On February 23, 2016, TRB’s Long-Term Bridge Performance (LTBP) Committee sent its sixth letter report to Gregory Nadeau, 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 analyze…
The World Road Association has released a report that describes how life-cycle analysis can be performed systematically, how system criteria can be used, how aggregation of criteria can be done, and how risk-based methods for system analysis can be applied. This report is available for no fee after logging onto the site. Read the Report
The Institute for Transportation at Iowa State University has released a report that evaluates several strip seal termination details to consider redesign possibilities on bridges’ strip seal expansion joints. Read the Report
The Florida Department of Transportation has released a report that conducts an experimental investigation to understand epoxy grout pourbacks’ failure mechanisms on bridges and provide guidance for eliminating failures. Read the Report
The Ohio Department of Transportation has released a report that explains the extent to which design changes and equipment may provide alternative ways of performing drainage trough cleaning on bridges, rather than from above or below the troughs. Read the Report
More than 48,000 bridges in the United States contain structural timber in the superstructure or substructure, according to the National Bridge Inventory (NBI) of December 2012. Approximately 2,000 of these timber bridges are located in Minnesota; many of these were built in the 1950s and 1960s and now may be experiencing some level of deterioration. Moisture in the…
The Upper Great Plains Transportation Institute at North Dakota State University has released a report that develops a comprehensive inspection methodology for assessing the safety of culverts and other short span structures. Read the Report
The Upper Great Plains Transportation Institute has released a report that presents the results of an experimental study on the fatigue performance of reinforced concrete beams strengthened with different externally bonded carbon fiber reinforced polymer systems. Read the Report
The Institute for Transportation at Iowa State University has released a report that reviews available rehabilitation alternatives and solutions to complete rapid rehabilitation projects. Read the Report
The Washington State Department of Transportation has released a report that discusses the design of the double wall pile and results from finite element modeling of the pile, scaled prototype testing, and full-scale field testing. Read the Report
TRB’s National Cooperative Research Board Program (NCHRP) has released a request for proposals to develop proposed AASHTO Load and Resistance Factor Design (LRFD) design guidelines for stainless steel girders for full-length girder bridges and end sections of A709 steel girders; and guidelines for stainless steel superstructure fabrication. Proposals are due February 23, 2016. Project: Project Information Read the RFP
The New Zealand Transportation Agency has released a report that provides a summary of current practices relating to the design and construction of its integral and semi-integral bridges. Read the Report
The Minnesota Department of Transportation has released a report that identifies inspection methods, manuals, training, and timetables for bridge owners, and how to use this new inspection process when determining its annual bridge projects. Read the Report
The Missouri Department of Transportation has released a report that describes development and implementation of infrared thermography, which is a nondestructive evaluation technology for the condition assessment of concrete bridge components. Read the Report
The Oregon Department of Transportation has released a report that characterizes flexural and compressional properties of the timber splice repair design and discerns any influence of concrete plug length on the performance of the piles. Read the Report
The U.S. Government Accountability Office has released a report that examines the current conditions of the nation’s bridges, as well as changes in bridge conditions that have occurred over the last 10 years. Read the Report
TRB’s National Cooperative Highway Research Program (NCHRP) latest Impacts on Practice explores a report that helped close the gaps between hydraulic predictions and the field experience of structural engineers by using a risk-based methodology. NCHRP Report 761: Reference Guide for Applying Risk and Reliability-Based Approaches for Bridge Scour Prediction, is now an important tool for bridge engineers to…
The World Road Association has released a report that describes results of an international survey in which countries were asked about the extent to which degradation problems affects different elements of their bridge structures, and select countries’ standard repair methods. This report is available for no fee after logging onto the site. Read the Report
The Iowa Department of Transportation has released a report that focuses on developing a framework for making asset management decisions on low-volume bridges in agricultural counties. Read the Report
TRB’s National Cooperative Highway Research Program (NCHRP) Report 816: Guide for the Preservation of Highway Tunnel Systems provides guidance on making informed decisions using an asset management process to support prioritization of highway tunnel preservation actions. The guide explains how executives can incorporate and communicate capital funding needs for tunnel improvements as part of their overall transportation system…
The Institute for Transportation at Iowa State University has released a report that outlines the use of social return on investment to gauge the socioeconomic impact of structurally deficient bridges in order to prioritize funding. Read the Report
TRB’s National Cooperative Highway Research Program (NCHRP) Innovations Deserving Exploratory Analysis (IDEA) program Report 158: The Stress State Identification of Critical Bridge Components Using Nonlinear Acoustics has released a report that examines the application of a nonlinear acoustics-based technique for identifying the stress state of critical highway bridge components through laboratory-scale and field testing. Read the Report E-Newsletter…
TRB’s National Cooperative Highway Research Program (NCHRP) Innovations Deserving Exploratory Analysis (IDEA) program Report 164: Laser Spectroscopy for Rapid Profiling of Steel Bridge Coating, Corrosion, and Heavy Metals has released a report that explores the development of laser-scanning technology that could provide direct measurement of the condition of bridge surfaces and undercoatings. The technology could assess the level…
TRB’s National Cooperative Highway Research Program (NCHRP) Innovations Deserving Exploratory Analysis (IDEA) program Report 158: The Stress State Identification of Critical Bridge Components Using Nonlinear Acoustics has released a report that examines developing and demonstrating the application of a nonlinear acoustics-based technique for identifying the stress state of critical highway bridge components through laboratory-scale and field testing. Read…
The Institute for Transportation at Iowa State University has released a report that investigates the Iowa Department of Transportation’s policy regarding the required amount of negative moment reinforcement that is necessary to provide the continuity over bridge decks. Read the Report
The Montana Department of Transportation has released a report that describes a static load test that was carried out on a new bridge by using Osterberg load cell technologies and procedures. This is a large file and may take a few minutes to load. Read the Report
The Institute for Transportation at Iowa State University has released a report that considers the effect of bridge width on deck cracking and other parameters including bridge skew, girder spacing, and abutment type. Read the Report
The Institute for Transportation at Iowa State University has released a report that evaluates the grouted coupler connection details utilized on precast concrete elements on one of Iowa’s bridges. Read the Report
The Mountain-Plains Consortium has released a report that attempts to quantify the parameters for common bridge nondestructive evaluation (NDE) methods as a means of implementing risk-based planning. Read the Report
The California Department of Transportation has released a report that compares seismic modeling results of two different software programs conducted on a sample of bridges classified as ordinary standards bridges, which are bridges that have characteristics including being less than 300 feet long and having soil not susceptible to liquefaction or scour. Read the Report
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