橋梁畢業(yè)設(shè)計(jì)外文翻譯--碳纖維復(fù)合材料修復(fù)混凝土橋梁結(jié)構(gòu)的詳述及應(yīng)用(已修改)
2025-05-31 13:37 本頁(yè)面
【正文】 1 Structural Rehabilitation of Concrete Bridges with CFRP CompositesPractical Details and Applications Riyad S. ABOUTAHA1, and Nuttawat CHUTARAT2 ABSTRACT: Many old existing bridges are still active in the various highway transportation works, carrying heavier and faster trucks, in all kinds of environments. Water, salt, and wind have caused damage to these old bridges, and scarcity of maintenance funds has aggravated their conditions. One attempt to restore the original condition。 and to extend the service life of concrete bridges is by the use of carbon fiber reinforced polymer (CFRP) posites. There appear to be very limited guides on repair of deteriorated concrete bridges with CFRP posites. In this paper, guidelines for nondestructive evaluation (NDE), nondestructive testing (NDT), and rehabilitation of deteriorated concrete bridges with CFRP posites are presented. The effect of detailing on ductility and behavior of CFRP strengthened concrete bridges are also discussed and presented. KEYWORDS: Concrete deterioration, corrosion of steel, bridge rehabilitation, CFRP posites. 1 Introduction There are several destructive external environmental factors that limit the service life of bridges. These factors include but not limited to chemical attacks, corrosion of reinforcing steel bars, carbonation of concrete, and chemical reaction of aggregate. If bridges were not well maintained, these factors may lead to a structural deficiency, which reduces the margin of safety, and may result in structural failure. In order to rehabilitate and/or strengthen deteriorated existing bridges, thorough evaluation should be conducted. The purpose of the evaluation is to assess the actual condition of any existing bridge, and generally to examine the remaining strength and load carry capacity of the bridge. 1 Associate Professor, Syracuse University, . 2 Lecturer, Sripatum University, Thailand. One attempt to restore the original condition, and to extend the service life of concrete bridges is by the use of carbon fiber reinforced polymer (CFRP) posites. In North America, Europe and Japan, CFRP has been extensively investigated and 2 applied. Several design guides have been developed for strengthening of concrete bridges with CFRP posites. However, there appear to be very limited guides on repair of deteriorated concrete bridges with CFRP posites. This paper presents guidelines for repair of deteriorated concrete bridges, along with proper detailing. Evaluation, nondestructive testing, and rehabilitation of deteriorated concrete bridges with CFRP posites are presented. Successful application of CFRP posites requires good detailing as the forces developed in the CFRP sheets are transferred by bond at the concreteCFRP interface. The effect of detailing on ductility and behavior of CFRP strengthened concrete bridges will also b
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