Download or read book The Effects of High Intensity Impulse Loading on Reinforced Concrete Beams written by J. Nelson Ingram and published by . This book was released on 1976 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of a study of the response of impulse loaded reinforced concrete beams are presented. The objectives were to develop basic data of the blast-structural response phenomenon for the evaluation of structural survivability, and to compare these data with results of digital computer program, IMPBC, a simulation of the blast-structure interaction. The study included the definition of failure and a method for assessing damage due to blast loading. The reinforced concrete beams were full-sized representations of members found in buildings. There were twelve impulse tests, of which seven were performed on identical beams for which the material properties and steel percentage were typical of average construction practice. The remaining five were of beams having high strength concrete (two tests), high strength steel (one test), and greater steel percentage (two tests). Impulse loading was obtained from the detonation of 214-pound spherical pentolite charges suspended above the beams. The high strength concrete beams exhibited the greatest resistance to damage from impulse loading. These members experienced little distress while the members with increased steel area and greater moment capacity suffered the greater damage. This was predicted by the damage criterion presented in this report.

Download or read book An Investigation of the Effects of High Intensity Impulse Loads on Simply Supported Reinforced Concrete Beams written by James Nelson Ingram and published by . This book was released on 1970 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Impulsive Loads on Fiber reinforced Concrete Beams written by James P. Romualdi and published by . This book was released on 1965 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes an investigation of the effect of a destructive impulse load upon fibre reinforced concrete beams. Concrete develops tension cracks as a result of minute flaws that are inherent in its nature. A method of arresting these cracks by placing short lengths of randomly spaced fine wire within the concrete mix is described. The results of the studies indicate that (1) the fibres increase the tensile strength of the concrete by as much as 100 percent for static loading, and (2) the material exhibits considerable post-cracking strength. These two effects increase the ability of the material to absorb energy.

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High impulse Dynamic Loading of Reinforced Concrete Beams written by Richard I. Nightingale and published by . This book was released on 1960 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Impact Loading on Prestressed and Ordinary Reinforced Concrete Beams written by Building Research Station (Great Britain) and published by . This book was released on 1961 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Impact Loading of Reinforced Concrete Beams written by Barend Constant Van Wyk and published by . This book was released on 1957 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Shock and Vibration Digest written by and published by . This book was released on 1983 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Effects of Confinement and Small Axial Load on Flexural Ductility of High Strength Reinforced Concrete Beams written by Siu-Lee Chau and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Effects of Confinement and Small Axial Load on Flexural Ductility of High-strength Reinforced Concrete Beams" by Siu-lee, Chau, 周小梨, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled EFFECTS OF CONFINEMENT AND SMALL AXIAL LOAD ON FLEXURAL DUCTILITY OF HIGH-STRENGTH REINFORCED CONCRETE BEAMS Submitted by CHAU Siu Lee for the Degree of Master of Philosophy at The University of Hong Kong in August 2005 Compared with normal-strength concrete, high-strength concrete has higher strength but is generally more brittle. Its use in a reinforced concrete structure could lead to an undesirable reduction in ductility if not properly controlled. In this thesis, the effects of confinement and small axial load on the flexural ductility of reinforced concrete beams cast of both normal- and high-strength concrete have been evaluated by analyzing the complete moment-curvature behaviour of the beam sections. The results reveal that the use of high-strength concrete would at a constant tension steel ratio increase the flexural ductility, while at a constant tension to balanced steel ratio decrease the ductility. On the other hand, provision of confinement enhances the ductility of both normal- and high-strength concrete sections at both a constant tension steel ratio and at a constant tension to balanced steel ratio. It does this in two ways. Firstly, it increases the balanced steel ratio of the section. So, for a constant steel ratio, the section with higher confinement is more under-reinforced. Secondly, it increases the residual strength and ductility of the concrete such that at the same tension to balanced steel ratio, the ductility of the section increases. From the results of the analysis, it can be concluded that providing confinement to a section is an effective way of improving the ductility of reinforced concrete beam sections, especially those cast of high-strength concrete. However, most codes of practice do not specify a suitable design method for reinforced concrete beams that takes into account the effect of confinement. Therefore, design formulas for the flexural strength and ductility design of high-strength concrete beams with the effects of confinement taken into account have been developed. On the other hand, it is proposed to compensate for the reduction in flexural ductility due to the use of high-strength concrete by adding compression and/or confining reinforcement. A simple design method that correlates the amount of addition reinforcement needed to maintain a constant level of minimum ductility and the concrete strength is developed. Conversely, the presence of compressive axial load, even at a low level, has an adverse effect on flexural ductility. As a portion of concrete is used to resist the axial load, the section becomes less under-reinforced. Therefore, the flexural ductility decreases with the level of axial load applied. From the results obtained, it is found that the presence of axial load mainly affects the degree of the section being under- or over-reinforced. Measures should therefore be taken to maintain the ductility level of sections with applied axial load at an acceptable level. The study recommends the provisions of additional compression reinforcement to resist the applied axial load, and proposes a design method for restoring the ductility of a section with applied axial load to a ductility level attained by an identical section without axial load. DOI: 10.5353/th_b3199766 Subjects:

Download or read book The Effect of Impact Loading on Prestressed and Ordinary Reinforced Concrete Beams written by and published by . This book was released on 1961 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Impulsive Loads Upon Reinforced Concrete Beams written by John J. Stewart and published by . This book was released on 1957 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shear and Bond Strength of High strength Reinforced Concrete Beams Under Impact Loads First Phase written by Richard W. Furlong and published by . This book was released on 1968 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first phase of a study into the shear and bond capacity of high-strength reinforced concrete beams under static and dynamic load is reported. A static load test program involving midspan loads on two flexure and 11 shear beams with a 6-inch by 12-inch cross section and nine anchorage bond specimens containing numbers 8, 11, or 14S bars was conducted. Duplicate flexure specimens, shear specimens, and numbers 8 and 11 bar bond specimens were subjected to dynamic loading from a falling mass that struck each beam through an impulse-controlling cushion of vermiculite concrete. The concrete strength in the test beams varied from 6000 to 9100 psi. (Author).

Download or read book The Effect of Impact Loading on Prestressed and Ordinary Reinforced Concrete Beams written by Building Research Station (Great Britain) and published by . This book was released on 1961 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Insights and Innovations in Structural Engineering Mechanics and Computation written by Alphose Zingoni and published by CRC Press. This book was released on 2016-11-25 with total page 2223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insights and Innovations in Structural Engineering, Mechanics and Computation comprises 360 papers that were presented at the Sixth International Conference on Structural Engineering, Mechanics and Computation (SEMC 2016, Cape Town, South Africa, 5-7 September 2016). The papers reflect the broad scope of the SEMC conferences, and cover a wide range of engineering structures (buildings, bridges, towers, roofs, foundations, offshore structures, tunnels, dams, vessels, vehicles and machinery) and engineering materials (steel, aluminium, concrete, masonry, timber, glass, polymers, composites, laminates, smart materials).

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976-06 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pressure impulse Diagrams Using Finite Element Analysis for Reinforced Concrete Columns Subjected to Blast Loading written by Rasekh Rahim Zadeh and published by . This book was released on 2011 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reinforced concrete is one of the prime building materials widely used to construct protective structures. One of the purposes of this project is to study the non-linear response of reinforced concrete structures when subjected to impact and blast loading. The study is conducted at two levels: material level and structural level. At the material level, the strength enhancement of three material models of LS-DYNA subjected to high strain rates is studied. The effects of strain rate and lateral inertial confinement on the strength enhancement are investigated. Recommendations are made to improve the accuracy of the results of future numerical simulations for reinforced concrete structures subjected to loads having high strain rates. At the structural level, Pressure-Impulse diagrams for reinforced concrete columns that have four configurations of transverse reinforcement are developed. Finite element modeling in LS-DYNA is used to analyze the structures and calculate the damage level for each blast event. The developed Pressure-Impulse diagrams are used to study the effect of confinement on the reduction of damage level at impulsive, dynamic, and quasi-static loading conditions.