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Evaluation Of Shear Strength And Design Procedure Of Steel Fiber Reinforced Concrete Exterior Beam Column Joints
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Book Synopsis Evaluation of Shear Strength and Design Procedure of Steel Fiber Reinforced Concrete Exterior Beam-column Joints by : 曾鈺軒
Download or read book Evaluation of Shear Strength and Design Procedure of Steel Fiber Reinforced Concrete Exterior Beam-column Joints written by 曾鈺軒 and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Applications of Steel Fiber Reinforced Concrete Analysis and Design by : Abdeslam Reklaoui
Download or read book Structural Applications of Steel Fiber Reinforced Concrete Analysis and Design written by Abdeslam Reklaoui and published by . This book was released on 1988 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ACI Structural Journal written by and published by . This book was released on 2009 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation and Prediction of Shear Behavior of Reinforced Concrete Beam-column Joints by : Firat Alemdar
Download or read book Evaluation and Prediction of Shear Behavior of Reinforced Concrete Beam-column Joints written by Firat Alemdar and published by . This book was released on 2007 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Beam-column joints are one of the most critical elements of reinforced concrete moment resisting frames subjected to lateral seismic loading. The older reinforced concrete buildings designed before the introduction of modern seismic codes in the early 1970's, in general, do not meet the current design code requirements. In particular, the beam-column joints in such existing buildings do not have appropriate detailing which leads to insufficient lateral strength or ductility to withstand the effects of a severe earthquake loading. Therefore, evaluation of the lateral load carrying capacity of existing buildings for subsequent retrofit is very important for the safety of the buildings. The economical aspect should also be considered during the design of a structure which is only possible if the behavior of the structure during an earthquake can be predicted. The focus of this research is to evaluate the shear behavior of reinforced concrete beam-column joints and to develop a suitable model that would predict the lateral load carrying capacity. Previous experimental studies and results have shown that the shear strength of beam-column joints depends on several variables including concrete strength, axial load ratio, joint geometry joint transverse reinforcement ratio, and displacement ductility. However, the current codes include the effects of all of these parameters in beam-column joint design. Therefore, previous analytical research is examined and this information is used to develop a shear strength model. The proposed model is mainly based on the shear strength model for columns developed by Sezen and Moehle (2004). The proposed shear strength model is verified with experimental test results. Overall, the model did a reasonable job of predicting the shear strength of reinforced concrete beam-column joints. The proposed model provides a simply tool for the analysis of existing reinforced concrete buildings subjected to lateral loading and to determine the amount of remediation necessary for satisfactory seismic performance.
Book Synopsis On Shear Behavior of Structural Elements Made of Steel Fiber Reinforced Concrete by : Estefanía Cuenca
Download or read book On Shear Behavior of Structural Elements Made of Steel Fiber Reinforced Concrete written by Estefanía Cuenca and published by Springer. This book was released on 2014-12-27 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book sheds light on the shear behavior of Fiber Reinforced Concrete (FRC) elements, presenting a thorough analysis of the most important studies in the field and highlighting their shortcomings and issues that have been neglected to date. Instead of proposing a new formula, which would add to an already long list, it instead focuses on existing design codes. Based on a comparison of experimental tests, it provides a thorough analysis of these codes, describing both their reliability and weaknesses. Among other issues, the book addresses the influence of flange size on shear, and the possible inclusion of the flange factor in design formulas. Moreover, it reports in detail on tests performed on beams made of concrete of different compressive strengths, and on fiber reinforcements to study the influence on shear, including size effects. Lastly, the book presents a thorough analysis of FRC hollow core slabs. In fact, although this is an area of great interest in the current research landscape, it remains largely unexplored due to the difficulties encountered in attempting to fit transverse reinforcement in these elements.
Book Synopsis Concrete Solutions by : Michael Grantham
Download or read book Concrete Solutions written by Michael Grantham and published by CRC Press. This book was released on 2009-06-10 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete repair continues to be a subject of major interest to engineers and technologists worldwide. The concrete repair budget for the UK alone currently runs at some UKP 220 per annum. Some estimates have indicated that, worldwide, in 2010 the expenditure for maintenance and repair work will represent about 85% of the total expenditure in the construction field. It has been forecast that, in the same year in the USA, 50 billion dollars will be spent just for the restoration of deteriorated bridges and viaducts. An understanding of the latest techniques in repair and testing and inspection is thus crucial to the international construction industry. This book, with contributions from 34 countries, brings together the best in research, practical application, strategy and theory relating to concrete repair, testing and inspection, fire damage, composites and electro-chemical repair.
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 Advances in Civil Engineering Materials by : Elham Maghsoudi Nia
Download or read book Advances in Civil Engineering Materials written by Elham Maghsoudi Nia and published by Springer Nature. This book was released on 2023-01-01 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents selected articles from the 6th International Conference on Architecture and Civil Engineering 2022 (ICACE 2022), held in Malaysia. Written by leading researchers and industry professionals, the papers highlight recent advances and addresses current issues in the fields of civil engineering and architecture.
Book Synopsis Flexural Behavior of Steel Fiber Reinforced Prestressed Concrete Beams and Double Punch Test for Fiber Reinforced Concrete by : Netra Bahadur Karki
Download or read book Flexural Behavior of Steel Fiber Reinforced Prestressed Concrete Beams and Double Punch Test for Fiber Reinforced Concrete written by Netra Bahadur Karki and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Steel fibers have widely been used in the past to reinforce brittle materials in many nonstructural applications such as pavement, tunneling lining, etc. On the basis of numerous previous studies, ACI 318-11 [2011] has recently accepted steel fiber as a minimum shear reinforcement replacement with minimum 0.75% volume fraction for both reinforced concrete and prestressed concrete members. However, not much previous research has talked about the flexural behavior of fiber reinforced concrete (FRC). As per ACI 318-11 for tension-controlled sections, the net tensile strains in the outermost layer of steel, et, should be greater than or equal to 0.005 and for the moment redistribution in continuous beam the section should sufficiently ductile (et [greater or equal to] 0.0075). For this, the sections should have small longitudinal reinforcement ratio which ultimately leads to an inefficient beam section with a large cross-sectional area. In contrast, the use of smaller concrete cross sections can lead to a diminished ductile flexural behavior as well as premature shear failure. In this context, the use of steel fiber reinforced concrete could be a potential solution since fiber can increase both the concrete shear strength and it's usable compressive strains. However limited previous researches on the flexural behavior on SFRC beams are available and most of them are of small scales and concentrated only basically for shear behavior. To the best of our knowledge, the large-scale prestressed fiber reinforced concrete beam specimens have yet to be studied for flexure behavior. In this project, six large scale prestressed concrete beams with or without steel fiber along with some material test were tested. Our experimental investigations indicated that even with inclusion of small percentage volume of fraction of steel fiber (Vf =0.75%) could not only increase the ductility and shear strength of the SFRPC beam but also change the failure pattern by increasing usable strain in concrete and steel. A modification on the limit for c/dt ratio and [phi] factor for design of flexural member given in current ACI could be proposed which could imply the smaller sections with higher longitudinal reinforcement ratio and less shear reinforcement. could be used. Any standard material test results have to ensure that FRC has, at least, been batched properly and it can give indications of probable performance when used in structures. In the current material testing method suggested by ACI, the third point bending test (ASTM C1609) has an inherent problem in that the coefficients of variations for post cracking strength and residual strength are generally very high on the order of 20%. The direct tensile test can be a more appropriate material. However, it is currently not recommended as standard method in the U.S. Because of it's difficultly in gripping arrangement which will lead to cracking of the specimen at the grips. Both the test methods also require close loop servo controlled machine. The round panel test method (ASTM C1550) requires large size specimen and heavy steel supports prevents performing test in small laboratories. Split cylinder test (ASTM C496), do not necessarily reflect the true properties of the material as the specimen is forced to fail in the line of the application of the load and the test method is also not recommended by ACI for SFRC. In order to improve the material assessment procedure, the double Punch Test (DPT) introduced by Chen in 1970 [Chen, 1970] was extensively evaluated to develop a simple, quick and reliable testing method for SFRC. Various tests were carried out in order to evaluate peak and residual strength, stiffness, strain hardening and softening, toughness and other post crack properties. Our test results indicated that the DPT method could be immersed as reliable, easier and economical material test method. It could be used to distinguish the peak strength, residual strength, toughness stiffness and crack resistance, of different SFRC mixtures with less scatter results compared to other material test methods.
Book Synopsis FRP Composites in Civil Engineering - CICE 2004 by : R. Seracino
Download or read book FRP Composites in Civil Engineering - CICE 2004 written by R. Seracino and published by CRC Press. This book was released on 2004-12-15 with total page 1005 pages. Available in PDF, EPUB and Kindle. Book excerpt: The range of fibre-reinforced polymer (FRP) applications in new construction, and in the retrofitting of existing civil engineering infrastructure, is continuing to grow worldwide. Furthermore, this progress is being matched by advancing research into all aspects of analysis and design. The Second International Conference on FRP Composites in
Book Synopsis Seismic Performance of Corroded Reinforced Concrete Structures Retrofitted with FRP by : Dejian Shen
Download or read book Seismic Performance of Corroded Reinforced Concrete Structures Retrofitted with FRP written by Dejian Shen and published by Springer Nature. This book was released on with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :fib Fédération internationale du béton Publisher :fib Fédération internationale du béton ISBN 13 :2883940975 Total Pages :274 pages Book Rating :4.8/5 (839 download)
Book Synopsis Shear and Punching Shear in RC and FRC Elements by : fib Fédération internationale du béton
Download or read book Shear and Punching Shear in RC and FRC Elements written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2010-12-01 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: fib Bulletin 57 is a collection of contributions from a workshop on "Recent developments on shear and punching shear in RC and FRC elements", held in Salò, Italy, in October 2010. Shear is one of a few areas of research into fundamentals of the behaviour of concrete structures where contention remains amongst researchers. There is a continuing debate between researchers from a structures perspective and those from a materials or fracture mechanics perspective about the mechanisms that enable the force flow through a concrete member and across cracks. In 2009, a Working Group was formed within fib Task Group 4.2 "Ultimate Limit State Models" to harmonise different ideas about design procedures for shear and punching. An important outcome of this work was the ensuing discussions between experts and practitioners regarding the shear and punching provisions of the draft fib Model Code, which led to the organization of the Salò workshop. Invited experts in the field of shear and FRC gave 18 lectures at the workshop that was attended by 72 participants from 12 countries in 3 different continents. The contributions from this conference as compiled in this bulletin are believed to represent the best of the current state of knowledge. They certainly are of general interest to fib members and especially helpful in the finalization of the 2010 fibModel Code. It is hoped that this publication will stimulate further research in the field, to refine and harmonize the available analytical models and tools for shear and punching design.
Book Synopsis Bond Strength of Steel Fiber Reinforced Concrete Under Cyclical Loads by : Kurt Paul Katsumata
Download or read book Bond Strength of Steel Fiber Reinforced Concrete Under Cyclical Loads written by Kurt Paul Katsumata and published by . This book was released on 1983 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ACI Materials Journal written by and published by . This book was released on 2004 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of Italian Concrete Conference 2020/21 by : Marco di Prisco
Download or read book Proceedings of Italian Concrete Conference 2020/21 written by Marco di Prisco and published by Springer Nature. This book was released on 2023-09-09 with total page 771 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the peer-reviewed papers presented at the Italian Concrete Conference 2020, held on April 14-17, 2021. The conference topics encompass the aspects of design, execution, rehabilitation and control of concrete structures, with particular reference to theory and modeling, applications and realizations, materials and investigations, technology and construction techniques. The contributions amply demonstrate that today’s structural concrete applications concern not only new constructions, but more and more rehabilitation, conservation, strengthening and seismic upgrading of existing buildings, and that requirements cover new aspects within the frame of sustainability, including environmental friendliness, durability, adaptability and reuse of works and / or materials. As such, the book represents an invaluable, up-to-the-minute tool, providing an essential overview of structural concrete, as well as all of new materials with cementitious matrices.
Book Synopsis Strength, Deformation, and Seismic Resistance of Joints Between Steel Beams and Reinforced Concrete Columns by : Ryoichi Kanno
Download or read book Strength, Deformation, and Seismic Resistance of Joints Between Steel Beams and Reinforced Concrete Columns written by Ryoichi Kanno and published by . This book was released on 1993 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Strength-enhancement Mechanism and Size Effect on Ultimate Shear Strength of Steel Fiber-Reinforced Concrete (SFRC) Slender Beams by : Mohammad Reza Zarrinpour
Download or read book Investigation of Strength-enhancement Mechanism and Size Effect on Ultimate Shear Strength of Steel Fiber-Reinforced Concrete (SFRC) Slender Beams written by Mohammad Reza Zarrinpour and published by . This book was released on 2019 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research study consists of two separate phases. In the first phase, an experimental study was conducted to identify the shear-enhancement and failure mechanisms behind the ultimate shear strength of steel fiber-reinforced concrete (SFRC) slender beams by utilizing the full field deformation measuring capability of digital image correlation (DIC) technology. A total of 12 large-scale simply supported SFRC and RC beams with a range of heights including 12 in. (305 mm), 18 in. (457 mm), 24 in. (610 mm),36 in. (915 mm), and 48 in. (1220 mm) were tested under monotonic point load. The greater shear strength in SFRC beams stems from the fiber bridging effect which delays the propagation of the cracks into the compression zone. In contrast to the traditional assumption for either plain concrete or SFRC beams, where the shear contribution resulting from dowel action is completely neglected, this research clearly shows that the dowel action has an appreciable effect on the ultimate shear strength. Its contribution varies from 10% to 30% as the beam depth increases from 12 in. (305 mm) to 48 in. (1220 mm). On the other hand, the compression zone's contribution decreases from 69% to 36%with the increase in beam depth. In addition, the shear contribution from the fiber bridging effect along the critical shear crack stays virtually unchanged at 20%, regardless of beam depth. In this study, the minimum shear strength obtained was in the range of 5 SQRT (f'c) psi (0.42 SQRT (f'c) MPa) for the beams with the greatest depth. This indicates that the maximum allowed shear stress limit of 1.5 SQRT (f'c) psi (0.125 SQRT (f'c) MPa) specified in ACI 318-14 is on the very conservative side. While the size effect on ultimate shear strength of plain concrete beams has been well researched in the past decades, limited tests were carried out to study the extent and mechanism of size effect in steel fiber-reinforced concrete (SFRC) beams. Current American Concrete Institute's ACI 318 Building Code restricts the use of steel fiber as minimum shear reinforcement to beams with a height up to 24 in. (610 mm). In the next phase of the study, in addition to the analyzing of the current testing data, the laboratory test results from the first part of the study and the respective digital image correlation (DIC) images were examined to identify the underlying factors that cause size effect on ultimate shear stress of SFRC slender beams. Moderate size effect was observed in the beams tested in this study. Through the full field strains and a mechanical based analysis, it was found that the size effect is a function of both the beam height and the shear span length.In larger beams, due to the greater horizontal and vertical distance from the compression zone to the supports, the critical diagonal shear crack was able to propagate deeply into the top of the beams. As a consequence, the compression zone exhibits less contribution to shear resistance in larger size beams, and the dowel action becomes more critical. Therefore, a minor flaw in dowel zone such as lacking well-distribution of steel fibers results in early destruction of dowel resistance and shear failure.
