Download Free Experimental Evaluation Of Frp Strengthened Concrete Bridge Girders Book in PDF and EPUB Free Download. You can read online Experimental Evaluation Of Frp Strengthened Concrete Bridge Girders and write the review.

This report presents the details of research study on the use of Carbon Fiber Reinforced Polymers (CFRP) sheets to strengthen the Pre-stressed concrete TxDOT Tx-28 bridge girders in flexure and shear. Four girders were subjected to destructive test in this research. First girder as control specimen without any CFRP applied on it, Second and third girders were flexural strengthened for one and two layers of CFRP and the forth girder is shear strengthened with one layer CFRP. Experimental phases along with the comparison of test results in terms of flexural and shear capacity of bridge girders, strains and deflections are discussed with reference to control and CFRP strengthened specimens. The CFRP strengthening was designed based on the ACI 440 recommendations. The report details the installation process as well as a load-testing program utilized to assess the effectiveness of the strengthening system. The installation process was found to be rapid and simple. The bonding between the FRP installed and the concrete surface is verified by pull off test. Adding to this in order to monitor the strain and displacement, we had strain gages on the surface of FRP at the tension and compression zones of the girders and two transducers near the supports and two more transducers at the center. Good agreement was obtained with the experimental and theoretical findings of strength, strains and deflections. Overall, the strengthened girders behaved as predicted when subjected to the design loads. The detailed design of FRP strengthening is system is reported in this report.
TRB's National Cooperative Highway Research Program (NCHRP) Report 678: Design of FRP Systems for Strengthening Concrete Girders in Shear offers suggested design guidelines for concrete girders strengthened in shear using externally bonded Fiber-Reinforced Polymer (FRP) systems. The guidelines address the strengthening schemes and application of the FRP systems and their contribution to shear capacity of reinforced and prestressed concrete girders. The guidelines are supplemented by design examples to illustrate their use for concrete beams strengthened with different FRP systems. Appendix A of NCHRP Report 678, which contains the research agency's final report, provides further elaboration on the work performed in this project. Appendix A: Research Description and Findings, is only available online.
This study investigated the effectiveness of fiber-reinforced plastic on reinforced concrete and steel structures. Three types of carbon fiber-reinforced plastic (FRP) materials, Replark, 19, and Flat Carbon Vinyl (FCV) Ester plates, were tested to record changes in the behavior of concrete beams with the application of the plates. FRP performance was monitored initially under controlled laboratory conditions. A field study was then conducted on two bridges in Ohio. Strains and deflections in the concrete structures under a static load were measured both before and after the installation of the fiber-reinforced plastic plates.
Fiber-reinforced polymers (FRP) are newly used materials by structural engineers compared to concrete, steel, and wood. One area in which FRP is being used more and more is the strengthening of structurally deficient concrete bridges. FRP strengthening of the bridge girder improves flexural, shear, corrosion, seismic, and impact resistance. ACI 440 committee report outlined design procedure for flexure, shear, axial force, and combined axial and bending forces based on the available research, which are considered to be conservative and also pointed out the areas that still require research. Besides experimental, analytical, and field tests finite element analysis of FRP strengthened structural members is an important area of research. In this thesis, an AASHTO-type IV prestressed concrete girder was modeled using ANSYS 14.5 that was eventually strengthened with FRP for flexure and shear. Flexural and shear failure were studied for un-strengthened and strengthened girder, which was compared with theoretical values obtained via accepted methods of hand calculation. The results obtained from the finite element analysis demonstrate that FRP can be used as an effective strengthening technique.
TRB's National Cooperative Highway Research Program (NCHRP) Report 655: Recommended Guide Specification for the Design of Externally Bonded FRP Systems for Repair and Strengthening of Concrete Bridge Elements examines a recommended guide specification for the design of externally bonded Fiber-Reinforced Polymer (FRP) systems for the repair and strengthening of concrete bridge elements. The report addresses the design requirements for members subjected to different loading conditions including flexure, shear and torsion, and combined axial force and flexure. The recommended guide specification is supplemented by design examples to illustrate its use for different FRP strengthening applications.
Strengthening Design of Reinforced Concrete with FRP establishes the art and science of strengthening design of reinforced concrete with fiber-reinforced polymer (FRP) beyond the abstract nature of the design guidelines from Canada (ISIS Canada 2001), Europe (FIB Task Group 9.3 2001), and the United States (ACI 440.2R-08). Evolved from thorough cla
This book presents the analysis and design of fiber-reinforced polymer (FRP) bridge decks, which have been increasingly implemented in rehabilitation projects and new construction due to their reduced weight, lower maintenance costs, and enhanced durability. It compiles the necessary information, based primarily on research by the authors, to facilitate the development of standards and guidelines for using FRP decks in bridge designs. The book combines analytical models, numerical analyses, and experimental investigations, which can be applied to various design formulations. It also, for the first time, offers a complete set of design guidelines.
Vols. 29-30 contain papers of the International Engineering Congress, Chicago, 1893; v. 54, pts. A-F, papers of the International Engineering Congress, St. Louis, 1904.