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A New Punching Shear Strengthening Technique For Reinforced Concrete Slabs At Interior Slab Column Connections
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Book Synopsis A New Punching Shear Strengthening Technique for Reinforced Concrete Slabs at Interior Slab-column Connections by : Bamidele Adetifa
Download or read book A New Punching Shear Strengthening Technique for Reinforced Concrete Slabs at Interior Slab-column Connections written by Bamidele Adetifa and published by . This book was released on 2003 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Punching Shear in Reinforced Concrete Slabs by : Maria Anna Polak
Download or read book Punching Shear in Reinforced Concrete Slabs written by Maria Anna Polak and published by . This book was released on 2005 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Punching Shear Retrofit of Concrete Slab-column Connections with GFRP Shear Bolts by : Nicholas David Lawler
Download or read book Punching Shear Retrofit of Concrete Slab-column Connections with GFRP Shear Bolts written by Nicholas David Lawler and published by . This book was released on 2008 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the life span of a structure it may become necessary to retrofit, or strengthen certain components or elements. This may be due to construction errors, changes in use and occupancy, or changes due to material deterioration or damage. Slab-column connections in flat slab structures might need to be strengthened for punching shear. Using steel shear bolts to strengthen connections for punching shear is a new technique used for retrofit that was developed at the University of Waterloo. If the retrofitted part of the structure is exposed to the atmosphere, or to chemicals such as deicing salts, the steel can corrode, thus furthering to damage the structure. Non-corrosive materials that can replace the steel shear bolts can be a good practical alternative to steel. Reported in this thesis are the results of research on the development and use of non-corrosive shear bolts for reinforced concrete interior slab-column connections. Externally applied shear reinforcing bolts provide the punching shear reinforcement strength, while allowing the flexibility and ease of installation of an external application after construction. By providing a bearing area against both sides of the slab surface, the formation of punching shear cracks can be restrained, and the connection can become strengthened against punching shear failure. Three different types of non-corrosive shear bolts were developed and tested. The first was an off-the-shelf glass fiber reinforced polymer (GFRP) bolt / nut product. The two others used two different GFRP core rods with aluminum fittings crimped to their ends. A total of six specimens were tested, four were tested under an increasing static load, while two were tested with an unbalanced pseudo-dynamic lateral load. All six specimens were designed to fail in punching shear before reaching their flexural capacity. The results are compared against previous test results of specimens both unreinforced and reinforced with steel shear bolts to determine their effectiveness. From the test results it was found that the GFRP shear bolts did strengthen the connections for punching shear. The GFRP nut and bolt did not strengthen the connection, and, in fact, decreased its overall strength when compared to the unreinforced specimen. The presence of the GFRP shear bolts also increased the connection ductility and the deflection capability. In the pseudo-dynamic tests the GFRP shear bolts significantly increased the amount of energy dissipated by the connection under reverse cyclic loading. The results of the testing appeared to be depended on the proper application of the crimping technique to place the bolts in the slab.
Book Synopsis Punching Shear Strength of Slab-column Connections in Reinforced Concrete by : Wahid R. Hakki
Download or read book Punching Shear Strength of Slab-column Connections in Reinforced Concrete written by Wahid R. Hakki and published by . This book was released on 1982 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Punching Shear in Heated Interior Reinforced Concrete Slab-column Connections by : Rwayda Al Hamd
Download or read book Punching Shear in Heated Interior Reinforced Concrete Slab-column Connections written by Rwayda Al Hamd and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Publisher :World Scientific ISBN 13 : Total Pages :771 pages Book Rating :4./5 ( download)
Download or read book written by and published by World Scientific. This book was released on with total page 771 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Design of Two-way Slabs written by and published by . This book was released on 1999 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Post-punching Shear Response of Two-way Slabs by : Farshad Habibi
Download or read book Post-punching Shear Response of Two-way Slabs written by Farshad Habibi and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This thesis investigates the post-punching behaviour of reinforced concrete slab-column connections. Seven interior slab-column connections were tested to study the effects of slab thickness, the length of structural integrity reinforcing bars, the distribution of structural integrity reinforcement in slabs with rectangular columns and the placement of structural integrity reinforcement in slabs with drop panels. Results from this test series and from tests by other researchers were compared with predictions using the CSA A23.3-04 design equations for both punching shear and post-punching resistance. The test results demonstrated that the provision of structural integrity reinforcement in accordance with the requirements of CSA A23.3-04 resulted in significant post-punching resistance and the design equations provide a reasonable estimate of this resistance. In addition, an analytical model for predicting the post-punching shear response of slab-column connections is presented which accounts for the individual contributions of each layer of top reinforcement and each layer of the structural integrity reinforcement. The contribution of each layer of top and integrity reinforcement is governed by three different failure modes, including rupture of the bars, concrete breakout of the bars and pullout of the bars. The predictions are compared with experimental results and the results obtained by the CSA A23.3 Standard design method. There was a good agreement between the predicted results and the experimental results." --
Book Synopsis Punching Shear Retrofit Method Using Shear Bolts for Reinforced Concrete Slabs Under Seismic Loading by : Wensheng Bu
Download or read book Punching Shear Retrofit Method Using Shear Bolts for Reinforced Concrete Slabs Under Seismic Loading written by Wensheng Bu and published by . This book was released on 2008 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reinforced concrete slab-column structures are widely used because of their practicality. However, this type of structures can be subject to punching-shear failure in the slab-column connections. Without shear reinforcement, the slab-column connection can undergo brittle punching failure, especially when the structure is subject to lateral loading in seismic zones. The shear bolts are a new type of transverse reinforcement developed for retrofit of existing structures against punching. This research focuses on how the shear bolts can improve the punching-shear capacity and ductility of the existing slab-column connections under vertical service and lateral seismic loads.
Book Synopsis Punching shear of structural concrete slabs by : FIB - Féd. Int. du Béton
Download or read book Punching shear of structural concrete slabs written by FIB - Féd. Int. du Béton and published by FIB - Féd. Int. du Béton. This book was released on 2017 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: fib Bulletin 81 reports the latest information available to researchers and practitioners on the analysis, design and experimental evidence of punching shear of structural concrete slabs. It follows previous efforts by the International Federation for Structural Concrete (fib) and its predecessor the Euro-International Committee for Concrete (CEB), through CEB Bulletin 168, Punching Shear in Reinforced Concrete (1985) and fibBulletin 12, Punching of structural concrete slabs (2001), and an international symposium sponsored by the punching shear subcommittee of ACI Committee 445 (Shear and Torsion) and held in Kansas City, Mo., USA, in 2005. This bulletin contains 18 papers that were presented in three sessions as part of an international symposium held in Philadelphia, Pa., USA, on October 25, 2016. The symposium was co-organized by the punching shear sub-committee of ACI 445 and by fib Working Party 2.2.3 (Punching and Shear in Slabs) with the objectives of not only disseminating information on this important design subject but also promoting harmonization among the various design theories and treatment of key aspects of punching shear design. The papers are organized in the same order they were presented in the symposium. The symposium honored Professor Emeritus Neil M. Hawkins (University of Illinois at Urbana-Champaign, USA), whose contributions through the years in the field of punching shear of structural concrete slabs have been paramount. The papers cover key aspects related to punching shear of structural concrete slabs under different loading conditions, the study of size effect on punching capacity of slabs, the effect of slab reinforcement ratio on the response and failure mode of slabs, without and with shear reinforcement, and its implications for the design and formulation in codes of practice, an examination of different analytical tools to predict the punching shear response of slabs, the study of the post-punching response of concrete slabs, the evaluation of design provisions in modern codes based on recent experimental evidence and new punching shear theories, and an overview of the combined efforts undertaken jointly by ACI 445 and fib WP 2.2.3 to generate test result databanks for the evaluation and calibration of punching shear design recommendations in North American and international codes of practice.
Book Synopsis Punching Shear Strength of Reinforced Concrete Slab by : Xiao-Yun Shao
Download or read book Punching Shear Strength of Reinforced Concrete Slab written by Xiao-Yun Shao and published by . This book was released on 1993 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Punching Shear Strengthening of Flat Slabs Using Ferrocement by : El Sayed Mahmoud
Download or read book Punching Shear Strengthening of Flat Slabs Using Ferrocement written by El Sayed Mahmoud and published by LAP Lambert Academic Publishing. This book was released on 2015-05-08 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Punching shear failure is a big issue in flat slab-column connections where the failure is a sudden and brittle. This research presents a proposed method for strengthening flat slab-column connections using ferrocement laminates. Both experimental and numerical investigations were carried out to study the effectiveness of this method in strengthening. An experimental program, ten square slabs with a concentric column was tested. Two specimens were kept as control specimens, and eight of them were strengthened with ferrocement laminates. The studied parameters were thickness of ferrocement laminates, type of wire mesh, volume fraction of reinforcement and strengthening type. The finite element software program (ANSYS 9) was used in the numerical analysis to model the strengthened slab-column connections.
Book Synopsis Reinforced Concrete Slabs by : Robert Park
Download or read book Reinforced Concrete Slabs written by Robert Park and published by John Wiley & Sons. This book was released on 1999-12-28 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unter "bewehrtem Beton" versteht man eine Kombination von Beton mit anderen, verstärkenden Materialien (meist Stahl). Aus Stahlbetonplatten werden nicht nur Häuser gebaut, sondern auch Straßen und Mauern. Bauingenieure müssen die Merkmale und Einsatzfelder dieser Werkstoffe kennen und Belastungsgrenzen abschätzen. Dieses Buch, das einzige seiner Art, dient Praktikern und Studenten der Bautechnik als kompetenter Begleiter. (01/00)
Book Synopsis Punching Strength of Continuous Flat Slabs by : Jürgen Einpaul
Download or read book Punching Strength of Continuous Flat Slabs written by Jürgen Einpaul and published by . This book was released on 2016 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mots-clés de l'auteur: continuous slabs ; compressive membrane action ; Critical Shear Crack Theory ; interior slab-column connections ; Model Code 2010 ; moment redistribution ; punching shear model ; punching tests ; reinforced concrete flat slabs.
Book Synopsis Punching Shear Behaviour of GFRP-RC Slab-column Interior Connections with High Strength Concrete and Shear Reinforcement by : Ahmed Hussein
Download or read book Punching Shear Behaviour of GFRP-RC Slab-column Interior Connections with High Strength Concrete and Shear Reinforcement written by Ahmed Hussein and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work deals with punching shear behaviour of flat plates reinforced with glass fibre-reinforced polymers (GFRP) reinforcing bars. Six full-scale reinforced concrete (RC) slab-column interior connections were constructed and tested to failure. Two variables were investigated; the flexural reinforcement ratio when high strength concrete (HSC) is used and the type of GFRP shear reinforcement (headed studs and corrugated bars) when normal strength concrete (NSC) is used. All specimens were tested under concentric shear force and unbalanced bending moment with a constant moment-to-shear ratio. Increasing the reinforcement ratio increased punching capacity and post-cracking stiffness for HSC connections. Both types of shear reinforcement increased the punching capacity and deflection of NSC connections. Test results were compared with the predictions of the available fibre-reinforced polymer (FRP) design provisions in North American codes.
Book Synopsis Two-way Shear Strength of Reinforced Concrete Slab-column Connections by : Leandro Sebastian Montagna
Download or read book Two-way Shear Strength of Reinforced Concrete Slab-column Connections written by Leandro Sebastian Montagna and published by . This book was released on 2018 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: To assess the two-way shear resistance, or punching shear strength, of reinforced concrete slabs, code provisions fitted from experimental data are typically employed. The experimental data forming the bases of these provisions have generally consisted of isolated slab-column connection tests that seek to represent the negative moment region of a flat plate slab. This research is focused on exploring the variation in the punching performance of slab-column connections when the typical testing conditions used to investigate isolated slab specimen are varied in a manner that produces alternative sectional loading conditions within the column connection region. To accomplish this, an innovative testing apparatus is introduced that permits alternative combinations of slab bending moment to out-of-plane shear force ratios to be applied to the slab-column connection. Results are presented from an experimental program conducted at the Ferguson Structural Engineering Laboratory (FSEL) of The University of Texas at Austin and an analysis is presented comparing the results from the tests with estimations made from current standards, the Critical Crack Shear Theory (CSCT), and also from numerical models. The data obtained from the experimental program are used to scrutinize current design and analysis procedures, and to shed light on the significance of the sectional loading conditions in the light of flat plate connection shear resisting performance.
Book Synopsis Guide to the design and construction of reinforced concrete flat slabs by :
Download or read book Guide to the design and construction of reinforced concrete flat slabs written by and published by . This book was released on 2007-01-01 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:
