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Shear Behaviour Of Steel Fibre Reinforced High Strength Lightweight Concrete Beams Without Web Reinforcement
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Book Synopsis Shear Behaviour of Steel Fibre-reinforced High Strength Lightweight Concrete Beams Without Web Reinforcement by : Fahad Alzahrani
Download or read book Shear Behaviour of Steel Fibre-reinforced High Strength Lightweight Concrete Beams Without Web Reinforcement written by Fahad Alzahrani and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this investigation was to determine the influence of adding two different shapes with different lengths of steel fibres on the shear behaviour of lightweight and normal weight concrete beams with normal and high concrete grades. Thirty-six prisms of (100 mm wide, 100 mm deep, and 400 mm long) and seventy two cylindrical samples of (100 mm diameter 200 mm high) were cast and tested to determine the concrete mechanical properties for specimens. These samples were tested in order to discover the role of steel fibres on enhancing concrete properties in general. The modulus of rupture, flexural toughness, toughness, compressive strength and splitting tensile strength were inspected based on the small-scaled material samples. In the structural experiment, a group of twelve large-scaled reinforced concrete beams without shear reinforcement were primarily analyzed, designed and tested in the structures lab at Memorial University of Newfoundland (MUN). These specimens were built to study the load-deflection curves, shear and flexural behaviour, concrete and steel strains and the ultimate load resistance. Simply supported beams with dimensions of (200 mm wide, 400 deep, and 2900 mm long) were structurally tested, analyzed and discussed. in order to investigate the previous responses. Three factors were proposed in this experiment. The first factor was the type of the aggregates and the second parameter taken into consideration was the concrete compressive strength that divided the beams into two groups of high and normal strengths. Thirdly, two different lengths of steel fibres with different end-shapes were considered as the third variable in order to evaluate the effects of the length of the steel fibres on the shear behaviour. All beams contained 1.46% of longitudinal tension reinforcement ratio. Besides this, a fixed concrete cross section was suggested for all beams. Testing specimens were setup on a specified constant shear span-to-depth ratio of 3. According to a recommendation by ACI, a fixed volume fraction of 0.75% of steel fibres was added to SFRC beams. The specimens with long fibres resisted higher shear stresses and were more ductile than the ones reinforced with shorter fibres. Overall, the presence of both short and long steel fibres improved beams shear resistance by a range varied from 35% to 72% compared to reference RC beams. However, shear strength of beams with long steel fibres enhanced more by an average amount of 10% in contrast with short SFs beams.
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 Behavior of Steel -fiber Reinforced Ultra- High-strength Self -compacted Concrete Beams by : Omar Jumah Zaal Rawashdeh
Download or read book Shear Behavior of Steel -fiber Reinforced Ultra- High-strength Self -compacted Concrete Beams written by Omar Jumah Zaal Rawashdeh and published by . This book was released on 2015 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-high-strength concrete is a new class of concrete that has been the result of the progress in concrete material science and development. This new type of concrete is characterized with very high compressive strength; about 100 MPa. Ultra-high strength concrete shows very brittle failure behavior compared to normal-strength concrete. Steel fibers will significantly reduce the workability of ultra-high strength concrete. The development and use of self-compacting concrete has provided a solution to the workability issue. The combination of technology and knowledge to produce Ultra-High strength fiber reinforced self-compacting concrete was proved to be feasible. Few studies investigated the effect of incorporating steel fibers on the shear behavior of ultra-high-strength reinforced concrete beams. The research consists of a test series and analytical investigation. The present research investigated the shear behavior of reinforced beams made of normal-strength-concrete fiber-reinforced self-compacting concrete (28 MPa), high-strength concrete fiber-reinforced self-compacting concrete (60 MPa) and ultra-high-strength fiber-reinforced self-compacting concrete (100 MPa). The test parameters included two different shear span-to-depth ratios of 2.22 (deep beam action) and 3.33 (slender beam action), and three different steel fiber volume fractions of 0.4%, 0.8%, and 1.2%. The test results showed that the shear strength gain ranged from 20% to 129% for the beams having a concrete grade of 28 MPa, 26% to 63% for the beams having a concrete grade of 60 MPa, and 8.6% to 94% for the beams with a concrete grade of 100 MPa. For the deep beams, the shear strength gain tended to decrease by increasing the concrete grade. For the slender beams with steel fiber volume fractions of 0.4% and 0.8%, varying the concrete grade had no obvious effect on the shear strength gain. For the viii slender beams with the higher steel fiber volume fraction of 1.2%, the shear strength gain tended to decrease with an increase in the concrete grade. In the analytical investigation, the accuracy and validity of published analytical models have been demonstrated. Predictions of analytical models by Ashour et al. (1992) and Narayanan et al. (1987) were in good agreement with the experimental results.
Book Synopsis Fibre Reinforced Concrete: Improvements and Innovations by : Pedro Serna
Download or read book Fibre Reinforced Concrete: Improvements and Innovations written by Pedro Serna and published by Springer Nature. This book was released on 2020-11-05 with total page 1180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume highlights the latest advances, innovations, and applications in the field of fibre reinforced concrete (FRC) and discusses a diverse range of topics concerning FRC: rheology and early-age properties, mechanical properties, codes and standards, long-term properties, durability, analytical and numerical models, quality control, structural and Industrial applications, smart FRC’s, nanotechnologies related to FRC, textile reinforced concrete, structural design and UHPFRC. The contributions present improved traditional and new ideas that will open novel research directions and foster multidisciplinary collaboration between different specialists. Although the symposium was postponed, the book gathers peer-reviewed papers selected in 2020 for the RILEM-fib International Symposium on Fibre Reinforced Concrete (BEFIB).
Book Synopsis Guide for the Design and Construction of Concrete Reinforced with Fiber-Reinforced Polymer Bars by : ACI Committee 440
Download or read book Guide for the Design and Construction of Concrete Reinforced with Fiber-Reinforced Polymer Bars written by ACI Committee 440 and published by . This book was released on 2003 with total page 42 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 Reinforced Concrete Deep Beams by : F K Kong
Download or read book Reinforced Concrete Deep Beams written by F K Kong and published by CRC Press. This book was released on 1991-05-01 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contents of this book have been chosen with the following main aims: to review the present coverage of the major design codes and the CIRIA guide, and to explain the fundamental behaviour of deep beams; to provide information on design topics which are inadequately covered by the current codes and design manuals; and to give authoritative revie
Book Synopsis Shear Strength of Lightweight Reinforced Concrete Beams by : Portland Cement Association. Development Department
Download or read book Shear Strength of Lightweight Reinforced Concrete Beams written by Portland Cement Association. Development Department and published by . This book was released on 1958 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fibrous Concrete by : Concrete Society
Download or read book Fibrous Concrete written by Concrete Society and published by . This book was released on 1980 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Shear Strength of Structural Elements in High Performance Fibre Reinforced Concrete (HPFRC) by : Lionel Moreillon
Download or read book Shear Strength of Structural Elements in High Performance Fibre Reinforced Concrete (HPFRC) written by Lionel Moreillon and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: For members and flat slabs without shear reinforcement, the shear and punching shear strength are often the determining design criteria. These failure modes are characterized by a fragile behaviour implying possible partial or total collapse of the structure. Despite extensive research in this field, shear and punching shear in reinforced and prestressed concrete structures, remain complex phenomena so much that the current approach is often empirical or simplified. The ability of Steel Fibre Reinforced Concrete (SFRC) to reduce shear reinforcement in reinforced and prestressed concrete members and slabs,or even eliminate it, is supported by several experimental studies. However its practical application remains marginal mainly due to the lack of standard, procedures and rules adapted to its performance. The stationary processes in precast industry offer optimal possibilities for using high performance cementitious materials such as Self Compacting Concrete (SCC) and High Strength Concrete (HSC). For the author, the combination of High Performance Concrete and steel fibres is the following step in the development and the optimization of this industry. The High Performance Fibre Reinforced Concrete (HPFRC) stands between conventional SFRC and Ultra-High Performance Fibre Reinforced Concrete (UHPFRC). The HPFRC exhibiting a good strength/cost ratio is, thus, an alternative of UHPFRC for precast elements. The principal aim of this work was to analyse the shear and punching shear behaviour of HPFRC and UHPFRC structures without transversal reinforcement and to propose recommendations and design models adapted for practitioners. Several experimental studies on structural elements, i.e. beams and slabs, were undertaken for this purpose. Firstly, an original experimental campaign was performed on pre-tensioned members in HPFRC. A total number of six shear-critical beams of a 3.6 m span each, and two full scale beams of a 12 m span each, were tested in order to evaluate the shear and flexural strength. The principal parameter between the specimens was the fibres (...).
Book Synopsis Fibre Reinforced Cementitious Composites, Second Edition by : Arnon Bentur
Download or read book Fibre Reinforced Cementitious Composites, Second Edition written by Arnon Bentur and published by CRC Press. This book was released on 2006-11-22 with total page 625 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced cementitious composites can be designed to have outstanding combinations of strength (five to ten times that of conventional concrete) and energy absorption capacity (up to 1000 times that of plain concrete). This second edition brings together in one volume the latest research developments in this rapidly expanding area. The book is split into two parts. The first part is concerned with the mechanics of fibre reinforced brittle matrices and the implications for cementitious systems. In the second part the authors describe the various types of fibre-cement composites, discussing production processes, mechanical and physical properties, durability and applications. Two new chapters have been added, covering fibre specification and structural applications. Fibre Reinforced Cementitious Composites will be of great interest to practitioners involved in modern concrete technology and will also be of use to academics, researchers and graduate students.
Book Synopsis Experimental and Theoretical Investigation on the Shear Behaviour of High Strength Reinforced Concrete Beams Using Digital Image Correlation by : Touhami Tahenni
Download or read book Experimental and Theoretical Investigation on the Shear Behaviour of High Strength Reinforced Concrete Beams Using Digital Image Correlation written by Touhami Tahenni and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this chapter an experimental investigation is carried out on high strength concrete beams without transverse reinforcement and with transverse reinforcement. The beams were tested in bending under two concentrated loads using the technique of digital image correlation. In the test setup, the shear zone which is defined by the area of beam between the support point and the loading point was studied by the camera of high resolution. The Gom-Aramis software was used to record and analyse the numerical images by determination of the deformation of concrete in the compressed zone of the beam, to calculate the opening, the spacing and the length of the diagonal cracks. The experimental shear strength of the beams was compared with the theoretical values predicted by the different design codes, such as the American ACI 318, the British Standard BS 8110, the European Eurocode 2, the New Zealand NZS 3101 and the Indian Standard IS456. The results show that all the design codes underestimate the contribution of high strength concrete to the shear resistance of reinforced concrete beams, and greatly overestimate the contribution of transverse reinforcement. The European Eurocode 2 is the only one among the four code models that gives the best prediction of the ultimate shear strength of high strength concrete.
Book Synopsis Behavior of High Performance Steel as Shear Reinforcement for Concrete Beams by : Matthew Scott Sumpter
Download or read book Behavior of High Performance Steel as Shear Reinforcement for Concrete Beams written by Matthew Scott Sumpter and published by . This book was released on 2007 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: reinforced concrete beams, shear, high performance steel, MMFX, high strength, crack width.
Book Synopsis Shear Behavior of Concrete Beams Reinforced with High Performance Steel Shear Reinforcement by :
Download or read book Shear Behavior of Concrete Beams Reinforced with High Performance Steel Shear Reinforcement written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The current shear design provisions of the ACI 318 specifications limit the yield strength in transverse reinforcement to 60 ksi. Advancement in technology has led to the fabrication of High Performance steel. Use of HP steel in reinforced concrete could lead to cost savings by reducing the amount of steel required due to the inherited high strength and increase of the service life of structural members due to its enhanced corrosion resistance. This research is undertaken to examine the use of high performance steel as a feasible reinforcement material for reinforced concrete structures. Commercially available steel, Micro-Composite Multi-Structural Formable (MMFX), conforming to ASTM A 1035, was selected for this study. MMFX steel has minimum yield strength of 100 ksi. This experimental program comprised eighteen tests using nine large-scale reinforced concrete beams subjected to static loading up to failure. The key parameters considered in experimental program were the steel type and the amount of shear reinforcement. This research investigated crack width, modes of failure, deflection, stirrup strain, ultimate load carrying capacity and the behavior of the MMFX steel as transverse reinforcement for concrete beams. Results from the experimental program show that by utilizing the higher yield strength and consequently reducing the reinforcement ratio of MMFX steel, the beams can achieve almost the same load-carrying capacity as the beams reinforced with conventional Grade 60 steel. Also, beams reinforced with MMFX showed similar deflections at service load as the beams reinforced with Grade 60 steel. Therefore, reduction in the reinforcement ratio of MMFX steel, did not affect the serviceability of these beams. Analysis shows that the ACI 318, CSA, and AASHTO LRFD design codes can closely predict the ultimate shear strength for beams reinforced with high performance steel having yield strength up to 100 ksi. The beams were also analyzed using a well-established Mo.
Book Synopsis Behavior and Strength in Shear of Reinforced Concrete Beams and Frames Without Web Reinforcement by : Roger Diaz de Cossio
Download or read book Behavior and Strength in Shear of Reinforced Concrete Beams and Frames Without Web Reinforcement written by Roger Diaz de Cossio and published by . This book was released on 1959 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Shear for Steel Fibre Reinforcement Concrete Beam with Ratio 0.10%, 0.30%, 0.50%, 0.70% and 0.90% by : Mohd Arif Mohd Rusli
Download or read book Study of Shear for Steel Fibre Reinforcement Concrete Beam with Ratio 0.10%, 0.30%, 0.50%, 0.70% and 0.90% written by Mohd Arif Mohd Rusli and published by . This book was released on 2010 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nowadays, civil structure still faces with the same problem of uncontrolled flexural strength that can make cracks occured on the beam surface and can reach to the reinforcement bar. How to come this problem is by adding some additive materials like steel fibres. Steel Fibre Reinforced Concrete (SFRC) can be produced by adding some amount of fibre in the concrete mix. The function of SRFC is to overcome the problem of the concrete that has the weakness about the strength. The SFRC will be function to improve or increase the strength of the concrete due to the increase of the loading. Steel Fibre Reinforced Concrete (SFRC) materials are very attractive for use in civil engineering applications due to their high strength-to-weight and stiffness-to-weight ratios, corrosion resistance, light weight and potentially high durability. For this study, the variable is the percentage of steel fibre. The percentage of steel fibre is 0.10%, 0.30%, 0.50%, 0.70% and 0.90%. All of this percentage is calculated in terms of volume. The objectives of this study are to find the significant of shear due to a variation of steel fibre ratios in beam design, to find out the value of compressive and bending stress of the samples and to compare and choose the optimum percentage of steel fibre contents in concrete structure respect to its shear strength. Concrete compression test and flexural test was conducted. The graphs used to present the results. Higher percent of steel fibre will give the higher value of shear, compressive and flexural.
Book Synopsis Shear Behaviour of Macro-synthetic Fibre-reinforced Concrete Beams GFRP Reinforcement by : Yahia Ali Alam Ebrahim
Download or read book Shear Behaviour of Macro-synthetic Fibre-reinforced Concrete Beams GFRP Reinforcement written by Yahia Ali Alam Ebrahim and published by . This book was released on 2013 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
