Since the mid 1980s, Iowa State University has had an active timber bridge program which has included research, college courses, and extension activities.
Membership in CAWS
In 2003 the Bridge Engineering Center and Iowa State University joined the Coalition for Advanced Wood Structures (CAWS), a coalition of universities, industry, and the United States Department of Agriculture’s Forest Products Laboratory. This partnership will facilitate research that advances the use of timber products. The Bridge Engineering Center is the coalition's leader on the use of timber in transportation.
Iowa State University's Department of Civil, Construction, and Environmental Engineering (CCEE) offers an undergraduate/graduate timber design course. Timber bridge design has also been taught as one component of the undergraduate/graduate structural engineering capstone design course. In addition, a three-credit independent study course that focuses on timber bridge design has been regularly offered in the summer during the past five years.
The CCEE Department has a long history of civil engineering extension for engineering practitioners in the transportation area. The BEC staff have participated in extension bridge engineering workshops in the past that have also included timber bridge design and rating modules. Several research projects that focused on timber bridge alternatives for bridge replacement have produced design manual information and software.
Timber Bridge Research Program
The BEC has been involved in timber bridge research since the 1980s. The research has included the development of timber bridge specifications for the AASHTO Design Specifications as well as considerable field testing and evaluation of both highway and railroad bridges. The staff also contributed to the development of timber bridge technical publications and technical presentations that have resulted from the research. Links to project summaries are provided below (with most recent listed first):
- Literature Review and Assessment of Nanotechnology for Sensing of Timber Transportation Structures
- Implementation and Evaluation of Smart Timber Bridge Concepts to Provide Continuous Structural Condition Assessment
- Field Evaluation of Timber Preservation Treatments for Iowa Highway Applications (IHRB-05-10)
- Evaluation of a Timber Bridge for the Secondary Road System Using FRP Reinforced Glulam Girders
- Remote Monitoring of Historic Covered Timber Bridges in Madison County for the Prevention of Arson and Vandalism
- Development and Implementation of Design Recommendations for the Minimization of Timber Deck Panel Differential Deflection
- Evaluation of the Effectiveness of Glued Laminated Helper Stringers
- Development of Acceptable Live Load Deflection Criteria for Various Timber Superstructure and Deck Types
- Maintenance, Repair, and Rehabilitation of Low Volume Road Bridges
- Development of Bridge Load Testing for Load Evaluation (TR-445)
- Development of Modeling Preprocessors and Postprocessors for Evaluation of Timber Bridges
- Field Testing and Evaluation of Three Rehabilitated Timber Railroad Bridges
- Dynamic Performance of Timber Bridges
- Research Needs Study for Wood Transportation Structures
- Development of Design Criteria for Longitudinal Glued Laminated Timber Deck Bridges
- Behavior of Longitudinal Glued Laminated Timber Deck Bridges
*To read pdf files, you may need to download the free Adobe Acrobat Reader
2711 S. Loop Drive, Suite 4700, Ames, Iowa 50010-8664
Phone: 515-294-9501 ~ Fax: 515-294-0467
The Bridge Engineering Center is administered by Iowa State University's Institute for Transportation.
Copyright © 2007–2009, Iowa State University. All rights reserved.