Download or read book Tests and Ultimate Load Analysis of Deep Beams of Reinforced Concrete written by Robert Breton and published by . This book was released on 1955 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Review of the Literature Pertaining to the Analysis of Deep Beams written by Gayle E. Albritton and published by . This book was released on 1965 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Similitude Study of Reinforced Concrete Deep Beams written by Jimmy P. Balsara and published by . This book was released on 1971 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were performed on deep beams under a midspan load to determine the scaling of cracking and ultimate load-carrying capacities of beams failing in shear. Two types of scaling procedures were used, one in which only the geometries are scaled (replica of mach models), the other in which both geometry and material properties are scaled (dissimilar-strength or environmental models). The results of twenty simply supported beams tested statically with span-to-depth ratios of 4.67, 3.88, 2.80, and 2.00 and comprising 1/4- and 1/2-scale models and laboratory prototypes are presented. Two prototype beams with L/d ratios of 4.67 and 3.88 were tested dynamically to provide some correlation between statically and dynamically loaded beams. Test results indicate that cracking loads can be adequately predicted from both replica and dissimilar-strength models and ultimate loads can be predicted from replica models for all span-to-depth ratios tested. When transition from beam to arch action occurs, the dissimilar-strength models underpredict the ultimate load-carrying capacity of the prototypes. (Author).

Download or read book Static Tests of Reinforced concrete Deep Beams written by Gayle E. Albritton and published by . This book was released on 1965 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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

Download or read book Static and Dynamic Shear Behavior of Uniformly Loaded Reinforced Concrete Deep Beams written by Robert A. Crist and published by . This book was released on 1971 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Behavioral equations were developed for reinforced concrete deep beams, especially in the realm of shear capacity. A series of static and dynamic beam tests was performed to aid in the development of this objective. Static shear behavior equations for deep beams were derived on the lower boundary of reinforced concrete deep beam data represented by research from this report and other research comprising 73 tests. Equations for a total static shear capacity are given which conservatively predict shear capacities of the beam tests considered. (Author).

Download or read book An Experimental Study of Model Deep Beams written by Peter A. Hampe and published by . This book was released on 1968 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study was conducted to determine to what extent strength properties of materials used in environmental (strength) modeling of reinforced concrete deep beams need to be scaled. The first phase of this study was conducted to determine the effect that concrete strength has on shear and flexural failures of model reinforced concrete deep beams, and the second phase was conducted to determine if the tensile and compressive reinforcements in the beams can be scaled using bars of intermediate-grade steel. This was accomplished by comparing the response of two beams, one reinforced with intermediate-grade steel, and the other with an alloy of magnesium, so that the ratio of forces developed at yield in the two different reinforcements was near unity. Results of tests of ten simply supported, doubly reinforced concrete deep beams subjected to a concentrated static load are presented herein. Four beams had a clear-span-to-effective-depth ratio, i.e. L/d, of 2.00, and six beams had an L/d of 4.67. Two L/d = 4.67 beams were used to compare the response of a beam reinforced with steel with one that was reinforced with magnesium-lithium bars. Test results indicated that concrete strength has considerable effect on ultimate load and mode of failure of L/d = 2.00 beams, but has less effect on ultimate load and no effect on mode of failure of L/d = 4.67 beams. The comparison study of beams with different reinforcing materials indicated that tensile and compressive forces in reinforcements can be scaled properly using either steel or magnesium-lithium bars, although length and stress scales of the steel bars must be distorted. (Author).

Download or read book Behavior of Reinforced Concrete Deep Beams Under Static and Dynamic Loading written by Fred W. Beaufait and published by . This book was released on 1967 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Static Tests of Reinforced Concrete Beams written by H. G. Geymayer and published by . This book was released on 1968 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Ultimate Load Design of Continuous Concrete Beams written by Derrick Beckett and published by . This book was released on 1968 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of Reinforced Concrete Beams Subjected to Fire written by Bruce R. Ellingwood and published by . This book was released on 1976 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods for analytically predicting the behavior of simply supported reinforced concrete beams subjected to fire are presented. This is generally a two-step process involving a thermal analysis followed by a stress analysis. This study emphasizes the latter, wherein the determination of moment-curvature-time relationships for the beam cross section incorporates the temperature-dependent strength degradation in the steel and concrete as well as thermal and creep strains. The sensitivity of the predictions to various phases of analytical modeling is investigated to establish the parameters most important for the prediction of beam behavior and to indicate where additional data should be gathered. A comparison of predicted behavior with that observed in fire tests shows excellent agreement when realistic reinforcement temperature histories are used.

Download or read book Structural Behaviour of Conventional and FRP Reinforced Concrete Deep Beams written by Fawzi Latosh and published by . This book was released on 2014 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many structural applications such as pile caps, girders, foundation walls and offshore structures include the use of reinforced concrete deep beams as structural elements. The structural behaviour of deep beams is affected by its span to depth ratio, type of loading, reinforcement ratio in vertical and horizontal directions, concrete strength, and type of cross section. Since the traditional beam theory is not applicable for designing deep beams, the strut and tie model (STM) was developed earlier as a rational method for estimating the capacity of a reinforced concrete deep beam and accepted in the current codes and standards for the design of such beams. While for designing a conventional (i.e. steel reinforced) concrete deep beams STM has been available in different codes and standards, for FRP-reinforced concrete deep beams such provisions are not available in most codes and standards. Only in the recent edition of the relevant Canadian standard (i.e., CAN/CSA S-806-12) which came out much later than the commencement of the present research, an STM approach has been provided, which is primarily based on that of conventional deep beams with some adjustments by using FRP reinforcement’s properties to calculate the tie capacity. One of the reasons for the lack of standards or code provisions for such systems in other codes (e.g., ACI and Eurocode) is perhaps the lack of adequate experimental data available on the performance of such beams. As the use of FRP reinforced concrete structures is increasing, there is a need to the development of a design method for FRP-reinforced concrete deep beams, which could be similar to the existing STM method available for the conventional deep beams, similar to the approach taken by the Canadian standard. But, such provisions must be validated and/or modified appropriately and calibrated with experimental studies. The objectives of the present research are to: (1) Identify the critical parameters governing the behaviour of conventional concrete deep beams; (2) Develop a design procedure for FRP reinforced concrete deep beams; (3) Study the critical factors in FRP-reinforced concrete deep beams and evaluate the proposed design procedure using numerical and experimental tests; and (4) Evaluate the STM procedure outlined in the CSA-S806-12[2012] for designing FRP reinforced deep beams. The current design provisions for conventional concrete deep beams as provided in the following three prominent standards that use the strut–and-tie model have been extensively reviewed: ACI 318-08, Eurocode EN 1992-1-1-2004(E) and Canadian code CSA A23-3-04. The influence of different variables on the ultimate strength of deep beam estimated using STM provisions in the codes are studied. A large database of available experimental studies on conventional deep beams has been created. The ultimate load capacity and failure pattern for each sample in the database have been evaluated using the STM models provided in the above three standards, and compared with the experimental results and critical parameters that have been identified. The results of the preliminary study show that the use of Strut and Tie model are generally appropriate method for beams with shear-span to depth ratio less than or equal to two. Also the study confirmed that both the shear span-to-depth ratio and the amount of shear web reinforcement have the most significant effect on the behaviour of deep beams and on the codes predictions of the ultimate strength of deep beams. Based on the review of the STM models available for the conventional deep beams as provided in the current standards, a similar model has been developed here to design FRP-reinforced deep beams. Using the proposed method, a set of FRP-reinforced deep beam has been designed and constructed. An experimental program has been carried out to test these beams to study the applicability of the proposed method and effect of the critical design parameters. Nine FRP reinforced concrete deep beams were divided into three groups, based on their shear span-to-depth ratio (a/d), and tested under a single concentrated load to investigate their behaviour and strength. The test variables were the shear span-to-depth ratio and the quantity of web shear reinforcement. The behaviour of deep beams is indicated by their shear strength capacity, mid span deflection, strain at the FRP longitudinal and web reinforcement, crack propagation, and type of failure. A new equation is presented in this study to calculate the contribution of the FRP web reinforcement to the ultimate shear capacity of FRP-reinforced concrete deep beams. As a new version of the CSA standard is available now which provides STM procedure for FRP-reinforced deep beams, the test results have been compared to predictions based on the current CSA design procedure. This investigation reveals that the Strut and Tie model procedure in the CSA-S806-12 code provides a conservative and convenient design procedure for FRP-reinforced concrete deep beams. However, there are some areas where the code provisions can be improved and some inconsistencies in the way the strut capacity is determined can be removed. In addition, the shear design procedures of the ACI 440.1R-06 Code and of the modified Strut and Tie model (STM) from Appendix A of the ACI 318-08 Code were compared based on their test results and a modified STM procedure based on ACI 318-08 provision has been proposed for the adoption to ACI 440. This investigation reveals that adopting the procedure in the ACI 318-08 Code and taking into consideration the properties of FRP reinforcement provides a conservative and rational design procedure for FRP reinforced concrete deep beams.

Download or read book Concrete Beams with Openings written by M. A. Mansur and published by CRC Press. This book was released on 1999-01-29 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book compiles state-of-the-art information on the behavior, analysis, and design of concrete beams containing transverse openings. Discussions include the need, effects, and classification of openings as well as the general requirements for fulfilling design pure bending, combined bending, and shear - illustrated with numerical examples torsion alone or in combination with bending and shear large rectangular openings as well as opening size and location on beam behavior methods for analyzing ultimate strength and serviceability requirements effects of torsion in beams large openings in continuous beams and their effects on possible redistribution of internal forces as well as guidelines and procedures for the design of such beams effect of prestressing on the serviceability and strength of beams with web openings design against cracking at openings and ultimate loads Concrete Beams with Openings serves as an invaluable source of information for designers and practicing engineers, especially useful since little or no provision or guidelines are currently available in most building codes.

Download or read book A Study of Shear Behavior of Reinforced Concrete Deep Beams written by Phu Trong Nguyen and published by . This book was released on 2013 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reinforced concrete deep beams are vital structural members serving as load transferring elements. The behavior of reinforced concrete deep beams is complex. Nonlinear distribution of strain and stress must be considered. Prior to 1999, ACI 318 Codes included an empirical design equation for reinforced concrete deep beams. Since 2002, the strut and tie model and nonlinear analysis have been required. However, both methods have disadvantages of complexity or lack of transparency. The objective of this study is to produce a simple, reliable design equation for reinforced concrete deep beams. A nonlinear finite element program, ATENA, was used for analyzing and predicting the behavior of concrete and reinforced concrete structures. First, applicability of ATENA was verified by developing the computer models of simply supported and two span continuous deep beams based on Birrcher's tests of simply supported deep beams. Tests by Rogowsky and Macgregor and by Ashour are the basis for the models of continuous two span deep beams. Those tests were selected because the researchers reported adequate details of the experimental program and on specimen behavior. Then a series of simply supported and two span continuous deep beam models were developed based on the details and geometry of Birrcher's beams. The computer models were used to investigate the following parameters: the compressive strength of concrete, shear span to depth ratios, longitudinal reinforcement ratios, web reinforcement, effect of member depth, and loading conditions. Finally, a proposed design equation for shear strength of reinforced concrete deep beams was derived based on the observed the behavior of reinforced concrete deep beam tests, the results of the analytical study, and a plastic truss model. The proposed equations were in good agreement with test values and provide an alternate approach to current design procedures for deep beams.

Download or read book Tests of Reinforced Concrete Deep Beams written by James Grierson MacGregor and published by . This book was released on 1983 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Statistical Analysis of the Ultimate Strength of Reinforced Concrete Beams Without Web Reinforcement written by Theodore Carl Zsutty and published by . This book was released on 1961 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Investigation of Deep Reinforced Concrete Beams Under Static and Dynamic Loading Vol Ii Strength and Behavior in Shear written by H. A. R. DE PAIVA and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thirty-five beams were tested, 13 statically and 22 dynamically, to determine their strength and behavior in shear; to determine if failure under a dynamic load was different from that under a static load; and to evaluate the effectiveness of web reinforcement in moderately deep beams. All beams tested, both statically and dynamically, exhibited arch action prior to failure. Three types of failures are described for both tests: flexure, shear, and flexure-shear. Web reinforcement in the beams tested both ways contributed little toward an increase in strength or a change in behavior and mode of failure, except for generally reducing the ultimate deflections. The static strength at flexural yielding in these moderately deep beams could be predicted reasonably well by the conventional straight line theory. The ultimate static flexural strength could be predicted by the standard ultimate strength procedure provided an increased value of the limiting concrete strain equal to 0.008 is used at failure. (Author).