Download or read book Investigation of Integrity and Effectiveness of RC Bridge Deck Rehabilitation Using CFRP Composites written by Luke S. Lee and published by . This book was released on 2008 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Integrity and Effectiveness of RC Bridge Deck Rehabilitation with CFRP Composites written by Luke S. Lee and published by . This book was released on 2004 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Integrity and Effectiveness of Reinforced Concrete Bridge Deck Rehabilitated with Carbon Fiber Reinforced Polymer Composites written by Luke S. Lee and published by . This book was released on 2004 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Composite Renewal Systems for Rapid Rehabilitation and Construction of Bridge Decks written by Anna Beth Pridmore and published by . This book was released on 2009 with total page 379 pages. 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.

Download or read book Monitoring and Service Life Estimation of Reinforced Concrete Bridge Decks Rehabilitated with Externally Bonded Carbon Fiber Reinforced Polymer CFRP Composites written by Luke Soo-won Lee and published by . This book was released on 2005 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rethinking Sustainable Development written by Tan Yigitcanlar and published by IGI Global. This book was released on 2010-01-01 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book investigates the role of urban, regional and infrastructure planning in achieving sustainable urban and infrastructure development, providing insights into overcoming the consequences of unsustainable development"--Provided by publisher.

Download or read book Assessment of FRP Composite Strengthened Reinforced Concrete Structures at the Component and Systems Level Through Progressive Damage and Non destructive Evaluation written by Kumar Kanti Ghosh and published by . This book was released on 2006 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laboratory and Field Testing of FRP Composite Bridge Decks and FRP reinforced Concrete Bridge for City of St James Phelps County Mo written by Halvard Nystrom and published by . This book was released on 2002 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Strengthening Bridges Using Composite Materials written by Damian I. Kachlakev and published by . This book was released on 1998 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research project is to outline methodologies for using Fiber Reinforced Polymer (FRP) composites to strengthen and rehabilitate reinforced concrete bridge elements. Infrastructure deterioration and bridge strengthening techniques using FRP materials are discussed as background. Properties and classifications of different reinforcing fibers and resin matrices are provided, along with the mechanical properties of the FRP composites. Basic concepts and design principles for composite FRP materials are introduced, and topics such as manufacturing processes, anisotropic elasticity, strength of anisotropic materials, and micro-mechanics are presented. Techniques and concepts for strengthening concrete beams with FRP composites are discussed, as are flexural and shear strengthening design and construction methodologies. The worldwide research experience in the behavior of FRP strengthened beams under various conditions are summarized. External reinforcement of concrete columns using FRP materials is examined. Theoretical background, factors influencing the performance of FRP wrapped columns, and various case studies are presented. Design methodologies and examples supplement the case studies for both beams and columns. Most FRP material systems available on the market today are summarized and evaluated. Construction and durability requirements of the retrofitted systems are presented. Reliability assessment, condition evaluation methods, and factors influencing the strengthening quality are included. The various steps of the construction process, such as selection of a composite strengthening system, concrete surface preparation, and bond between FRP and concrete are summarized. Quality control, environmental durability of FRP composites, and cost effectiveness are presented.

Download or read book Encuesta de Seguimiento del Consumo de Alimentos written by Instituto Nacional de Estadística and published by . This book was released on 1994 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structural Rehabilitation Using Advanced Composites written by Steven J. Foubert and published by . This book was released on 2014-08-09 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Strengthening of Bridge G 270 with Externally Bonded CFRP Sheets written by Randy Lynn Mayo and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This thesis presents the results of a pilot study to apply externally bonded Carbon Fiber Reinforced Polymer (CFRP) sheets to strengthen a simple span reinforced concrete solid slab bridge built in 1922. Strengthening with CFRP sheets was accomplished in three days without traffic interruption, and preparation consisted of only light sandblasting. Bridge G-270 is the only load-posted structure on a heavy truck route that serves a lead mining operation and the objective was to strengthen the bridge to allow removal of the load posting. The University of Missouri-Rolla conducted the pilot study for the Missouri Department of Transportation (MoDOT) under MoDOT Contract No. RI98-012. The laboratory testing included the static flexural test of two full-scale beams, designed as a unit strip from the existing bridge deck, and the fatigue bond test of coupon- type specimens. Two reinforced concrete beams, a control beam and a beam strengthened with externally bonded CFRP were tested under four point bending. Coupon-type specimens consisting of unreinforced concrete beams with a reversed T- shaped cross-section and with a CFRP sheet applied to the bottom were tested. The purpose was to investigate the behavior of bond between CFRP sheets and concrete under fatigue loading. The field load testing of the bridge, before and after strengthening, was performed by the University of Missouri-Columbia to verify the performance of the bridge after the application of externally bonded CFRP. Long-term field measurements also were conducted to monitor the durability and the strain condition of the strengthened system. Pennsylvania State University conducted the monitoring of durability by studying the electrochemical effects of the CFRP material on the degradation of the reinforcing steel. Fiber-optic strain sensors were applied to the FRP reinforcement and the concrete to allow for long-term monitoring of the integrity of the FRP reinforcement. This pilot study was a success. Laboratory and field tests indicate that CFRP sheets, externally applied to a bridge superstructure, strengthened the slab and will allow the removal of the load posting. Monitoring of the bridge will continue"--Abstract, leaf iii

Download or read book Advancement of Optical Methods in Experimental Mechanics Volume 3 written by Helena Jin and published by Springer. This book was released on 2015-11-17 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advancement of Optical Methods in Experimental Mechanics, Volume 3 of the Proceedings of the 2015SEM Annual Conference& Exposition on Experimental and Applied Mechanics, the third volume of nine from the Conference, brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on a wide range of optical methods ranging from traditional photoelasticity and interferometry to more recent DIC and DVC techniques, and includes papers in the following general technical research areas: Advanced optical interferometry Developments in Image correlation (Digital &Volumetric ) Full Field Methods Novel Optical Methods for Stress/Strain Analysis Advances in Optical Methods

Download or read book Developments in fiber reinforced polymer FRP composites for civil engineering written by M. Dawood and published by Elsevier Inc. Chapters. This book was released on 2013-05-15 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter summarizes the recent advances in the use of fiber-reinforced polymer (FRP) materials for repair, rehabilitation, and strengthening of steel structures. Conventional methods of strengthening and repairing steel structures are presented. The advantages and limitations of using FRP materials are summarized. Topics presented include strengthening of flexural members, strengthening with prestressed FRP materials, stress-based and fracture mechanics-based approaches to evaluating bond behavior, repair of cracked steel members, and strengthening of slender members subjected to compression forces. The chapter concludes with a brief discussion of future trends in this field and a summary of other resources for further information.

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2005 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Structural Characteristics and Failure Prediction of Hybrid FRP concrete Bridge Deck and Superstructure Systems written by and published by . This book was released on 2007 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is a major challenge to build bridge systems that have long-term durability and low maintenance requirements. A solution to this challenge may be to use new materials or to implement new structural systems. Fiber reinforced polymer (FRP) composites have continued to play an important role in solving some of persistent problems in infrastructure applications because of its high specific strength, light weight, and durability. Structural engineers always have valued the combination of materials into a hybrid structural system that takes advantage of the properties inherent in each of its constituents. In this study, the concept of the hybrid FRP-concrete structural systems is applied to both bridge superstructure and deck systems. The hybrid FRP-concrete bridge superstructure and deck systems are intended to have durable, structurally sound, and cost effective hybrid system that will take full advantage of the inherent properties of both FRP materials and concrete. The hybrid-FRP deck system can be installed in new construction, or can be attached to existing deck substructure after removing deteriorated concrete deck. In this study, two hybrid FRP-concrete bridge systems were investigated. The first system consists of trapezoidal cell units forming either a bridge superstructure or a bridge deck unit. The second one is formed by arch cells. The two systems rely on using cellular components to form the core of the deck system, and an outer shell to warp around those cells to form the integral unit of the bridge. Both systems were investigated analytically by using finite element (FE) analysis. From the rigorous FE studies, it was concluded that first system is more efficient than the second. Therefore, the first hybrid FRP-concrete system had been used to investigate the feasibility of the FRP-concrete structural systems in the remainder of the study. The proposed system consists of trapezoidal FRP cell units surrounded by an FRP outer shell forming a bridge system. A thin layer of concrete was placed in the compression zone. Concrete was confined by GFRP laminates which provide protection from environmental exposure. Moreover, the concrete layers reduce the local deformation of the top surface of the bridge under concentrated loads. Webs of the box section were designed at an incline to reduce shear force between sections. For the experimental phase of the study, a prototype bridge superstructure was designed as a simply-supported single span one-lane bridge with a span length of 18.3 m. Geometrical parameters of the proposed bridge system were determined by detailed finite element analyses. FEA was used to verify the structural behavior of this hybrid bridge superstructure prior to embarking on manufacturing and testing. Performance of this hybrid bridge superstructure was examined both experimentally and computationally. A test specimen, fabricated as a one-fourth scale model of the prototype bridge, was subjected to a series of loading tests: nondestructive tests (flexure, off-axis flexure, and negative flexure), and destructive tests (flexure and shear). Also, as a trial case for FRP-concrete bridge deck supported on steel girders, a prototype bridge system was designed as a simply supported steel bridge with a hybrid FRP-concrete deck. Details for connecting the hybrid decks with steel girders were investigated both experimentally and computationally. A test specimen, fabricated as a 3/4 scale model of the prototype bridge, was evaluated by series of service flexural loading tests under different loading conditions. Moreover, the composite action between the hybrid deck and steel girders was analyzed and tested. The effective flange width in the hybrid FRP-concrete deck acting compositely with the steel girders was evaluated at service conditions. Three different constitutive models for GFRP composites were integrated in the finite element analysis to examine the inelastic behavior and to predict failure of both the hybrid bridge deck and superstructure. Results from the both experimental and computational analysis for both the hybrid bridge superstructure and deck systems confirmed that the hybrid FRP-concrete bridge systems have an excellent performance from structural engineering point of view. The experimental results showed robust performance where cracking in the exterior GFRP laminates, interface failure, and slippage between GFRP and concrete under AASHTO design loads for the hybrid bridge superstructure were not exhibited. Also, both test specimens satisfied the AASHTO live load deflection limit. In addition, the shear connections at girder-deck interface of the deck specimen on steel girders demonstrated an excellent performance under service load. Furthermore, it was observed that the hybrid deck and the steel girders are interacting as a partially composite system under service-load conditions. The effective flange width for hybrid decks are less than AASHTO prescribed effective width for reinforced concrete decks. It was shown that a detailed finite element analysis could predict behavior of the test specimens under different loading conditions up to the failure point.

Download or read book Performance Evaluation of Short span Bridges Built with Fiber Reinforced Polymer FRP Composite Systems written by Ursula Mercedes Deza and published by . This book was released on 2004 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This investigation studied the structural performance of FRP composite materials in bridge decks through in-place load tests and analytical studies. Two multi-panel bridge decks were studied: Saint Francis Street Bridge consisting of a deck built with four glass FRP (GFRP) honeycomb panels, whereas Waters Street Bridge consists of nine FRP-RC panels. The performance of the two bridges was monitored by load tests for over three to four years. The main objectives of this investigation were: to examine the deflection data in service that can be correlated to allowable deflections; to estimate if there is any stiffness degradation that can indicate distress in the deck; to compute the load fraction distribution between panels based on experimental data and attempt the load rating using the load test results"--Introduction, leaves 2-3.