Static And Dynamic Plate Bearing Tests On Dry Sand Without Overburden
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Static And Dynamic Plate Bearing Tests On Dry Sand Without Overburden
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Author : Charles Reed White
language : en
Publisher:
Release Date : 1964
Static And Dynamic Plate Bearing Tests On Dry Sand Without Overburden written by Charles Reed White and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with categories.
The NCEL atomic blast simulator is intended for testing beams, beam- column connections, and other relatively narrow structural elements. This report describes the successful adaptation of the simulator for providing dynamic loads on a bearing plate on sand and presents some tentative results. The dynamic bearing capacity of a 15-in.-diameter bearing plate on dry sand without overburden was 90% higher than the static bearing capacity. Also, the dynamic bearing modulus was considerably higher than the static; e.g., 226 psi per in. dynamic versus 137.7 psi per in. static at 0.5 in. plate settlement.
Static And Dynamic Plate Bearing Tests On Dry Sand With Overburden
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Author : Charles Reed White
language : en
Publisher:
Release Date : 1964
Static And Dynamic Plate Bearing Tests On Dry Sand With Overburden written by Charles Reed White and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with categories.
Six static and 53 dynamic soil-bearing tests were made under simulated overburden pressures of zero to 15 psi to determine the load-displacement characteristics of buried footings. The static bearing modulus increased as overburden pressure increased up to an overburden pressure of approximately 6 psi. The dynamic bearing modulus increased exponentially with overburden pressure to an overburden pressure of 15 psi. Up to 3 psi overburden pressure, dynamic modulus was larger than static; but the difference was less at 3 psi overburden than at zero. The relationship between static and dynamic moduli was not firmly established for overburden pressures greater than 3 psi. These tests were made on a 15-inch-diameter bearing plate in dry sand using the NCEL atomic blast simulator. (Author).
Static And Dynamic Bearing Tests On A Strip Footing In Saturated Sand
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Author : Charles Reed White
language : en
Publisher:
Release Date : 1967
Static And Dynamic Bearing Tests On A Strip Footing In Saturated Sand written by Charles Reed White 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.
The report describes the static and dynamic loading of a 12-inch-wide by 18-inch-deep by 6-foot-long rigid footing, representing the strip footing of a subsurface shelter. Boundary conditions simulated those of a torsionally restrained footing of a flexible arch structure with simulated overburden of 20 feet at one side of the footing. Saturated and partially saturated sand was the test soil. Several soil void ratios were employed, and the effect on the relationship between load and displacement of the footing caused by soil saturation at void ratios higher than the critical void ratio was desmonstrated. (Author).
Technical Report
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Author :
language : en
Publisher:
Release Date : 1964
Technical Report written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Civil engineering categories.
Dynamically Loaded Strip Footing Buried In Dry Sand
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Author : Charles Reed White
language : en
Publisher:
Release Date : 1965
Dynamically Loaded Strip Footing Buried In Dry Sand written by Charles Reed White and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with categories.
The report describes the dynamic loading of a 12-inchwide by 18-inch-deep by 6-foot-long concrete footing, representing the strip footing of a subsurface shelter. Boundary conditions simulated those of a torsionally restrained footing of a flexible arch structure test-loaded at several different depths of burial. Static overburden pressure was applied only on one side to simulate the footing of an exterior wall. Dynamic loads from 5 to 40 kips per square foot were applied to the footing while the adjacent soil was under simulated overburden pressures of zero to 15 psi. A logarithmic relationship between bearing modulus and overburden is demonstrated for downward displacements of the footing ranging from 0.25 to 1.5 inches. The dynamic secant modulus increased exponentially with static overburden pressure. (Author).
A Model Study Of Dynamically Loaded Square Footings On Dry Sand
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Author : Jack K. Poplin
language : en
Publisher:
Release Date : 1969
A Model Study Of Dynamically Loaded Square Footings On Dry Sand written by Jack K. Poplin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Engineering models categories.
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).
Dynamic Behavior Of Strip And Spread Footings
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Author : D. G. True
language : en
Publisher:
Release Date : 1970
Dynamic Behavior Of Strip And Spread Footings written by D. G. True and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with categories.
Guide To Technical Documents
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Author : Naval Civil Engineering Laboratory (Port Hueneme, Calif.)
language : en
Publisher:
Release Date : 1974
Guide To Technical Documents written by Naval Civil Engineering Laboratory (Port Hueneme, Calif.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Bibliographical services categories.
Bibliography On Soil Dynamics
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Author : Rudolf Karl Bernhard
language : en
Publisher:
Release Date : 1969
Bibliography On Soil Dynamics written by Rudolf Karl Bernhard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1969 with Soil mechanics categories.
Navy Civil Engineer
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Author :
language : en
Publisher:
Release Date : 1965
Navy Civil Engineer written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Civil engineering categories.