Static And Dynamic Tests Of Buried Unreinforced Concrete Arches
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Static And Dynamic Tests Of Buried Unreinforced Concrete Arches
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Author : William J. Flathau
language : en
Publisher:
Release Date : 1966
Static And Dynamic Tests Of Buried Unreinforced Concrete Arches written by William J. Flathau and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with Concrete arches categories.
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.
Static And Dynamic Laboratory Tests Of Unreinforced Concrete Fixed End Arches Buried In Dry Sand
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Author : George D. Meyer
language : en
Publisher:
Release Date : 1967
Static And Dynamic Laboratory Tests Of Unreinforced Concrete Fixed End Arches Buried In Dry Sand written by George D. Meyer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Concrete arches categories.
Similitude Study Of Flexible Buried Arches Subjected To Blast Loads
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Author : Jimmy P. Balsara
language : en
Publisher:
Release Date : 1968
Similitude Study Of Flexible Buried Arches Subjected To Blast Loads written by Jimmy P. Balsara and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Aluminum categories.
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).
Static Tests Of Shallow Buried Reinforced Concrete Arches
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Author : Frank D. Dallriva
language : en
Publisher:
Release Date : 1988
Static Tests Of Shallow Buried Reinforced Concrete Arches written by Frank D. Dallriva and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Concrete arches categories.
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).
Comparison Of Simulation And Field Tests Of A Buried Concrete Arch Structure
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Author : Thomas Edward Kennedy
language : en
Publisher:
Release Date : 1968
Comparison Of Simulation And Field Tests Of A Buried Concrete Arch Structure written by Thomas Edward Kennedy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Blast effect categories.
Failure Of Footing Supported Buried Steel Arches Loaded Statically
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Author : John F. Munn
language : en
Publisher:
Release Date : 1970
Failure Of Footing Supported Buried Steel Arches Loaded Statically written by John F. Munn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Concrete footings categories.
Technical Abstract Bulletin
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Author :
language : en
Publisher:
Release Date :
Technical Abstract Bulletin written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with Science categories.
Predicting Blast Induced Body Motions Of A Buried Structure With Footings
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Author : Jay R. Allgood
language : en
Publisher:
Release Date : 1967
Predicting Blast Induced Body Motions Of A Buried Structure With Footings written by Jay R. Allgood and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with categories.
An approximate theory is presented for predicting the absolute and relative body deflections of shallow-buried shelters in order to provide the designer with a rational approach for selecting footing dimensions. The theory consists of two coupled parts, one that describes the motion of the free field and another that defines the motion of a model of the structure, its foundation, and the covering soil. The soil characteristics are represented by straight-line approximations to the loading and unloading portions of the stress-strain diagram from a one-dimensional compression test. Incremental strains are integrated as the stress wave propagates downward to obtain the absolute free-field displacement at the elevation of the footings. Motion of the structure is represented by a single-degree-of-freedom analog. Empirical functions are used to represent footing reaction and arching in the model of the structure. These functions are incorporated in the differential equation of motion, which is solved with the aid of a digital computer. The results are compared with available test data; velocities and deflections agree reasonably well but the magnitude of the peak accelerations from the theory are larger than the corresponding measurements. Computations performed with the computer code indicate that surface loads above about 100 psi cannot be resisted if the maximum relative deflection between the footing and the floor slab is limited to 2 inches. (Author).
Proceedings
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Author :
language : en
Publisher:
Release Date : 1966
Proceedings written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with Aerodynamics categories.
The conference presented a cross section of the many significant scientific and engineering programs carried out by the Department of the Army and provided an opportunity for Department of the Army civilian and military scientists and engineers to present the results of their research and development efforts before a distinguished and critical audience.
The Shock And Vibration Bulletin
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Author :
language : en
Publisher:
Release Date : 1987
The Shock And Vibration Bulletin written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Shock (Mechanics) categories.