Experimental Study Of Flexural Behavior Of Preflex Sfrc Encased Steel Joist Composite Beams
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Experimental Study Of Flexural Behavior Of Preflex Sfrc Encased Steel Joist Composite Beams
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Author : Niraj Narendra Bora
language : en
Publisher:
Release Date : 2020
Experimental Study Of Flexural Behavior Of Preflex Sfrc Encased Steel Joist Composite Beams written by Niraj Narendra Bora and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
This study investigates the behavior of encased steel composite beams in straight and preflex beams, constructed and tested at Civil Engineering Laboratory Building (CELB). Upwards camber is provided in the steel sections in steel angles and HSS tube in the composite beam encased in Steel fibers reinforced concrete (SFRC). Experimental procedure has been performed to study the flexural behavior of composite steel joists encased in SFRC. Compressive strength, tensile strength and modulus of rupture are computed. The physical properties of steel fiber reinforced concrete are calculated through testing at the UTA Civil Engineering Laboratory Building. Eighteen cylindrical (4"x8") specimens, eighteen beams encased with Double angle (6"x6"x20"), eighteen beams encased with HSS steel beams (6"x6"x20") were prepared and tested after 28 days of curing. The specimens were tested for their compressive strength, tensile strength, and modulus of rupture. The results showed that compressive strength increased by 45% with adding steel fibers of 1% by volume in concrete. Also, addition of 1% steel fibers by volume increases the tensile strength by 33% as compared to 0% steel fibers by volume. The experimental results showed that, cambering of double angles in concrete beam increases the ultimate load capacity by 10% while midspan deflection reduces by 25% relative to straight section in concrete beam. The study investigates flexural behavior HSS and double angle encased concrete beams, while results shows approximately similar performance for both type of beams. Use of steel fibers reinforced concrete is also an advantage to increase the flexural capacity of beam and to reduction in midspan. Adding 1% volume fraction of steel fibers to increases the ultimate load capacity by 30% and reduces the midspan deflection by 41% comparative to concrete without steel fibers. This study shows that, there is significant improvement in the flexural capacity of beam with the provision of cambering and addition of steel fibers. Preflex Encased steel Joist Composite Beams are innovative structural members that provides more strength to structures with long spans like long span bridges, because it requires girders of large flexural capacity.
Flexural Behavior Of Preflex Sfrc Encased Steel Joist Composite Beams
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Author : Nancy Thazhampallatu Varughese
language : en
Publisher:
Release Date : 2019
Flexural Behavior Of Preflex Sfrc Encased Steel Joist Composite Beams written by Nancy Thazhampallatu Varughese and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
This research investigates the behavior of encased steel composite beams within steel fiber reinforced concrete (SFRC) in straight and preflex beams, using nonlinear analysis. ABAQUS FEA software has been adopted. Composite steel beams encased in fiber reinforced concrete are analyzed and a comparison is made with available experimental results. Good agreement with the experimental results is observed. Upwards camber of the steel section is introduced on the steel joist. It's found that the preflex section can increase the ultimate load capacity by 10% and decrease midspan displacement by 13% of the same beams without the preflex steel section. Steel fiber dosages, compressive strength, modulus of rupture are examined. The effect of cambering and mesh refinement are also investigated. The physical properties of SFRC are calculated through testing at the UTA Civil Engineering Laboratory Building. In total, nine (4" x 8") cylindrical specimens, nine (6" x 8") cylindrical specimens, and nine (6" x 6" x 20") beam specimens were produced and tested for their compressive strength, tensile strength, and modulus of rupture after 28 days of curing. The addition of steel fiber will lead to a significant increase in tensile strength and modulus of rupture of concrete. Adding 1% steel fibers by volume can increase the load capacity by 33% and decrease the midspan displacement by 70% in comparison to the same beam using plain concrete. The increase in steel fibers and cambering show an improvement to the flexural capacity and cracking point of the beam, which can provide more strength to structures such as long span bridges.
Flexural Behavior Of Steel Fiber Reinforced Prestressed Concrete Beams And Double Punch Test For Fiber Reinforced Concrete
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Author : Netra Bahadur Karki
language : en
Publisher:
Release Date : 2012
Flexural Behavior Of Steel Fiber Reinforced Prestressed Concrete Beams And Double Punch Test For Fiber Reinforced Concrete written by Netra Bahadur Karki and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Fiber-reinforced concrete categories.
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.
Frp
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Author : J. G. Teng
language : en
Publisher: John Wiley & Sons
Release Date : 2002
Frp written by J. G. Teng and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Technology & Engineering categories.
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.
Introduction To Aerospace Materials
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Author : Adrian P Mouritz
language : en
Publisher: Elsevier
Release Date : 2012-05-23
Introduction To Aerospace Materials written by Adrian P Mouritz and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-05-23 with Technology & Engineering categories.
The structural materials used in airframe and propulsion systems influence the cost, performance and safety of aircraft, and an understanding of the wide range of materials used and the issues surrounding them is essential for the student of aerospace engineering.Introduction to aerospace materials reviews the main structural and engine materials used in aircraft, helicopters and spacecraft in terms of their production, properties, performance and applications. The first three chapters of the book introduce the reader to the range of aerospace materials, focusing on recent developments and requirements. Following these introductory chapters, the book moves on to discuss the properties and production of metals for aerospace structures, including chapters covering strengthening of metal alloys, mechanical testing, and casting, processing and machining of aerospace metals. The next ten chapters look in depth at individual metals including aluminium, titanium, magnesium, steel and superalloys, as well as the properties and processing of polymers, composites and wood. Chapters on performance issues such as fracture, fatigue and corrosion precede a chapter focusing on inspection and structural health monitoring of aerospace materials. Disposal/recycling and materials selection are covered in the final two chapters. With its comprehensive coverage of the main issues surrounding structural aerospace materials,Introduction to aerospace materials is essential reading for undergraduate students studying aerospace and aeronautical engineering. It will also be a valuable resource for postgraduate students and practising aerospace engineers. Reviews the main structural and engine materials used in aircraft, helicopters and space craft in terms of their properties, performance and applications Introduces the reader to the range of aerospace materials, focusing on recent developments and requirements, and discusses the properties and production of metals for aerospace structures Chapters look in depth at individual metals including aluminium, titanium, magnesium, steel and superalloys
Design Production And Placement Of Self Consolidating Concrete
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Author : Kamal Henri Khayat
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-08-12
Design Production And Placement Of Self Consolidating Concrete written by Kamal Henri Khayat and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-08-12 with Technology & Engineering categories.
Dear Colleagues, We are pleased to organize the Sixth International RILEM Symposium on SCC and the Fourth North-American Conference on the Design and Use of SCC, held on Sept 26-29, 2010 in Montreal, Quebec, Canada. The RILEM series of symposia started in 1999 in Stockholm, followed by Tokyo in 2001, Reykjavik in 2003, Chicago in 2005, and Ghent in 2007 with a steadily increasing number of papers, participants, and interest from across the globe. Due to the growing success of SCC, regional conferences have been organized, such as the North-American Conference on the Design and Use of SCC held in Chicago in 2002, 2005, and 2008; the International Symposium on Design, Performance and Use of SCC held nd in Changsa, China in 2005 and in Beijing, China in 2009; as well as the 2 International Conference on Advances in Concrete Technology in the Middle East: SCC held in Abu Dhabi in 2009. It can be concluded that these regional Conferences and Symposia were highly successful and reached a far more international audience than anticipated. Nearly 100 papers were submitted for these proceedings from which the International Scientific Committee selected 37 contributions covering a wide range of timely and original subjects from around the world. We would like to acknowledge the input of the International Scientific Committee for providing critical input to guarantee high quality of these peer-reviewed proceedings. We invite you to explore a wealth of information in the electronic proceedings.
Design Of Blast Resistant Buildings In Petrochemical Facilities
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Author : Society of Civil Engineers. Task Committee on Blast Resistant Design
language : en
Publisher: Amer Society of Civil Engineers
Release Date : 2010
Design Of Blast Resistant Buildings In Petrochemical Facilities written by Society of Civil Engineers. Task Committee on Blast Resistant Design and has been published by Amer Society of Civil Engineers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Technology & Engineering categories.
This updated edition provides general guidelines for the structural design of blast-resistant petrochemical facilities. Information is provided for U.S. Occupational Safety and Health Administration (OSHA) requirements, design objectives, siting considerations, and load determination, and references cite sources of detailed information. Detailed coverage is provided for types of construction, dynamic material strengths, allowable response criteria, analysis methods, and design procedures. Typical details and ancillary considerations, such as doors and windows, are also included. A how-to discussion on the upgrade of existing buildings is provided for older facilities which may not meet current needs. Three example calculations are included to illustrate design procedures.
Productivity In Construction Projects
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Author : Ted Trauner
language : en
Publisher: John Wiley & Sons
Release Date : 2022-11-01
Productivity In Construction Projects written by Ted Trauner and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-11-01 with Technology & Engineering categories.
PRODUCTIVITY IN CONSTRUCTION PROJECTS From planning/design to post-construction, this valuable guide provides the construction industry the key to understanding the importance of properly tracking and measuring productivity, resulting in increased efficiency and profitability for contractors, subcontractors, owners, civil and construction engineers, and attorneys. Productivity in Construction Projects anticipates and answers the questions of owners, contractors, sub-contractors, and construction professionals to avoid cost overruns in a specific area of work, or when activities are taking more resources to perform than planned. Packed with real-world case studies, Productivity in Construction Projects’ thirteen chapters move beyond the symptoms and provide a remedy. This book provides a comprehensive look at how to: Complete more projects on time and budget, and earn greater profits and future business. Track and analyze productivity on construction projects, and quantify additional costs resulting from productivity losses. Select the right experts and attorneys should litigation or arbitration occur, and employ credible and reliable methods of analysis. Solve problems on the project instead of incurring lengthy and costly litigation or arbitration.
Structural Design For Physical Security
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Author : Task Committee on Structural Design for Physical Security
language : en
Publisher: ASCE Publications
Release Date : 1999-01-01
Structural Design For Physical Security written by Task Committee on Structural Design for Physical Security and has been published by ASCE Publications this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999-01-01 with Technology & Engineering categories.
Prepared by the Task Committee on Structural Design for Physical Security of the Structural Engineering Institute of ASCE. This report provides guidance to structural engineers in the design of civil structures to resist the effects of terrorist bombings. As dramatized by the bombings of the World Trade Center in New York City and the Murrah Building in Oklahoma City, civil engineers today need guidance on designing structures to resist hostile acts. The U.S. military services and foreign embassy facilities developed requirements for their unique needs, but these the documents are restricted. Thus, no widely available document exists to provide engineers with the technical data necessary to design civil structures for enhanced physical security. The unrestricted government information included in this report is assembled collectively for the first time and rephrased for application to civilian facilities. Topics include: determination of the threat, methods by which structural loadings are derived for the determined threat, the behavior and selection of structural systems, the design of structural components, the design of security doors, the design of utility openings, and the retrofitting of existing structures. This report transfers this technology to the civil sector and provides complete methods, guidance, and references for structural engineers challenged with a physical security problem.
Bond Behaviour Of Frp In Structures
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Author : J. F. Chen
language : en
Publisher:
Release Date : 2005
Bond Behaviour Of Frp In Structures written by J. F. Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Composite materials categories.