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Structural And Durability Evaluation Of Xxsys Technologies Frp Composite Column Wrap System For Seismic Retrofit Of Columns
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Book Synopsis Structural and Durability Evaluation of Xxsys Technologies' Frp Composite Column Wrap System for Seismic Retrofit of Columns by :
Download or read book Structural and Durability Evaluation of Xxsys Technologies' Frp Composite Column Wrap System for Seismic Retrofit of Columns written by and published by . This book was released on 2004-03-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Highway Innovative Technology Evaluation Center (U.S.) Publisher :Amer Society of Civil Engineers ISBN 13 :9780784406663 Total Pages : pages Book Rating :4.4/5 (66 download)
Book Synopsis Guidelines for Structural and Durability Evaluation of Frp Composite Column Wrap Systems for Seismic Retrofit of Columns by : Highway Innovative Technology Evaluation Center (U.S.)
Download or read book Guidelines for Structural and Durability Evaluation of Frp Composite Column Wrap Systems for Seismic Retrofit of Columns written by Highway Innovative Technology Evaluation Center (U.S.) and published by Amer Society of Civil Engineers. This book was released on 2003-01-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guidelines for Laboratory and Field Evaluation of Durability of FRP Composite Column Wrap Systems for Seismic Retrofit of Columns by : Vistasp M. Karbhari
Download or read book Guidelines for Laboratory and Field Evaluation of Durability of FRP Composite Column Wrap Systems for Seismic Retrofit of Columns written by Vistasp M. Karbhari and published by . This book was released on 1998 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Society of Civil Engineers Publisher :Amer Society of Civil Engineers ISBN 13 :9780784407240 Total Pages : pages Book Rating :4.4/5 (72 download)
Book Synopsis Guidelines for Structural and Durability Evaluation of Frp Composite Column Wrap Systems for Seismic Retrofit of Columns by : American Society of Civil Engineers
Download or read book Guidelines for Structural and Durability Evaluation of Frp Composite Column Wrap Systems for Seismic Retrofit of Columns written by American Society of Civil Engineers and published by Amer Society of Civil Engineers. This book was released on 2004-01-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Highway Innovative Technology Evaluation Publisher :Amer Society of Civil Engineers ISBN 13 :9780784404096 Total Pages : pages Book Rating :4.4/5 (4 download)
Book Synopsis Guidelines for Evaluating Composite Column Wrap Systems for Seismic Retrofit by : Highway Innovative Technology Evaluation
Download or read book Guidelines for Evaluating Composite Column Wrap Systems for Seismic Retrofit written by Highway Innovative Technology Evaluation and published by Amer Society of Civil Engineers. This book was released on 2002-01-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Retrofit of RC Columns with FRP Composites and Anchorage System by : Apostolos Psaros Andriopoulos
Download or read book Seismic Retrofit of RC Columns with FRP Composites and Anchorage System written by Apostolos Psaros Andriopoulos and published by . This book was released on 2015 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on the use of composite materials in structural applications started more than 30 years ago but still remains active. The challenges that accompany those applications are diverse and seem to increase as the variety of applications grows. There are several fiber-reinforced polymer (FRP) systems that have been introduced through the years for strengthening reinforced concrete (RC) structures. Those systems focus on strengthening of slabs, beams and columns. The present study pertains to seismic retrofit of rectangular RC columns. The typical FRP materials used in structural applications are introduced, as well as, how FRP materials become an integral part of the force-resisting system. In addition, analysis work pertaining to a series of strengthened RC columns was conducted and the results were compared to the experimental data. Moreover, deficiencies of typical material models were highlighted. Design guidelines are discussed and recommendations about current design practices are provided. Finally, research gaps and future research recommendations are identified.
Author :Konstantinos G. Megalooikonomou Publisher :Cambridge Scholars Publishing ISBN 13 :1527530361 Total Pages :387 pages Book Rating :4.5/5 (275 download)
Book Synopsis Seismic Assessment and Retrofit of Reinforced Concrete Columns by : Konstantinos G. Megalooikonomou
Download or read book Seismic Assessment and Retrofit of Reinforced Concrete Columns written by Konstantinos G. Megalooikonomou and published by Cambridge Scholars Publishing. This book was released on 2019-02-27 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reinforced concrete columns play a very important role in structural performance. As such, it is essential to apply a suitable analytical tool to estimate their structural behaviour considering all failure mechanisms such as axial, shear, and flexural failures. This book highlights the development of a fiber beam-column element accounting for shear effects and the effect of tension stiffening through reinforcement-to-concrete bond, along with the employment of suitable constitutive material laws.
Book Synopsis American Book Publishing Record by :
Download or read book American Book Publishing Record written by and published by . This book was released on 2003 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Using Composites in Seismic Retrofit Applications by : Vistasp M. Karbhari
Download or read book Using Composites in Seismic Retrofit Applications written by Vistasp M. Karbhari and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Fiber Column Wrap Seismic Retrofit System by :
Download or read book Evaluation of Fiber Column Wrap Seismic Retrofit System written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Composite Confinement Systems for RC Column Repair and Construction Under Seismic Loads by : Mostafa Fakharifar
Download or read book Composite Confinement Systems for RC Column Repair and Construction Under Seismic Loads written by Mostafa Fakharifar and published by . This book was released on 2016 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This study aims at developing, characterizing and validating an integrated composite confinement system of conventional jackets for: (1) repair and retrofit of existing bridge columns; and (2) construction of new bridge columns, subjected to earthquake excitations. A new composite steel confinement jacket was proposed by combining a thin steel sheet and prestressing strands as a hybrid jacket, incorporating active and passive confining pressure on damaged RC columns. Both experimental and analytical studies were conducted to understand the performance and effectiveness of the proposed repair method. The experimental study involved two 1/2-scale lap-spliced deficient RC bridge columns originally tested to failure under reversed cyclic loading. The proposed jacket was designed and implemented to repair the damaged columns to achieve the required performance level after repair intervention for service and ultimate limit states. Experimental results indicated that both repaired columns exceeded the strength and ductility of their as-built columns. The stiffness of the second column designed for ultimate limit state was completely restored. Analytical studies and collapse analyses on the seismic performance of post-mainshock repaired bridges subjected to mainshock-aftershock sequences demonstrated the efficacy of the proposed technique under severe mainshock-severe aftershock attacks. Another new composite confinement system of a fiber reinforced polymer (FRP) sheet wrapped around a polyvinyl chloride (PVC) tube with energy dissipation medium in between was developed for new bridge columns construction. This composite system is essentially a FRP-confined concrete-filled PVC tube, featuring exceptional durability properties of PVC materials in addition to high strength of the FRP fabrics. Experimental tests under uniaxial compression and flexural loading were undertaken to establish the representative stress-strain behavior of confined concrete filled PVC tubes (CCFPT). Experimental studies clearly demonstrated that the CCFPT system outperforms conventional FRP jacket. The intermediate energy dissipation medium is critical to make the post-peak behavior more ductile. Analytical studies were conducted and equations were derived for the prediction of the ultimate strength and strain of a CCFPT system"--Abstract, page iv.
Book Synopsis 2001: a Materials and Processes Odyssey by : Linas Repecka
Download or read book 2001: a Materials and Processes Odyssey written by Linas Repecka and published by Taylor & Francis. This book was released on 2001 with total page 2828 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Integrity of RC Columns Wrapped with FRP Sheet Subjected to Various Environmental Conditions Including Corrosion by :
Download or read book Structural Integrity of RC Columns Wrapped with FRP Sheet Subjected to Various Environmental Conditions Including Corrosion written by and published by . This book was released on 2004 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the short-term performance of reinforced concrete (RC) columns wrapped with fiber reinforced polymer (FRP) composite materials has been widely studied, research studies on the long-term performance are limited. The objective of this study was to evaluate the effects of various environmental conditions on the long-term behavior of RC columns wrapped with FRP sheets. The experimental program comprised two parts - ambient environmental effect tests and corrosion tests. The environmental conditions considered in the ambient environmental tests included (1) freeze-thaw cycles, (2) high-temperature cycles, (3) high-humidity cycles, (4) ultraviolet (UV) radiation, and (5) saline solution; while the corrosion tests dealt with the corrosion of steel reinforcement embedded in RC columns wrapped with FRP sheets. RC columns were wrapped with carbon fiber reinforced polymer (CFRP) sheets and glass fiber reinforced polymer (GFRP) sheets and conditioned under the environmental conditions listed. After the environmental conditioning, uni-axial compression tests were conducted in order to evaluate the effects on the mechanical properties, such as column capacity, stiffness, and ductility.
Book Synopsis Comparison and Retrofitting of Rcc Columns with Frp Overlays by : Aditya Gaikwad
Download or read book Comparison and Retrofitting of Rcc Columns with Frp Overlays written by Aditya Gaikwad and published by LAP Lambert Academic Publishing. This book was released on 2010-10 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes a detailed comparision of the various engineering properties of an FRP column and a reinforced concrete column. Also, a detailed understanding of the various processes involved in the manufacturing and testing of a FRP composite for retrofitting has been presented. There is a considerable number of existing reinforced concrete structures that do not meet current design standards because of inadequate design and/or construction or need structural upgrading to meet new seismic design requirements. Inadequate performance of this type of structures is a major concern from public safety standpoint. This paper presents an experimental research program aimed at developing a retrofitting technique that utilizes locally available high strength, lightweight, corrosion resistance advanced composites for retrofitting existing reinforced concrete columns. The proposed technique consists of applying Glass Fiber Reinforced Plastic (GFRP) to all surfaces of the concrete column to increase its stiffness and flexural strength.
Book Synopsis Analytical Models for Reinforced Concrete Columns Retrofitted with Fiber-reinforced Polymer Composites by : Jason Donald Ross
Download or read book Analytical Models for Reinforced Concrete Columns Retrofitted with Fiber-reinforced Polymer Composites written by Jason Donald Ross and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Traditional rebar reinforcement methods in concrete columns have been accepted for many years as the common practice among designers and contractors. There has been a tremendous amount of research completed and designers are capable of predicting the future performance of the columns. More recently, retrofit methods have been used on aging concrete columns. This includes adding an additional layer of concrete or composite material around the existing column to slow the deterioration and to increase the concrete confinement. Current models exist in the use of a combination of a rebar cage and concrete as the retrofit method. Fiber-reinforced polymer (FRP) wraps are fast becoming a new form of technology to replace traditional rebar retrofit technology. The fiber-reinforced polymer wraps are a composite material that can be attached to the existing concrete column using an epoxy resin. The wrap increases the concrete confinement of the column and provides support for the concrete dilation in the column. However, FRP wraps are not heavily used in structural applications because there is not an accepted model that has been proven to accurately predict future strength characteristics of the confined concrete column. The focus of this research project is to use the results of an already completed test of concrete columns confined by FRP wraps, and compare the resulting stress-strain curves to the commonly proposed modeling technology available. FRP modeling is still relatively new and there is not a widely accepted model. The purpose of this research project is to determine how accurately the proposed FRP models predict the strength of the tested columns. There are many different models that have been proposed, but the key to the future of FRP retrofitting is to create a widely accepted, reliable model that engineers can use in design. It is important to normalize the design process of FRP retrofitted columns in order to better use the technology in the future.
Book Synopsis Experimental Validation of an Integrated FRP and Visco-elastic Hardening, Damping, and Wave-modulating System for Blast Resistance Enhancement of RC Columns by : Brian Henry Wood
Download or read book Experimental Validation of an Integrated FRP and Visco-elastic Hardening, Damping, and Wave-modulating System for Blast Resistance Enhancement of RC Columns written by Brian Henry Wood and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In today's society, terrorist attacks and accidental explosions pose a major threat to critical infrastructure. Vulnerable to blast loading, structures must be rehabilitated to ensure structural stability and protect human life. The goal of this study is to develop and validate a sandwich composite technology for column retrofitting. The new technology consists of an inner fiber reinforced polymer (FRP) sheet, an outer FRP sheet, and a visco-elastic (VE) layer sandwiched between the two FRP sheets. The inner FRP sheet is wrapped around an existing column for confinement, while the outer FRP sheet is for anchoring of the VE layer into the column supports. The compact, inexpensive, and easy to construct system has been shown effective under seismic loads. In this study, the blast performance of the engineering system is investigated with two main objectives: to field validate the effectiveness of the system for hardening, damping, and wave-modulating (HDM) of a reinforced concrete (RC) column under blast loads, and to validate the performance of coaxial cable crack sensors for dynamic measurements under blast loads"--Abstract, leaf iii
Book Synopsis Use of Carbon Fiber Reinforced Polymer Sheets as Transverse Reinforcement in Bridge Columns by : Gamal Elnabelsya
Download or read book Use of Carbon Fiber Reinforced Polymer Sheets as Transverse Reinforcement in Bridge Columns written by Gamal Elnabelsya and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Performance of bridges during previous earthquakes has demonstrated that many structural failures could be attributed to seismic deficiencies in bridge columns. Lack of transverse reinforcement and inadequate splicing of longitudinal reinforcement in potential plastic hinge regions of columns constitute primary reasons for their poor performance. A number of column retrofit techniques have been developed and tested in the past. These techniques include steel jacketing, reinforced concrete jacketing and use of transverse prestressing (RetroBelt) for concrete confinement, shear strengthening and splice clamping. A new retrofit technique, involving fibre reinforced polymer (FRP) jacketing has emerged as a convenient and structurally sound alternative with improved durability. The new technique, although received acceptance in the construction industry, needs to be fully developed as a viable seismic retrofit methodology, supported by reliable design and construction procedures. The successful application of externally applied FRP jackets to existing columns, coupled with deteriorating bridge infrastructure, raised the possibility of using FRP reinforcement for new construction. Stay-in-place formwork, in the form of FRP tubes are being researched for its feasibility. The FRP stay-in-place tubes offer ease in construction, convenient formwork, and when left in place, the protection of concrete against environmental effects, including the protection of steel reinforcement against corrosion, while also serving as column transverse reinforcement. Combined experimental and analytical research was conducted in the current project to i) improve the performance of FRP column jacketing for existing bridge columns, and ii) to develop FRP stay-in-place formwork for new bridge columns. The experimental phase consisted of design, construction and testing of 7 full-scale reinforced concrete bridge columns under simulated seismic loading. The columns represented both existing seismically deficient bridge columns, and new columns in stay-in-place formwork. The existing columns were deficient in either shear, or flexure, where the flexural deficiencies stemmed from lack of concrete confinement and/or use of inadequately spliced longitudinal reinforcement. The test parameters included cross-sectional shape (circular or square), reinforcement splicing, column shear span for flexure and shear-dominant behaviour, FRP jacket thickness, as well as use of FRP tubes as stay-in-place formwork, with or without internally embedded FRP crossties. The columns were subjected to a constant axial compression and incrementally increasing inelastic deformation reversals. The results, presented and discussed in this thesis, indicate that the FRP retrofit methodology provides significant confinement to circular and square columns, improving column ductility substantially. The FRP jack also improved diagonal tension capacity of columns, changing brittle shear-dominant column behavior to ductile flexure dominant response. The jackets, when the transverse strains are controlled, are able to improve performance of inadequately spliced circular columns, while remain somewhat ineffective in improving the performance of spliced square columns. FRP stay-in-place formwork provides excellent ductility to circular and square columns in new concrete columns, offering tremendous potential for use in practice. The analytical phase of the project demonstrates that the current analytical techniques for column analysis can be used for columns with external FRP reinforcement, provided that appropriate material models are used for confined concrete, FRP composites and reinforcement steel. Plastic analysis for flexure, starting with sectional moment-curvature analysis and continuing into member analysis incorporating the formation of plastic hinging, provide excellent predictions of inelastic force-deformation envelopes of recorded hysteretic behaviour. A displacement based design procedure adapted to FRP jacketed columns, as well as columns in FRP stay-in-place formwork provide a reliable design procedure for both retrofitting existing columns and designing new FRP reinforced concrete columns.
