United States Department of Transportation
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Synthesis of Service Life Prediction for Bridges in Texas: Final Report
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2019-03-01
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[PDF-5.33 MB]
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Edition:Sept 1, 2016 – Sept 30 2017
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Abstract:In procurement requirements for design-build project contracts for bridge structures, the Texas Department of Transportation (TxDOT) may implement a 100-year service life requirement. However, there are no indicated measures or any technical recommendations that provide directions to satisfy the given requirement of service life. In addition, TxDOT and consultants use TxDOT recommendations for durability to improve performance during service life of design-bid-build and design-build projects but no quantitative methods or codified guidance is available to validate how the enhanced service life requirements are met. Further, the state of Texas has large number of existing old bridge thus the evaluation of the remaining service life of these bridges is a very important economic issue for TxDOT. The replacement of all these bridges is not possible since the available financial resources are limited. Therefore, it is very essential to prioritize the repair works based on the estimated remaining service life. As a result, this research study has been conducted to obtain information about state-of-the-art and state-of practice of bridge service life prediction. The research team gathered and analyzed the relevant information on various topics related to service life prediction which can be utilized as guidelines while dealing with the determination of service life of old as well as new bridges. The extensive literature survey conducted by the research team provides valuable information for TxDOT which can be helpful for service life prediction of bridges in the state of Texas. By utilizing the collected information under the scope of the project, the following benefits can be achieved: (1) This project would provide guidance on managing available funds efficiently for the required repair activities using the data on condition of the bridges. (2) The review of the available information obtained from different sources would provide better understanding of various deterioration models used for predicting service life, inspection checks and methods, maintenance practices and rehabilitation or replacement requirements for bridges, and would enhance the knowledge on achieving and extending the service life of bridges in Texas. (3) The output from this research project would be beneficial for maintaining the existing bridges in a good condition, improving their service life to make them economically efficient and determining strategies to achieve design service life for newly constructed bridges.
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