01340059

Component

https://doi.org/10.3141/2251-04

http://scholar.google.com...Boyd&publication_year=2011

The Florida Department of Transportation (DOT) has several bridges that were constructed in the early 1970s and use two parapet bridge railing systems that are combinations of metal and concrete. These railings use an aluminum post-and-rail system anchored to the top of a concrete parapet. Both systems are used on high-speed roadways. The rails are often damaged by vehicular crashes and nuisance hits. The damaged aluminum rail components are expensive to fabricate and replace. Rail 1 is 2 ft 9 in. high and uses a cast-aluminum post with a round-tube rail anchored to the top of a vertical concrete parapet. Rail 2 is 3 ft 3 in. high and uses a cast-aluminum post with a rectangular-tube rail anchored to the top of a concrete Jersey-shaped parapet. Both metal rails are anchored to the parapets by cast-in-place anchor bolts. This paper presents the designs and details of two retrofit steel railings that use adhesive anchoring systems. These new railing designs are less expensive and easier to repair than the aluminum post-and-rail system. The retrofit designs presented in this paper meet the strength requirements of Test Level 4 of NCHRP Report 350. Design information and full-scale strength testing data used to develop the Texas DOT T401 bridge rail were also used to design these two retrofit designs. These retrofit designs were successfully installed on six bridges in Florida (approximately 4,000 ft).

01361668

11-3990

English

pp 34-43

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309167710

Print

Figures (9) ; Photos (6) ; References (4)

Adhesives; Anchorages; Bridge design; Bridge railings; Concrete; Parapets; Retrofitting; Steel

Florida

Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls

TRIS, TRB, ATRI

Feb 17 2011 6:43PM

• Challenges of Skew in Bridges with Steel Girders
• Characterization of Strength and Durability of Ultra-High-Performance Concrete Under Variable Curing Conditions
• Controlled Low-Strength Material Used Around Buried Pipelines
• Evaluation of Load Rating and System Reliability of Movable Bridge
• Experimental and Analytical Evaluations of Confinement Reinforcement in Pretensioned Concrete Beams
• Fatigue Response in Bridge Deck Connection Composed of Field-Cast Ultra-High-Performance Concrete
• Nondestructive Detection of Delamination in Concrete Slabs: Multiple-Method Investigation
• Nonlinear, Effective-Stress Ground Motion Response Analyses Following AASHTO Specifications for Load and Resistance Factor Design Seismic Bridge Design
• Rebar Detection with Cover Meter and Ultrasonic Pulse Echo Combined with Automated Scanning System
• Reducing Fatigue in Wind-Excited Support Structures of Traffic Signals with Innovative Vibration Absorber
• Relationships of Barge Bow Force–Deformation for Bridge Design: Probabilistic Consideration of Oblique Impact Scenarios
• Seismic Retrofitting of Cruciform-Shaped Columns by Jacketing with Fiber-Reinforced Polymer
• Structural Behavior of Waffle Bridge Deck Panels and Connections of Precast Ultra-High-Performance Concrete: Experimental Evaluation
• Transfer and Development Lengths and Prestress Losses in Ultra-High-Performance Concrete Beams
• Vibration Versus Deflection Control for Bridges with High-Performance Steel Girders