Download or read book An Experimental Investigation of Bond slip in Reinforced Concrete written by John Augustus Tanner and published by . This book was released on 1971 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Experimental Investigation of Bond in Reinforced Concrete written by Joshua S. Martin and published by . This book was released on 2006 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Investigation of Bond slip Relationship Between Fiber Reinforced Polymers FRP Bars and Concrete written by and published by . This book was released on 2003 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interfacial Transition Zone in Concrete written by J.C. Maso and published by CRC Press. This book was released on 2004-03-01 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: An important new state-of-the-art report prepared by RILEM Technical Committee 108 ICC. It has been written by a team of leading international experts from the UK, USA, Canada, Israel, Germany, Denmark, South Africa, Italy and France. Research studies over recent years in the field of cement science have focused on the behaviour of the interfaces between the components of cement-based materials. The techniques used in other areas of materials science are being applied to the complex materials found in cements and concretes, and this book provides a significant survey of the present state of the art.

Download or read book Method for the Experimental Determination of Bond slip in Reinforced Concrete written by Terrell James Wilson and published by . This book was released on 1981 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental and Analytical Investigations on Bond of Reinforcement and Nonlinear Response of Reinforced Concrete Columns written by Ghassan Fawaz and published by . This book was released on 2020 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bond of reinforcement has a major influence on the behavior of reinforced concrete (RC) structures. Even though bond has been extensively studied over the past decades, there are still a number of knowledge gaps requiring investigation. This dissertation presents three studies related to the basic bond behavior of reinforcement and the influence of bond-slip on the seismic response of RC columns. The first investigation characterizes the bond behavior of iron-based shape-memory alloy (Fe-SMA) bars. Fe-SMA reinforcement provides new opportunities for design and strengthening of concrete structures thanks to their shape memory effect. However, there is currently little data on its bond performance. Experiments were conducted to study the bond-slip behavior of ribbed Fe-SMA bars embedded in concrete specimens with different levels of passive confinement. Fe-SMA bars presented a similar bond performance as conventional reinforcement, but their bond strength was reduced with heat activation in low-confined specimens. An analytical model is also proposed to calculate the transfer length of Fe-SMA bars in prestressing applications. The second investigation proposes nonlinear finite element models to accurately simulate the cyclic response of RC columns, including the effect of bond-slip. Concrete is modeled using a triaxial constitutive model recently proposed in the literature. A commonly used uniaxial steel model is modified to account for low-cycle fatigue rupture using a phenomenological criterion. The bond-slip behavior of bars is modeled using a zero-thickness interface element and a bond stress-slip law that predicts bond deterioration caused by generalized slip demands, tensile yielding of steel, and concrete damage. The proposed models accurately predict the cyclic response and failure of previously tested column components. The third investigation focuses on the effects of strain penetration and bond modification on the lateral response of RC columns. Two large-scale column specimens were tested under cyclic loading. One specimen had conventional reinforcement details, while the other had headed bars that were partially debonded along the footing to alleviate strain concentrations. Both specimens formed plastic hinges and failed due to rupture of longitudinal bars. The specimen with partial debonding presented less damage and a larger deformation capacity. Experimental data indicated that the debonding strategy reduced peak tensile strains, and increased bar slip and fixed-end rotations. However, it also reduced the lateral load resistance of the column. Companion finite element analyses have indicated that the reduction in peak lateral strength is caused by lower steel stress demands when concrete cover fails

Download or read book Experimental Investigation of Bond in Concrete Due to Lateral Stress written by Olubukola Adeola Adeboyejo and published by . This book was released on 1987 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Externally Bonded FRP Reinforcement for RC Structures written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2001-01-01 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: In December 1996, the then CEB established a Task Group with the main objective to elaborate design guidelines for the use of FRP reinforcement in accordance with the design format of the CEB-FIP Model Code and Eurocode2. With the merger of CEB and FIP into fib in 1998, this Task Group became fib TG 9.3 FRP Reinforcement for concrete structures in Commission 9 Reinforcing and Prestressing Materials and Systems. The Task Group consists of about 60 members, representing most European universities, research institutes and industrial companies working in the field of advanced composite reinforcement for concrete structures, as well as corresponding members from Canada, Japan and USA. Meetings are held twice a year and on the research level its work is supported by the EU TMR (European Union Training and Mobility of Researchers) Network "ConFibreCrete”. The work of fib TG 9.3 is performed by five working parties (WP): Material Testing and Characterization (MT&C) Reinforced Concrete (RC) Prestressed Concrete (PC) Externally Bonded Reinforcement (EBR) Marketing and Applications (M&A) This technical report constitutes the work conducted as of to date by the EBR party. This bulletin gives detailed design guidelines on the use of FRP EBR, the practical execution and the quality control, based on the current expertise and state-of-the-art knowledge of the task group members. It is regarded as a progress report since it is not the aim of this report to cover all aspects of RC strengthening with composites. Instead, it focuses on those aspects that form the majority of the design problems. several of the topics presented are subject of ongoing research and development, and the details of some modelling approaches may be subject to future revisions. as knowledge in this field is advancing rapidly, the work of the EBR WP will continue. Inspite of this limit in scope, considerable effort has been made to present a bulletin that is today’s state-of-art in the area of strengthening of concrete structures by means of externally bonded FRP reinforcement.

Download or read book An experimental investigation of interface bond strength of concrete using large powder driven nails written by Donguk Choi and published by . This book was released on 1996 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental and Analytical Investigation of Bond slip Relationship Between Fiber Reinforced Polymers FRP Bars and Concrete written by Aniket Dilip Borwankar and published by . This book was released on 2004 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bond Stress slip Models and Behavior of Aluminum Alloys concrete Interface written by Ahmed Mirghani and published by . This book was released on 2017 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In the last few decades, different techniques have been used for strengthening reinforced concrete (RC) structures to increase their strength and stiffness. One of these techniques involves the use of steel and fiber reinforced polymers (FRP) as externally bonded reinforcing (EBR) materials. The use of FRP and steel as EBR materials has many advantages and disadvantages. Recently developed aluminum alloys (AA) have many desirable characteristics that may overcome some of these disadvantages making them an attractive candidate as EBR materials. This research aims to examine and evaluate the use of AA as a new EBR material. Achieving a strong bond between AA and concrete is crucial to the success of AA as an EBR material. Several parameters affect the bond strength and behavior. Such parameters include concrete compressive strength, effective bond length, stiffness and surface of the EBR material, concrete surface, thickness and width of the EBR material and adhesive type. In this study the bond strength, effective bond length and bond-slip models for AA-concrete interface were determined. A comprehensive experimental investigation including 96 specimens was conducted to evaluate the bond strength and behavior using adhesive as bonding material. Concrete strength, bond length and plate type were used as variables while other parameters were kept constant. It was observed that the bond stress, loading capacity, and failure modes vary with AA surface roughness and bonded length. The load capacity and maximum bond stress increased by 254.7% and 253.7%, respectively for randomly grinded AA surface compared with those of normal AA surface indicating that AA plates with scratched surface could be used in practical applications. Moreover, AA scratched plates exhibits higher ultimate loads compared with CFRP plates. The load capacity for AA scratched plates increases by 5.6% for the short bonded length up to 22.5% for the long bonded length when compared to the CFRP plates. In addition, the bond-slip models of the AA plates were developed, with reasonable level of accuracy. Moreover, finite element (FE) models were developed for a number of tested specimens. The results of the FE modeling showed a great agreement with the corresponding experimental results."--Abstract.

Download or read book Analytical Investigation of Bond slip Relationship Parameters Between Fiber Reinforced Polymers FRP Bars and Concrete written by Snehal Kadam and published by . This book was released on 2006 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this thesis is to quantify the bond & slip behavior of deformed fiber reinforced polymer rods made of carbon (CFRP) & glass (GFRP) with concrete using the data from a set of experiments conducted previously. These experiments involved a modified form of the standard pullout tests with the goal to minimize the confining action due to the surrounding concrete being in compression. This is shown by performing a finite element simulation of the experimental setup. Then a numerical study is performed to compare the experimental results with some of the bond parameter given in ACI 440.3R-04. This is followed by analytical modeling of bond slip law of GFRP which involves rigorous computational analysis and finding the unknown parameters of the adopted m-BEP model so as to predict the applied pullout force and its consequent loaded end slip to compare with the experimental data.

Download or read book Experimental Study on Bond Behaviour of CFRP Sheets Externally Bonded to Reinforced Concrete written by Emmanuella Atunbi and published by . This book was released on 2018 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiber reinforced polymers (FRP) have become widely used in retrofitting existing reinforced concrete (RC) structures because of their high strength and stiffness-to-weight ratio. An important aspect in the design of this composite element is determining the bond behaviour of the FRP sheet-to-concrete interface. Previous studies have involved the use of conventional instrumentation (typically strain gauges) that provide limited data to work with. This study presents an experimental investigation to determine the effect of bond length and stress on the bond behaviour of FRP-to-concrete interface under static loads using a digital image correlation (DIC) technique. Twelve double lap shear specimens bonded with carbon fiber reinforced polymer (CFRP) sheets were tested with varying bond lengths. Development length, longitudinal strains and bond stress and slip relationships were obtained and compared with values computed from existing models. Comprehensive results were obtained from the DIC technique which allowed for proper monitoring of the progression of failure and the effect of shear lag on the distribution of stresses in the FRP sheet.

Download or read book Manual of Numerical Methods in Concrete written by M Y H Bangash and published by Thomas Telford. This book was released on 2001-07-27 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manual of numerical methods in concrete aims to present a unified approach for the available mathematical models of concrete, linking them to finite element analysis and to computer programs in which special provisions are made for concrete plasticity, cracking and crushing with and without concrete aggregate interlocking. Creep, temperature, and shrinkage formulations are included and geared to various concrete constitutive models.

Download or read book NUREG CR written by U.S. Nuclear Regulatory Commission and published by . This book was released on 1980 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bond in Concrete written by Peter Bartos and published by . This book was released on 1982 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Experimental Investigation of the Bond Between Plain Rods and Concrete Made with Lumnite Cement written by Glennon Gilboy and published by . This book was released on 1925 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: