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Shear Behavior Of Prestressed Concrete U Beams
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Book Synopsis Shear Behavior of Prestressed Concrete U-beams by : Andrew Michael Moore
Download or read book Shear Behavior of Prestressed Concrete U-beams written by Andrew Michael Moore and published by . This book was released on 2010 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study was conducted at the Ferguson Structural Engineering Laboratory in order to investigate the shear behavior of 54-inch deep prestressed concrete U-beams. The primary goal of this research was to improve the design and detailing of the skewed end-blocks commonly used in these beams. As U-beams had been in service for several decades without incident, it was anticipated that there would be little need for change in the design, and the findings of the research would involve a slight tweaking to improve the overall performance. Unfortunately, during the first phase of shear testing (testing of the current design standard) it was found that the U-beam was not reaching the code calculated shear capacity. During this phase of testing the premature failure mechanism was isolated as the breakdown of the web-to-flange interface in the end region of the girder. Therefore, the second phase of testing sought to prevent the breakdown of this boundary by three options: (1) increasing the web width while maintaining current levels of mild reinforcement, (2) increasing the web width while also increasing the amount of reinforcement crossing the web-to-flange boundary, or (3) by increasing the amount of reinforcement at the boundary while maintaining the current web width. Two acceptable solutions to the premature failure method were developed and tested during this phase both of which included an increase in the amount of mild reinforcement crossing the web-to-flange interface (with and without an increase in web width). The research into refining of these new details is ongoing as part of the Texas Department of Transportation's Research Project number 0-5831.
Book Synopsis Shear Behavior of Prestressed Concrete Beams Using Fiber Reinforced Plastic Tendons by : Sang Yeol Park
Download or read book Shear Behavior of Prestressed Concrete Beams Using Fiber Reinforced Plastic Tendons written by Sang Yeol Park and published by . This book was released on 1997 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Shear Behavior of Reinforced Concrete Beams and Prestressed Concrete Beams by : Kang Su Kim
Download or read book Shear Behavior of Reinforced Concrete Beams and Prestressed Concrete Beams written by Kang Su Kim and published by . This book was released on 2004 with total page 950 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Shear Behavior of Steel Fiber Reinforced Prestressed Concrete Beams Without Shear Reinforcement by : Jae-Sung Cho
Download or read book Shear Behavior of Steel Fiber Reinforced Prestressed Concrete Beams Without Shear Reinforcement written by Jae-Sung Cho and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The ACI 318-08 building code allows to use the steel fiber reinforcement as alternative shear reinforcement with satisfying certain criteria when a beam is required minimum shear reinforcement. However, this provision applies to a nonprestressed and prestressed concrete beam such that it could be conservative since the shear strength of prestressed concrete beam is generally enhanced due to the prestressing force. This is due partially to the fact that the provision has been accepted based on researches, mostly conducted in nonprestressed concrete beam. Most of experiments conducted for prestressed concrete beam in small scale tests, with a height of specimens were less than 10 in. A larger scale of experiment is required due to concerns of size effect. In addition, in order to evaluate the qualification of a Steel Fiber Reinforced Concrete (SFRC) mixture used for structural applications, such as increasing shear resistance, a material evaluation method is essential. Currently ASTM or ACI Committee 544 (Fiber-Reinforced Concrete) does not recommend any standardized test method for evaluating shear performance of a particular SFRC material. This study addresses the research gaps described above by testing large-scale Steel Fiber Reinforced Prestressed Concrete (SFRPC) beams as well as developing a simple laboratory test techniques. A total 13 simply-supported beams for large-scale test with a shear span to effective depth ratio of 3.0 and a height of 24 in. were subjected to monotonically-increased, concentrated load. The test parameters were mainly included compressive strength, volume fraction of steel fibers, compressive reinforcement ratio. The results of large-scale test showed that the use of hooked steel fibers in a volume fraction greater than or equal to 0.50% volume fraction of steel fibers (67 lb per cubic yard), which is less than requirement by ACI 318-08 (0.75%, 100 lb per cubic yard), led to substantial enhancement of shear behaviors including the first cracking, the ultimate, and ductility. High compressive strength of SFRC, greater than 9000 psi, which is higher than ACI 318-08 requirement (less than 6000 psi) could be used as well. However, there was no significant effect from compressive reinforcement ratio. A simply shear test method for SFRC was proposed in this study. The test apparatus is almost exactly the same as the conventional ASTM bending test with only minor modification, in addition, it could simulate a pure shear stress by adjusting loading and support positions. By introducing a proper reinforcement for bending stress, it was possible to evaluate shear performance of SFRC with clear and uncomplicated shear stress field in the critical section.
Book Synopsis Shear Strength and Behavior of Prestressed Concrete Beams by : Alejandro Raul Avendaño Valderrama
Download or read book Shear Strength and Behavior of Prestressed Concrete Beams written by Alejandro Raul Avendaño Valderrama and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Behavior of Prestressed Concrete Beams Subjected to Combined Bending and Shear as Studied by the Use of Small Scale Models by : Sennen Kee-sum Chow
Download or read book The Behavior of Prestressed Concrete Beams Subjected to Combined Bending and Shear as Studied by the Use of Small Scale Models written by Sennen Kee-sum Chow and published by . This book was released on 1972 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Shear Behavior and Design of Prestressed Concrete Members by : Arghadeep Laskar
Download or read book Shear Behavior and Design of Prestressed Concrete Members written by Arghadeep Laskar and published by . This book was released on 2009 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Shear Behavior of Fiber Reinforced Concrete Beams with Stirrups by : Sugiarto Loni
Download or read book Shear Behavior of Fiber Reinforced Concrete Beams with Stirrups written by Sugiarto Loni and published by . This book was released on 1983 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Performance of Texas U-beams at Prestress Transfer and Under Shear-critical Loads by : Catherine Grace Hovell
Download or read book Structural Performance of Texas U-beams at Prestress Transfer and Under Shear-critical Loads written by Catherine Grace Hovell and published by . This book was released on 2011 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Texas U-Beam standard designs were released in the 1990's and have been used increasingly in bridges across the state since. While prototypes of the 54-in. deep prestressed concrete beam were built during the design phase, no full-scale load tests were performed. This study of the U-Beam had five goals: (i) determine the magnitude and location of stresses induced in reinforcing bars in the end region of the beam at prestress transfer, (ii) measure concrete curing temperatures in square and skewed end blocks, (iii) establish the vertical shear capacity of the standard section, (iv) evaluate interaction between behavior at prestress transfer and performance under shear-critical loads, and (v) identify design and detailing improvements and make recommendations. Eight full-scale Texas U54 prestressed concrete beams were fabricated to achieve these goals. Load testing of the first four of these beams revealed a critical weakness along the bottom flange-to-web interface of the beam. The weakness caused failures that occurred at loads well below the calculated shear capacity. Given the horizontal sliding observed, the failure mode was called horizontal shear. The next two beams were fabricated to test three modifications to the end-region design, two of which were deemed successful. The final two beam sections tested contained the recommended new standard reinforcement and concrete geometry. A method to evaluate the horizontal shear demand on and capacity of the bottom flange-to-web interface of prestressed concrete beams was developed. The calculations were formulated using the theories of beam bending and shear friction. This method was calibrated and verified using the U-Beam test data, a series of small-scale specimens, and results of shear tests in the literature. Stresses induced in reinforcing bars at prestress transfer met expectations set by existing codified equations. No modifications to the current U-Beam standard design are needed to manage these stresses. The induced stresses did not influence vertical shear behavior, and no interaction between the two is believed to exist for U-Beams. This dissertation contains the specifics of the beams tested and the data collected, and provides the details of recommended changes to the Texas U-Beam standard drawings.
Book Synopsis Shear Strength of Concrete Beams Prestressed with CFRP Cables by : Mirpayam Nabipaylashgari
Download or read book Shear Strength of Concrete Beams Prestressed with CFRP Cables written by Mirpayam Nabipaylashgari and published by . This book was released on 2012 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates the shear capacity of concrete T-beams prestressed with CFRP cables (CFCC) and contributes to the scarce research available for shear behavior of FRP prestressed concrete beams. Four beams are tested under distributed load, while twelve beams are tested under four point bending. Three different a/d ratios of 1.5, 2.5 and 3.5 are investigated. The results show that the shear capacity of the beams increases significantly when a/d is reduced below 2.5. The effect of FRP stirrups on the shear capacity of the beams is investigated and it is shown that the minimum required stirrups according to CSA-S6-10 are ineffective in deep beams with a/d = 1.5. The accuracy of current North American shear design formulas for FRP prestressed concrete beams subjected to four-point bending and distributed load is evaluated. The available strut and tie models are studied for determining the shear capacity of FRP prestressed deep beams.
Book Synopsis Ultra-High Performance Concrete UHPC by : Ekkehard Fehling
Download or read book Ultra-High Performance Concrete UHPC written by Ekkehard Fehling and published by John Wiley & Sons. This book was released on 2015-04-20 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected chapters from the German concrete yearbook are now being published in the new English "Beton-Kalender Series" for the benefit of an international audience. Since it was founded in 1906, the Ernst & Sohn "Beton-Kalender" has been supporting developments in reinforced and prestressed concrete. The aim was to publish a yearbook to reflect progress in "ferro-concrete" structures until - as the book's first editor, Fritz von Emperger (1862-1942), expressed it - the "tempestuous development" in this form of construction came to an end. However, the "Beton-Kalender" quickly became the chosen work of reference for civil and structural engineers, and apart from the years 1945-1950 has been published annually ever since. Ultra high performance concrete (UHPC) is a milestone in concrete technology and application. It permits the construction of both more slender and more durable concrete structures with a prolonged service life and thus improved sustainability. This book is a comprehensive overview of UHPC - from the principles behind its production and its mechanical properties to design and detailing aspects. The focus is on the material behaviour of steel fibre-reinforced UHPC. Numerical modelling and detailing of the connections with reinforced concrete elements are featured as well. Numerous examples worldwide - bridges, columns, facades and roofs - are the basis for additional explanations about the benefits of UHPC and how it helps to realise several architectural requirements. The authors are extensively involved in the testing, design, construction and monitoring of UHPC structures. What they provide here is therefore a unique synopsis of the state of the art with a view to practical applications.
Book Synopsis Behavior of Retangular Prestressed Concrete Beams Under Combined Torsion, Bending, and Shear by : Robert Lee Henry
Download or read book Behavior of Retangular Prestressed Concrete Beams Under Combined Torsion, Bending, and Shear written by Robert Lee Henry and published by . This book was released on 1971 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study on the Shear Behavior of Prestressed Concrete Hollow Core Slabs by Nonlinear Finite Element Modelling by : Xuefei Wang
Download or read book Study on the Shear Behavior of Prestressed Concrete Hollow Core Slabs by Nonlinear Finite Element Modelling written by Xuefei Wang and published by . This book was released on 2007 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FRP written by J. G. Teng and published by John Wiley & Sons. This book was released on 2002 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fibre-reinforced polymer (FRP) composites are used to strengthen reinforced concrete (RC) structures. A large amount of research now exists on this. This book brings together all existing research into one volume.
Book Synopsis Durability and Behavior of Prestressed Concrete Beams by : E. C. Roshore
Download or read book Durability and Behavior of Prestressed Concrete Beams written by E. C. Roshore and published by . This book was released on 1971 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Durability and Behavior of Prestressed Concrete Beams by : Edward F. O'Neil
Download or read book Durability and Behavior of Prestressed Concrete Beams written by Edward F. O'Neil and published by . This book was released on 1976 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of SECON 2020 by : Kaustubh Dasgupta
Download or read book Proceedings of SECON 2020 written by Kaustubh Dasgupta and published by Springer Nature. This book was released on 2020-11-20 with total page 959 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers peer-reviewed contributions presented at the 1st International Conference on Structural Engineering and Construction Management (SECON’20), held in Angamaly, Kerala, India, on 14-15 May 2020. The meeting served as a fertile platform for discussion, sharing sound knowledge and introducing novel ideas on issues related to sustainable construction and design for the future. The respective contributions address various aspects of numerical modeling and simulation in structural engineering, structural dynamics and earthquake engineering, advanced analysis and design of foundations, BIM, building energy management, and technical project management. Accordingly, the book offers a valuable, up-to-date tool and essential overview of the subject for scientists and practitioners alike, and will inspire further investigations and research.
