01151024

Component

https://doi.org/10.3141/2172-06

http://scholar.google.com...iams&publication_year=2010

The Roy B. Inks steel truss bridge (listed in the National Register of Historic Places) over the Llano River in Llano, Texas, is approximately 794 ft in length with a posted speed limit of 40 mph. This bridge design is common to many of the historic bridges in the state. The bridge railing does not meet the current safety requirements of NCHRP Report 350: "Recommended Procedures for the Safety Performance Evaluation of Highway Features" (NCHRP Report 350) for Test Level 2 (TL-2). The railing used is attached directly to steel truss members. On the basis of structural analyses, many of these members are not adequate to resist TL-2 crash forces. The purpose of this research was to develop a retrofit bridge railing design that is crashworthy with respect to NCHRP Report 350 requirements and a design that can be used on similar historic steel bridges within Texas. Crushable pipe blockouts located between the new retrofit rail and the truss members were developed as part of this research and were used to minimize the crash forces transmitted to the steel truss members. The new rail design retains the historic appearance of the bridge. The retrofit rail design, along with a rail expansion joint developed for this project, was successfully crash tested with respect to NCHRP Report 350 TL-3 requirements. The results of this research, the new bridge rail design, and the crash test results for the new design are presented.

01322901

10-3180

English

pp 47-55

2010

Transportation Research Record: Journal of the Transportation Research Board

9780309160414

Print

Figures (8) ; Photos (10) ; References (6)

Bridge design; Bridge railings; Crash tests; Crashworthiness; Historic bridges; Retrofitting; Steel bridges; Structural analysis; Truss bridges

NCHRP Report 350

Texas

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

TRIS, TRB, ATRI

Jan 25 2010 11:34AM

• Bond and Anchorage of High-Strength Reinforcing Steel
• Bridge Structural Health–Monitoring System Using Statistical Control Chart Analysis
• Condition Assessment of Bill Emerson Memorial Cable-Stayed Bridge Under Postulated Design Earthquake
• Convenient Method for On-Site Check of Single Steel I-Girder Stability During Erection
• Crack Detectability and Durability of Coaxial Cable Sensors in Reinforced Concrete Bridge Applications
• Design and Application of Large-Scale Cast-Steel Joints for Special-Shape Bridges
• Design Fatigue Load of Sign Support Structures Due to Truck-Induced Wind Gust
• Dynamic Amplification of Pier Column Internal Forces Due to Barge–Bridge Collision
• Effect of Bedding Thickness on Behavior of Rigid Pipes as Determined by Using Numerical Crack Modeling
• Effect of Fiber-Reinforced Polymer Configuration on Reliability of Flexurally Strengthened Concrete Beams (With Discussion and Closure)
• Effective Repair Grouting Methods and Materials for Filling Voids in External Posttensioned Tendons
• Field Testing and Performance Evaluation of Through-Plate Girder Railway Bridge
• Flexural Behavior and Design with High-Strength Bars and Bars Without a Well-Defined Yield Point
• In-Service Shear and Moment Girder Distribution Factors in Simple-Span Prestressed Concrete Girder Bridge: Measured with Built-in Optical Fiber Sensor System
• Inspection of Voids in External Tendons of Posttensioned Bridges
• Methodology to Evaluate Oxidation Degradation of High-Density Polyethylene Corrugated Pipe Resin
• Rationally Designed Staged Posttensioning to Abate Reflective Cracking on Side-by-Side Box-Beam Bridge Decks
• Review and Assessment of Fire Hazard in Bridges
• Seismic Design and Analysis of Buried Structures with CANDE-2007
• Shear Stiffness of Neoprene Bearing Pads Under Long-Term Loads
• Simplified Erection Guidelines for Double I-Girder Systems During Bridge Construction