Bridges on Secondary Highway and Local Roads - Rehabilitation and Replacement

摘要

This report presents the results of a 21-month study that had four major objectives; namely, (1) to identify the common deficiencies found on bridges on secondary highways and local roads throughout the United States, (2) to evaluate feasible corrective procedures that have been successfully employed for these deficiencies, (3) to evaluate economical replacement systems for bridge structures for which repair or rehabilitation is not feasible, and (4) to develop a simple procedure to assist engineers in making decisions involving repair or replacement. Thirty-four procedures (repair, rehabilitation, and retrofitting) were found to correct a high percentage of the common bridge deficiencies. Twenty-seven bridge replacement systems were identified. With the exception of two of the four prefabricated steel bridges in System Number 5-1, all have been used successfully in the United States. The two exceptions noted have been used in Western Europe and are available in the United States. Each system meets one or more of the criteria of ease of construction, inexpensive construction, relatively short construction time, or long, useful life expectancy.