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Title:

Design & Full Scale Testing of Texas Department of Transportation Type SSTR Single Slope Concrete Bridge Rail on Thin Pan-Formed Bridge Deck
Cover of Design & Full Scale Testing of Texas Department of Transportation Type SSTR Single Slope Concrete Bridge Rail on Thin Pan-Formed Bridge Deck

Accession Number:

01363742

Record Type:

Component

Abstract:

Pan-formed girders with bridge decks were developed in the late 1940s resulting from a need for low cost bridges in rural areas in Texas. Modular steel forms are used to construct the deck and bridge beams in a single pour and also serve to support the construction loads during construction. Up until 1988, approximately 3750 pan form girder bridges had been constructed on the Texas Highway System. Many of these bridges utilize a 6-inch thick deck with a narrow deck cantilever. Many of the bridge railings constructed on these bridges do not meet the current MASH crash requirements. The purpose of this project was to develop a crashworthy retrofit bridge rail that could be anchored on a 6-inch thick pan-formed bridge deck. For this project, the TXDOT Type SSTR concrete rail was retrofitted to the 6-inch thick pan-formed bridge deck. The rail is anchored to the concrete deck using bent anchor bolts that anchor (bolt through) to the 6-inch thick concrete deck. The concrete deck was constructed using 3000 psi concrete and a single layer of reinforcement. In addition, instead of conventional reinforcement, welded wire reinforcement was designed and used in the bridge rail. Analyses and details were developed to increase the strength of the barrier system at an open joint in the barrier and deck. The full-scale crash test performed on the retrofit barrier met all the requirements of MASH (1). This paper presents the analytical and full scale crash test results performed on the retrofit bridge rail design.

Supplemental Notes:

This paper was sponsored by TRB committee AFB20 Roadside Safety Design

Monograph Accession #:

01362476

Report/Paper Numbers:

12-4342

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Williams, William F
Holt, John

Pagination:

22p

Publication Date:

2012

Conference:

Transportation Research Board 91st Annual Meeting

Location: Washington DC, United States
Date: 2012-1-22 to 2012-1-26
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References

Geographic Terms:

Texas

Subject Areas:

Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls; I85: Safety Devices used in Transport Infrastructure

Source Data:

Transportation Research Board Annual Meeting 2012 Paper #12-4342

Files:

PRP, TRIS, TRB

Created Date:

Feb 8 2012 5:23PM