Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Static Loading Of Small Buried Arches
Download Static Loading Of Small Buried Arches full books in PDF, epub, and Kindle. Read online Static Loading Of Small Buried Arches ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Static Loading of Small Buried Arches by : H. L. Gill
Download or read book Static Loading of Small Buried Arches written by H. L. Gill and published by . This book was released on 1964 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Static and dynamic tests have been performed to study the behavior of small buried arches. The objective was to gain information which will serve as a guide in developing design methods for underground structures. This report describes the static tests, the prime purposes of which were: (1) to obtain information on the behavior of a statically loaded soil-arch system, and (2) to provide data for comparison with that from a similar system subjected to blast loading. The test configuration consisted of two conterminous semicircular arches each 30 inches in diameter buried in dry sand with 6 inches of cover over the crown. The arches were identical except for differing footing widths. The entire system was contained by the NCEL atomic blast simulator pit, which is 9 feet by 10 feet in plan and 12 feet deep. Static loads up to 25 psi were applied to the surface of the sand as various measurements were being made. The test results show that the expected decrease in footing deflection with increase in footing width was accompanied by an increase of maximum moment in the arch. (Author).
Author :United States. Naval Civil Engineering Laboratory, Port Hueneme, California Publisher : ISBN 13 : Total Pages :0 pages Book Rating :4.:/5 (932 download)
Book Synopsis Static Loading of Small Buried Arches by : United States. Naval Civil Engineering Laboratory, Port Hueneme, California
Download or read book Static Loading of Small Buried Arches written by United States. Naval Civil Engineering Laboratory, Port Hueneme, California and published by . This book was released on 1964 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Blast Loading of Small Buried Arches by : Jay R. Allgood
Download or read book Blast Loading of Small Buried Arches written by Jay R. Allgood and published by . This book was released on 1963 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: It was evident that the passive pressures which developed on the sides played the dominant role in providing resistance. It has been found that in static tests some of the surface load is carried by arching through the soil. In the dynamic tests the inertial forces of the soil above the arch were found to be important. The inertial load overcame the soil shear resistance so that a load approximately equal to the surface load acted on the structure. A model analysis of the system and subsequent comparison of the deflections from the small-structure tests and the Operation Plumbbob Structure 3.3 tests indicate that modeling of deflections is possible.
Book Synopsis Static and Blast Loading of Small Buried Cylinders by : Jay R. Allgood
Download or read book Static and Blast Loading of Small Buried Cylinders written by Jay R. Allgood and published by . This book was released on 1964 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research was performed to obtain information on the behavior of shallow-buried cylinders subjected to static and blast loads in support of the task objective of gaining knowledge to provide guidelines for developing design methods for underground protective structures. It was especially desired to obtain data on the time and space variations of deflection, thrust, and moment under the two types of loading for purposes of making a comparison. The results show that the net arching across a flexible shallow-buried cylinder is small and that the maximum moment occurs at the bottom of the cylinder. Differences in response to static and blast loading are relatively small except for the crown, which deflects about twice as much under blast loading as under corresponding static loading. An analogy with the simple spring-mass system is drawn to explain this behavior. Information obtained on the influence of placing a low- strength isolating material in the soil over a cylinder indicates that such an expedient is of questionable benefit.
Book Synopsis Static Tests of Shallow-buried Reinforced Concrete Arches by : Frank D. Dallriva
Download or read book Static Tests of Shallow-buried Reinforced Concrete Arches written by Frank D. Dallriva and published by . This book was released on 1988 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: The determination of the loads on and behavior of shallow-buried arch structures is complicated by the geometry of the arch and by existence if soil structures arches interaction effects. A common approach to the analysis of buried is to idealize the structure as a lumped parameter single degree of freedom (SDOF) system. The parameters which must be assumed for input into the SDOF model include a loading function and a structural resistance deflection relationship. The applied load on a buried arch due to overpressure at the ground surface includes a radial and a tangential component. The radial component can be measured experimentally; however, there seems to be no available transducers to measure the tangential component or interface friction. Two 1/12-scale model reinforced concrete arches were tested statically in a sand backfill. The arches were semicircular with an inside radius of 1 foot 9 inches and a thickness of 2 inches. One arch was covered with two layers of 1/32-inch-thick Teflon at the soil-structure interface to significantly reduce the interface friction, and the loading and behavior of the two arches were compared. Pretest finite element calculations were conducted to estimate the arch behavior. Based on both the experimental data and posttest calculations, it appears that interface friction on a shallow buried arch has an effect on its behavior, at least for the case of static loads. The load path at sections in the arch with a lower friction coefficient at the interface tended more toward pure compression than it did in the other arch. Keywords: Air blast simulation; Concrete structures; Hardened installation. (SDW).
Book Synopsis Static and Dynamic Tests of Buried Unreinforced Concrete Arches by : William J. Flathau
Download or read book Static and Dynamic Tests of Buried Unreinforced Concrete Arches written by William J. Flathau and published by . This book was released on 1966 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of the study was to determine the response, to collapse, of buried semicircular, unreinforced concrete fixed-end arches of varying stiffnesses when subjected to both static and dynamic loads.
Download or read book Technical Report written by and published by . This book was released on with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Buried Structures by : Dr P S Bulson
Download or read book Buried Structures written by Dr P S Bulson and published by CRC Press. This book was released on 1984-12-20 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Much of the infrastructure of modern society is buried below ground. Pipeline, conduits and culverts carry the services on which our economies depend and the strength and resilience of such structures is of vital importance. Larger underground construction is becoming more common in cities and towns, and in defence installations. This book brings t
Book Synopsis A Model Study of Dynamically Loaded Square Footings on Dry Sand by : Jack K. Poplin
Download or read book A Model Study of Dynamically Loaded Square Footings on Dry Sand written by Jack K. Poplin and published by . This book was released on 1969 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The investigation reported herein was undertaken to develop an approach to modeling displacements of surface and shallow-buried footings on dry sand subject to high-intensity, single-pulse loads. A hypothetical shallow-bured structure with an isolated footing loaded by airblast overpressure produced by detonation of a nuclear weapon was assumed for design of load pulses on nine model footings used: footing widths of 4.5, 6.0, and 7.5 in. and depth-of-burial to footing width ratios of 0, 0.5, and 1.0. The principles of similitude were used to scale length, force, and time in the models. The models were placed in mobile test bins of uniform, fine, dry sand (90 percent relative density) and subjected to dynamic and static loading. Nondimensional load-displacement relations dependent only on depth-of-burial ratio were developed relating maximum displacement to peak dynamic load, footing width, and soil shear strength gradient. When the dynamic response of the footings in the form of reaction-displacement curves was compared with static response, an increase in initial stiffness and ultimate strength was observed for dynamic loading. However, these dynamic increases were greatest when the static shear strength was lowest, i.e. footings on the surface, and were least for footings buried at a depth equal to its width where the static overburden produced a substantial increase in shear strength. (Author).
Book Synopsis Model Study of a Buried Arch Subjected to Dynamic Loading by : Robert K. Tener
Download or read book Model Study of a Buried Arch Subjected to Dynamic Loading written by Robert K. Tener and published by . This book was released on 1964 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sidewall Friction Reduction in Static and Dynamic Small Blast Load Generator Tests by : Paul F. Hadala
Download or read book Sidewall Friction Reduction in Static and Dynamic Small Blast Load Generator Tests written by Paul F. Hadala and published by . This book was released on 1968 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flexible Liners for Underground Support by : Ernest L. Corp
Download or read book Flexible Liners for Underground Support written by Ernest L. Corp and published by . This book was released on 1967 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Response of Soils to Dynamic Loadings by : Robert V. Whitman
Download or read book The Response of Soils to Dynamic Loadings written by Robert V. Whitman and published by . This book was released on 1970 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Failure of Footing-supported Buried Steel Arches Loaded Statically by : John F. Munn
Download or read book Failure of Footing-supported Buried Steel Arches Loaded Statically written by John F. Munn and published by . This book was released on 1970 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this investigation was to study the failure of statically loaded steel circular arches buried in sand as affected by three variables; footing width, arch flexibility, and depth of burial. Static tests were performed on 16 arches with 18-inch outside diameters. The parameters varied were wall thickness, depth of burial, and footing area. The maximum static overpressure available was 100 psi. Strain measurements were made at various locations on the arch so that thrusts and moments could be computed. (The computer program developed for these computations is described in Appendix B.) Measurements of crown deflection and footing settlement were also made. Three modes of failure were observed in the various tests. Buckling of the crown of the arch and punching of the footings into the supporting soil were the two dominant failure modes, but buckling of the arch haunches also occurred in the case of the thin arch with large footings. Generally, it was observed that the thin arches with large footings exhibited arch failure while the thick arches with small footings exhibited footing failure. Based on the test results, a method was proposed for predicting the type of failure occurring for arches with various footing and arch stiffness configuration combinations. Support investigations were conducted to determine the properties of the sand and steel used in the test. Sand properties are described in Appendix A. (Author).
Book Synopsis U.S. Government Research Reports by :
Download or read book U.S. Government Research Reports written by and published by . This book was released on 1964 with total page 2180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Static and Dynamic Laboratory Tests of Unreinforced Concrete Fixed-end Arches Buried in Dry Sand by : George D. Meyer
Download or read book Static and Dynamic Laboratory Tests of Unreinforced Concrete Fixed-end Arches Buried in Dry Sand written by George D. Meyer and published by . This book was released on 1967 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Similitude Study of Flexible Buried Arches Subjected to Blast Loads by : Jimmy P. Balsara
Download or read book Similitude Study of Flexible Buried Arches Subjected to Blast Loads written by Jimmy P. Balsara and published by . This book was released on 1968 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the study was to investigate and verify model-to-prototype scaling relations for blast loaded buried arches that respond both elastically and inelastically. Four geometrically similar, semicircular aluminum alloy arches with 4-, 8-, 12-, and 36-inch diameters were buried in dense dry sand and subjected to air-blast-induced loads on the surface. The tests were conducted at the Large Blast Load Generator located at the U.S. Army Engineer Waterways Experiment Station. The results of two series of tests, each consisting of 3 repeated shots, ranging from 70 to 300 psi, are presented. Within the range of parameters investigated, the scaling of the dependent variables were adequately verified. These variables included acceleration, velocity, displacement, thrust, and bending moment. (Author).
