis AASHTO procedures load-carrying capacity wheel load distribution

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References

AASHTO. Standard Specifications for Highway Bridges (17th ed). American Association of State Highway and Transportation Officials (AASHTO), Washington, DC. 2002.

AASHTO. LRFD Bridge Design Specifications (5th ed). American Association of State Highway and Transportation Officials (AASHTO), Washington, DC. 2012.

Abou Nouh

, Fawaz

, Mabsout

, Tarhini

. Influence of railings stiffness on wheel load distribution in one- and two-lane concrete slab bridges. International Journal of GEOMATE. 2017;12(33):134–38. GEOMATE International Society.

Akinci

, Liu

, Bowman

. Parapet strength and contribution to live load response for super load passages. Journal of Bridge Engineering. 2008;13(1):55–63. American Society of Civil Engineers (ASCE).

Chung

, Liu

, Sotelino

. Influence of secondary elements and deck cracking on the lateral load distribution of steel girder bridges. Journal of Bridge Engineering. 2006;11(2):178–87. American Society of Civil Engineers (ASCE).

Conner

, Huo

. Influence of parapets and aspect ratio on live-load distribution. Journal of Bridge Engineering. 2006;11(2):188–96. American Society of Civil Engineers (ASCE).

Eamon

, Nowak

. Effects of edge-stiffening elements and diaphragms on bridge resistance and load distribution. Journal of Bridge Engineering. 2002;7(5):258–66. American Society of Civil Engineers (ASCE).

Fawaz

, Waked

, Mabsout

, Tarhini

. Influence of railings on load carrying capacity of concrete slab bridges. Bridge Structures. 2017;12(3-4):85–96. IOS Press.

Jaber

, Mabsout

, Tarhini

. Influence of railing stiffness on wheel load distribution in two-span concrete slab bridges. Proceedings of the Interdependence Between Structural Engineering and Construction Management (ISEC) Conference, May 2019. Chicago, IL: ISEC.

10.

Mabsout

, Tarhini

, Frederick

, Kobrosly

. Influence of sidewalks and railings on wheel load distribution in steel girder highway bridges. Journal of Bridge Engineering. 1997;2(3):88–96. American Society of Civil Engineers (ASCE).

11.

Mabsout

, Tarhini

, Jabakhanji

, Awwad

. Wheel load distribution in simply supported concrete slab bridges. Journal of Bridge Engineering. 2004;9(2):147–55. American Society of Civil Engineers (ASCE).

12.

SAP2000 (version 19). Computers and Structures Inc. Berkeley, California.