01365754

Component

https://doi.org/10.3141/2313-04

http://scholar.google.com...ligh&publication_year=2012

The Texas Department of Transportation commonly builds bridge spans with adjacently framed, prestressed box beams and slab beams and makes them composite with a 5-in.-thick, concrete, cast-in-place deck (CIPD). The presence of a cast-in-place, concrete overlay allows use of more favorable empirical, live-load distribution equations, which results in more efficient bridge spans. This 5-in.-thick CIPD offers limited depth for anchorage of rail reinforcement. "AASHTO LRFD Bridge Design Specifications" has a limiting hook development length of 6 in. for a No. 4 rail anchorage. With a 5-in. deck thickness and a 6-in. minimum required development length, the rail anchorage reinforcement must be cast in the pretensioned beams to meet specification requirements for rail anchorage strength. This need has made it difficult to ensure adequate development of the rail anchorage reinforcement. The objective of the study reported here, therefore, was to develop barrier anchorage details that would meet the "AASHTO Manual for Assessing Safety Hardware" (MASH) evaluation criteria, minimize damage to the concrete barrier profile and CIPD, and prevent delamination of the CIPD from the precast beams, which was witnessed in a research project performed at Texas Transportation Institute. The anchorage modifications were evaluated successfully under the MASH Test 3-11 and were considered suitable for roadways with traffic conditions appropriate for Testing Level 3 safety hardware.

01472280

12-3973

English

pp 33–41

2012

Transportation Research Record: Journal of the Transportation Research Board

9780309263115

Print

Figures; Photos; References; Tables

Anchorages; Beams; Bridge decks; Bridge railings; Cast in place concrete; Material reinforcement; Prestressed concrete

AASHTO LRFD Bridge Design Specifications; AASHTO Manual for Assessing Safety Hardware

Concrete barriers

Texas

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

TRIS, TRB, ATRI

Feb 8 2012 5:20PM

• Acoustic Emission Method for Real-Time Detection of Steel Fatigue Crack in Eyebar
• Analytic Hierarchy Process to Improve Simple Bridge Security Checklist
• Behavior and Performance of Fiber-Reinforced Polymer-to-Steel Bond
• Cost-Efficient and Innovative Design for Bridge Approach Slab
• Deterioration Models for Life-Cycle Cost Analysis of Bridge Decks in Nebraska
• Discrete Shear Connection for a Portable Composite Bridge
• Effect of Bearing Pad Arrangement on Capacity of Slab Panel Bridge Members
• Effect of Substructure Stiffness on Performance of Steel Integral Abutment Bridges Under Thermal Loads
• Evaluation of Cracks in a Spliced, Prestressed Concrete I-Girder Bridge
• Experimental and Numerical Study of Cable Anchorage for Cable-Supported Bridge
• Fluid Jackets: New Concept to Enhance Structural Performance of Buried Concrete Pipes
• Impact Forces from Heavy-Vehicle Collisions with Bridge Piers
• Implementation of Structural Health Monitoring for Movable Bridges
• Live Load Distribution of Hybrid Fiber-Reinforced Polymer Composite Superstructure on the Basis of Field Test
• Need for Bridge Monitoring Systems to Counter Railroad Bridge Service Interruptions
• Performance of Steel Fiber–Reinforced Concrete Pipes
• Probabilistic Evaluation to Improve Design of Impact–Echo Sources
• Understanding and Detecting Bridge Deck Deterioration with Ground-Penetrating Radar
• Use of Strain Data to Estimate Remaining Fatigue Life of a Fracture-Critical Bridge
• Use of Synthetic, Fiber-Reinforced, Initial Shotcrete Lining at Devil’s Slide Tunnel Project in California