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Author :
Release : 2002
Genre : Concrete bridges
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Rapid Strengthening of Reinforced Concrete Bridges by :
Download or read book Rapid Strengthening of Reinforced Concrete Bridges written by . This book was released on 2002. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Release : 2003
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Rapid Strengthening of Reinforced Concrete Bridges by :
Download or read book Rapid Strengthening of Reinforced Concrete Bridges written by . This book was released on 2003. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dushyant Arora
Release : 2003
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Rapid Strengthening of Reinforced Concrete Bridge with Mechanically Fastened - Fiber Reinforced Polymer Strips by : Dushyant Arora
Download or read book Rapid Strengthening of Reinforced Concrete Bridge with Mechanically Fastened - Fiber Reinforced Polymer Strips written by Dushyant Arora. This book was released on 2003. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Release : 2002
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Rapid Strengthening of Reinforced Concrete Beams with Mechanically Fastened, Fiber-Reinforced Polymeric Composite Materials by :
Download or read book Rapid Strengthening of Reinforced Concrete Beams with Mechanically Fastened, Fiber-Reinforced Polymeric Composite Materials written by . This book was released on 2002. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. military must often deploy to other countries where bridges may have insufficient strength for their heavy tactical vehicles. In recent years, fiber-reinforced polymeric (FRP) materials have emerged as a viable retrofit scheme for strengthening reinforced concrete bridges. However, because of stringent application requirements, long cure times, and climatic sensitivity, this technology has yet to prove feasible for military operations where time is often the most critical factor. Furthermore, Army operations are conducted under the broadest range of climatic conditions. For these reasons, the U.S. Army Engineer Research and Development Center has undertaken to develop a unique FRP application methodology utilizing powder-actuated mechanical fasteners (i.e., nails from a conventional carpenter's nail gun). This method shows great promise for military applications, since no substrate preparation or adhesive curing is required. Additionally, this method should work well in all but the most extreme environments. For this purpose, numerous laboratory tests have been conducted, and the results have been very promising. This report provides a detailed summary of the first 2 years of testing on this concept.
Author : Anna Beth Pridmore
Release : 2009
Genre :
Kind : eBook
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Book Synopsis Development of Composite Renewal Systems for Rapid Rehabilitation and Construction of Bridge Decks by : Anna Beth Pridmore
Download or read book Development of Composite Renewal Systems for Rapid Rehabilitation and Construction of Bridge Decks written by Anna Beth Pridmore. This book was released on 2009. Available in PDF, EPUB and Kindle. Book excerpt: The deterioration of steel in aging reinforced concrete bridges is a continual problem which could benefit from improved rehabilitation techniques that take advantage of enhanced and more durable materials such as fiber reinforced polymer (FRP) composites. Appropriately designed hybrid material systems benefit from the performance and durability advantages of FRP materials yet remain more cost effective than comparable all-composite systems. Development of rapid rehabilitation systems for the decks of concrete box girder bridges, which are increasingly common throughout the United States, is presented. One goal of this research is to assess and validate the use of FRP composite panels for use as both stay-in-place formwork and as the bottom longitudinal and transverse reinforcement in the deck of concrete box girder bridges. Performance assessments for full-scale two-cell box girder bridge specimens through monotonic and extensive cyclic loading provided validation for the FRP panel system bridge deck as a viable rehabilitation solution for box girder bridge decks. The FRP panel system performed comparably to a conventionally reinforced concrete bridge deck in terms of serviceability, deflection profiles, and system level structural interaction and performed superior to the RC bridge deck in terms of residual deflections, and structural response under cyclic loading. Assessment of a damaged FRP panel bridge deck system, which was repaired using a resin injection technique, showed superior performance for the repaired system in terms of integrity of the FRP panel interface and cyclic response. Rapid rehabilitation techniques for strengthening reinforced concrete box girder bridge deck overhangs using near-surface-mounted (NSM) carbon fiber reinforced polymer (CFRP) were also evaluated. Analytical predictions of load carrying capacity and deflections provided correlation with experimental results, and the developed analysis methods provide an effective design tool for future research. Results from the laboratory testing of a bridge deck overhang strengthened with FRP showed significant increases in load carrying capacity as well as deformation capacity as compared to the as-built specimen without FRP. This research provides enhanced understanding of hybrid structures and indicates significant potential for rehabilitation applications to concrete box girder bridges.
