On February 20, 2015, TRB’s Long-Term Bridge Performance (LTBP) Committee sent its fifth letter report to Gregory Nadeau, acting administrator of the Federal Highway Administration (FHWA). The committee provides advice and assistance on the conduct of the LTBP program, which is designed to collect research-quality data on a large representative sample of in-service U.S. highway bridges and to…
The U.S. Department of Transportation’s Office of Inspector General has released a report that details the U.S. Federal Highway Administration’s (FHWA’s) efforts to improve bridge safety. Read the Bridge Safety Report
The Ohio Department of Transportation has released a report that discusses the cracking behavior of continuous span structural slab bridges in order to address bridge deck cracking issues and the service life of concrete bridges. Read the Report
The Louisiana Department of Transportation and Development has released a report that documents the causes of biodeterioration of concrete surfaces and practices implemented to prevent and clean biofilm. Read the Report
The Ohio Department of Transportation has released a report that investigates the applicability of vertical column support systems to improve subgrade and reduce settlements for existing roadways in Ohio. Read the Report
The Institute for Transportation at Iowa State University has released a report that investigates the difference in bond strength and development length between galvanized reinforcing steel and epoxy-coated bars. Read the Report
The Minnesota Department of Transportation has released a report that investigates time- and temperature-dependent behavior of post-tensioned concrete bridges. Read the Report
The Florida Department of Transportation has released a report that describes a micro-structural evaluation of 50W weathering steel on bridges so as to understand and characterize the effect of the scribe markings on micro-structural evolution and mechanical properties. Read the Report
The Mountain-Plains Consortium at Colorado State University has released a report that documents and assesses the role of building information modeling (BIM) implementation for use in infrastructure asset management. Read the Report
The Center for Transportation Research at the University of Texas at Austin has released a report that provides an overview of an instrumentation program conducted on the world’s first precast network arch bridge. Read the Report
The Virginia Department of Transportation has released a report that develops and validates structural design guidelines and details for concrete bridge decks with corrosion-resistant reinforcing bars. Read the Report
The Institute for Transportation at Iowa State University has released a report that describes the development of a web-based project management system for bridge construction as part of the Iowa Department of Transportation’s construction administration system. Read the Report
The Florida Department of Transportation has released a report that explains a sensor concept that could be used for detection of active corrosion in post-tensioned tendons used in segmentally constructed bridges. Read the Report
The U.S. Federal Highway Administration has released a report that explains the potential of using ultra-high performance concrete-class materials to anchor or lap splice deformed reinforcing bars in field-cast connections as a means to simplify connection details in some prefabricated bridge systems. Read the Report
The U.S. Federal Highway Administration has released a tech brief that provides rating guidance on both bridge load and bridge resistance factor rating philosophies. Read the Tech Brief
The Oregon Department of Transportation has released a report that assesses the behavior of circular reinforced-concrete bridge columns constructed with Grade 80 reinforcing steel meeting ASTM A706 specifications subjected to reversed cyclic lateral loading. Read the Report
The U.S. Federal Highway Administration has released a report that develops design guidance for mitigation of excessive cable vibrations on cable-stayed bridges. The study includes wind tunnel testing to evaluate the influence of damping, turbulence, and aerodynamic surface treatment on cable stability. Read the Report
TRB’s National Cooperative Highway Research Program (NCHRP) Report 782: Proposed Guideline for Reliability-Based Bridge Inspection Practices presents a proposed guideline for reliability-based bridge inspection practices and provides two case studies of the application of the proposed guideline. The guideline describes a methodology to develop a risk-based approach for determining the bridge inspection interval according to the requirements in Moving…
The U.S. Federal Highway Administration has released a report that supplements the existing knowledge base on stay cable vibrations and explains possible recommendations that may be incorporated into design guidelines. Read the Report
Austroads has released a report that demonstrates the development of an assessment framework to allow fast assessment of simply supported bridges by using a simple line model comparison approach. This report is available for no fee after logging on to the site. Read the Report
The University of Illinois Center for Transportation has released a report that describes a dynamic load test program intended to improve the design of driven piling, which includes steel H-piles and closed-ended pipe piles. Read the Report
The Ohio Department of Transportation has released a report that describes a method for the overall condition assessment and load rating of prestressed box beam bridges based on their dynamic response collected through wireless sensor networks. Read the Report
AASHTO Journal, 29 August 2014 The Federal Highway Administration has made progress toward fully implementing safety provisions included in the 2012 MAP-21 surface transportation bill but the agency has much more to do, according to a new Office of Inspector General report released this week. According to the report, which was requested by House Transportation and Infrastructure Ranking Member…
TRB’s National Cooperative Highway Research Program (NCHRP) Innovations Deserving Exploratory Analysis (IDEA) Final Report for NCHRP-IDEA Project 161:Tools for Determining Yield Stress of In-Service Gusset Plates explores a nondestructive testing device that can estimate the yield stress of bridge steel plates. Project: Project Information Project Number: 20-30/IDEA 161 Read the Report
The Missouri Department of Transportation has released a report that investigates the in-service behavior of hybrid composite beam bridges through quality control/quality assurance measures. Read the Report
TRB’s second Strategic Highway Research Program (SHRP 2) S2-R04-RR-1: Innovative Bridge Designs for Rapid Renewal documents the development of standardized approaches to designing and constructing complete bridge systems for rapid renewals. The report also describes a demonstration project on US 6 over the Keg Creek near Council Bluffs, Iowa that was completed in 2011 using the accelerated bridge construction…
AASHTO Journal, 8 August 2014 The well-publicized collapse of an interstate bridge north of Seattle last year was the result of “a series of deficiencies in a system intended to safeguard the passage of oversized loads over Washington State’s roadways” according to the National Transportation Safety Board, which released its final report on the incident last month. A truck…
The New Zealand Transport Agency has released a report that identifies procedures for designing bridges located on sites that are prone to liquefaction and lateral spreading. Read the Report
The Florida Department of Transportation has released a report that validates a barge-impact load prediction model for facilitating the design of bridges that can resist collisions by errant waterway vessels. Read the Report
The U.S. Federal Highway Administration (FHWA) has released a report that determines chloride threshold values of post-tensioning strands that are exposed to chloride-contaminated grout on bridges. Read the Report
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