Bond Strength Of Steel Fiber Reinforced Concrete Under Cyclical Loads
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Bond Strength Of Steel Fiber Reinforced Concrete Under Cyclical Loads
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Author : Kurt Paul Katsumata
language : en
Publisher:
Release Date : 1983
Bond Strength Of Steel Fiber Reinforced Concrete Under Cyclical Loads written by Kurt Paul Katsumata and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with categories.
Ultimate Strength Of Fiber Reinforced Concrete Under Cyclic Flexural Loading
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Author : Edward F. O'Neil
language : en
Publisher:
Release Date : 1978
Ultimate Strength Of Fiber Reinforced Concrete Under Cyclic Flexural Loading written by Edward F. O'Neil and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Concrete beams categories.
Cyclic flexural fatigue tests were conducted on 6- by 6- by 36-in. fiber-reinforced concrete beams containing 0.5-in. and 1.0-in. steel fibers to determine the change in ultimate flexural strength under fatigue loading. The beams were cycled at 3 Hz until failure occurred or 2 million cycles of load terminated the tests. The beams with 0.5-in. fibers produced a smaller change (45.22 percent) in ultimate flexural strength than the beams containing 1.0-in. fibers (49.68 percent). The method of failure of the beams was by a gradual breakage of the bond between the steel and paste after the development of a crack in the concrete matrix, resulting in pullout of the fibers from the matrix. (Author).
High Performance Fiber Reinforced Cement Composites 2
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Author : A.E. Naaman
language : en
Publisher: CRC Press
Release Date : 1996-06-20
High Performance Fiber Reinforced Cement Composites 2 written by A.E. Naaman and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-06-20 with Architecture categories.
The leading international authorities bring together in this contributed volume the latest research and current thinking on advanced fiber reinforced cement composites. Under rigorous editorial control, 13 chapters map out the key properties and behaviour of these materials, which promise to extend their applications into many more areas in the coming years.
Effect Of Fiber Reinforcement On Bond Strength Of Lap Splices In Normal And High Strength Concrete Under Cyclic Seismic Loading
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Author : Omar Samir Gharzuddine
language : en
Publisher:
Release Date : 2005
Effect Of Fiber Reinforcement On Bond Strength Of Lap Splices In Normal And High Strength Concrete Under Cyclic Seismic Loading written by Omar Samir Gharzuddine and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
With the more frequent use of FRC in earthquake resistant structures as a means for improving energy absorption and dissipation capacity, understanding the infl uence of steel fiber reinforcement on the bond strength between steel bars and c oncrete becomes of particular interest. While several experimental and analytical studies have concentrated on the bond characteristics under static load conditions, data on the bond stress characteri stics of steel bars in plain concrete or concrete applied with steel fiber reinf orcement is still very limited, particularly when the mode of bond failure is by splitting. This shortage of data makes it difficult at present to establish gen eral recommendations for computing the minimum volume of steel-fiber reinforceme nt needed to improve the seismic performance of reinforced beams, taking into ac count the bond parameters of the beam spliced reinforcement and the distribution of this reinforcement in the section. Experimentally investigating the bond cha racteristics of reinforcing steel bars embedded in FRC under seismic loading for better understanding of the mechanism by which fiber reinforcement improves the bond strength and seismic performance of spliced bars in tension constitutes th e primary objective of this proposed investigation. Also based on the results of this investigation, the main parameters that influence the response will be eva luated and discussed, and existing models for predicting the bond strength will be further validated or refined. To meet the objectives, 12 full-scale normal and high strength concrete beam spe cimens were tested. Each beam was designed with bar splices (20db) placed in a c onstant moment region at midspan. No transverse reinforcement will used in the s plice region. The design variables were the bar size (20 and 25 mm), ratio of co ncrete cover to bar diameter (c/db of 2.0 and 1.4), and the volume of fraction o f fibers (Vf = 0.0%, 0.5%, 1.0%, 1.5%). The test results indicated that the use of steel fibers in the splice region inc reased the ultimate load capacity, bond strength, reduced bond deterioration, im proved ductility, increased energy absorption capacity and also verified in part the equation proposed by Harajli and Mabsout2000 that accounts for the increase in bond strength of beams due to the presence of fibers.
High Performance Fiber Reinforced Cement Composites 2
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Author : A.E. Naaman
language : en
Publisher: CRC Press
Release Date : 2004-03-01
High Performance Fiber Reinforced Cement Composites 2 written by A.E. Naaman and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-03-01 with Architecture categories.
The leading international authorities bring together in this contributed volume the latest research and current thinking on advanced fiber reinforced cement composites. Under rigorous editorial control, 13 chapters map out the key properties and behaviour of these materials, which promise to extend their applications into many more areas in the com
Bond Of Reinforcement In Concrete
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Author : fib Fédération internationale du béton
language : en
Publisher: fib Fédération internationale du béton
Release Date : 2000-01-01
Bond Of Reinforcement In Concrete written by fib Fédération internationale du béton and has been published by fib Fédération internationale du béton this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-01-01 with Technology & Engineering categories.
"In 1993, the CEB Commission 2 Material and Behavior Modelling established the Task Group 2.5 Bond Models. It's terms of reference were ... to write a state-of-art report concerning bond of reinforcement in concrete and later recommend how the knowledge could be applied in practice (Model Code like text proposal)... {This work} covers the first part ... the state-of-art report."--Pref.
Bond In Concrete
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Author : Peter Bartos
language : en
Publisher:
Release Date : 1982
Bond In Concrete written by Peter Bartos and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Adhesives categories.
Behavior Modeling And Impact Of Bond In Steel Reinforced High Performance Fiber Reinforced Cement Based Composites
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Author : Matthew J. Bandelt
language : en
Publisher:
Release Date : 2015
Behavior Modeling And Impact Of Bond In Steel Reinforced High Performance Fiber Reinforced Cement Based Composites written by Matthew J. Bandelt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
High-performance fiber-reinforced cement-based composites (HPFRCCs) are a class of cement-based materials that exhibit a psuedo strain-hardening behavior in uniaxial tension after first cracking, and retain residual strength in compression after crushing. The unique mechanical properties of HPFRCCs have led researchers to investigate their use in structural applications where damage tolerance and energy dissipation is needed. Research on structural applications of steel reinforced HPFRCCs members has shown enhanced damage tolerance, shear capacity, flexural strength, inelastic deformation capacity, and life cycle performance. Recent research has focused on the interaction between mild steel reinforcement and HPFRCCs for modeling and design purposes. When reinforced HPFRCCs have been subjected to direct tension, early strain hardening and reinforcement strain localization have been observed caused by short debonded lengths, as opposed to long debonded lengths in traditional reinforced concrete. Short debonded lengths caused the HPFRCC reinforcement to fracture at lower levels of specimen deformation compared to reinforced concrete. This recent research indicates that bond strength between reinforcement and HPFRCCs may be higher than that of traditional reinforced concrete. Additionally, reinforcement tensile strains may be an important consideration for design and modeling of reinforced HPFRCC structural components. In this dissertation, the bond behavior between steel reinforcement and HPFRCCs is presented through experimental testing and numerical simulations. Bond experiments were conducted under monotonic and cyclic loading conditions where the HPFRCC material surrounding the reinforcement was in a flexural tension stress state. Monotonic test results show that bond strengths are 37% higher, on average, in reinforced HPFRCCs than in reinforced concrete. Additionally, bond-slip toughness (i.e., the area under the bond stress versus reinforcement slip curve) is higher in reinforced HPFRCCs than in reinforced concrete. Cyclic bond-slip experiments were performed for two types of HPFRCCs and compared to monotonic behavior using beam-end specimens. Results show that bond deterioration occurs in HPFRCCs after the maximum bond stress is reached, causing bond stress to reduce by 60%, on average. The loss of bond capacity and bond-slip toughness is due to combined crushing and splitting of the interface. The effects of bond on structural performance are examined through a study on monotonic and cyclic performance of reinforced HPFRCC beam specimens with varying reinforcement ratios. It is shown that cyclic deformation histories can decrease deformation capacity by up to 67%. Unlike traditional reinforced concrete, deformation capacity of reinforced HPFRCCs is shown to increase with increasing longitudinal reinforcement ratio. Results show that the difference between monotonic and cyclic deformation capacity becomes smaller as reinforcement ratio increases. Suggestions are made for providing a moderate amount of reinforcement to take full of advantage of the HPFRCC material toughness and improve structural performance and deformation capacity. An interface bond-slip material model is proposed based on the experimental results to model the interaction between steel reinforcement and HPFRCC materials. Simulations with the proposed interface model are compared with perfect bond models in finite element simulations by comparing numerical and experimental responses of reinforced HPFRCC structural members. Simulations are conducted on reinforced HPFRCC components under monotonic and cyclic deformation histories, and on members with varying reinforcement ratios. Including the proposed interface material model reduces variability in simulated deformation capacity, and leads to a consistent response in terms of cracking patterns and deformation capacity. A methodology is proposed to predict reinforced HPFRCC deformation capacity by examining reinforcement strains, modeling the interface conditions, and implementing a cyclic fracture energy material parameter from test data. The dissertation concludes with suggestions for future research that can extend the work presented herein. Suggestions for future work include additional experimental, numerical, and design-related research.
Ductility Of Steel Fiber Reinforced Concrete Connections Under Cyclic Loading
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Author : Masoud Majd
language : en
Publisher:
Release Date : 1978
Ductility Of Steel Fiber Reinforced Concrete Connections Under Cyclic Loading written by Masoud Majd and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with categories.
Durability Of Strain Hardening Fibre Reinforced Cement Based Composites Shcc
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Author : G.P.A.G. Van Zijl
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-12-06
Durability Of Strain Hardening Fibre Reinforced Cement Based Composites Shcc written by G.P.A.G. Van Zijl 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 2010-12-06 with Technology & Engineering categories.
Strain-Hardening Fibre-Reinforced Cement-Based Composites (SHCC) were named after their ability to resist increased tensile force after crack formation, over a significant tensile deformation range. The increased resistance is achieved through effective crack bridging by fibres, across multiple cracks of widths in the micro-range. Whether these small crack widths are maintained under sustained, cyclic or other load paths, and whether the crack width limitation translates into durability through retardation of ingress of moisture, gas and other deleterious matter, are scrutinized in this book by evaluation of test results from several laboratories internationally. The durability of SHCC under mechanical, chemical, thermal and combined actions is considered, both for the composite and the fibre types typically used in SHCC. The compilation of this state-of-the-art report has been an activity of the RILEM TC 208-HFC, Subcommittee 2: Durability, during the committee life 2005-2009.