Behavior Of Flexible Cylinders Buried In Sand Under Static And Dynamic Loading

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Behavior Of Flexible Cylinders Buried In Sand Under Static And Dynamic Loading

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Author : Gayle E. Albritton
language : en
Publisher:
Release Date : 1968

Behavior Of Flexible Cylinders Buried In Sand Under Static And Dynamic Loading written by Gayle E. Albritton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Materials categories.

The general objective of the investigation was to study experimentally the behavior to failure of flexible, horizontally oriented cylinders buried at various depths in dense, dry sand and subjected to either static or dynamic surface overpressures. Static and dynamic tests were conducted on 33 different cylinders, fabricated of high-yield-strength aluminum. Results indicated that collapse of the cylinders occurred while the strains in the cylinder walls were still in the elastic range. The cylinders buried at the shallow depths (zero to one-half cylinder diameter above the crown) collapsed by a catastrophic snap-through or caving of the crown. For the cylinders buried at depths of three-quarters to two cylinder diameters above the crown, the mode of collapse was an instantaneous elastic buckle that occurred at the spring line or invert of the cylinder. The collapse mode of the cylinders under dynamic overpressure was similar to that of the cylinders collapsing under static overpressure. The results of the investigation verified the applicability of an equation for predicting the static collapse overpressure for smooth-walled, horizontally oriented, buried cylindrical structures and entranceways. The hoop-compression theory was found to be applicable for analyzing the structural design to determine if the cylinder would collapse in the elastic range. (Author).

Behavior Of Stiff Cylinders Buried In Sand Under Static Loading

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Author : Charles D. Norman
language : en
Publisher:
Release Date : 1973

Behavior Of Stiff Cylinders Buried In Sand Under Static Loading written by Charles D. Norman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Cylinders categories.

Behavior Of Circular Tubes Buried In Sand Under Dynamic Loading

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Author : Algirdas G. Leskys
language : en
Publisher:
Release Date : 1968

Behavior Of Circular Tubes Buried In Sand Under Dynamic Loading written by Algirdas G. Leskys and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Materials categories.

The general objective of this investigation was to study experimentally the behavior to failure of flexible, horizontally oriented circular tubes buried at various depths in dense, dry sand and subjected to dynamic surface overpressures. Dynamic tests were conducted on ten brass tubes in the Small Blast Load Generator. The tubes had a wall thickness of 0.005 inch, an outside diameter of 4 inches, and a specially isolated 5.75-inch-long test section. The tubes were flexible and had a stiffness EI/R3 of 0.018 psi. To examine the effect of depth of burial, tests were conducted in dense, dry sand at depths ranging from 1 to 16 inches, or four tube diameters above the crown. The dynamic tests were conducted at overpressures ranging from 6.2 to 34.9 psi. Measurements were made of the applied overpressure, and the tube deflection was recorded by means of a high-speed camera linked to the pressure-time base. Results indicate that collapse of the tubes was initiated by a buckle that occurred along a longitudinal seam where the tubes were spliced. The dynamic collapse overpressure increased greatly with increased depth of burial down to a depth of one tube diameter; subsequently, the increase in collapse overpressure with increase of burial depth to four tube diameters was insignificant. The dynamic collapse overpressure was approximately the same as the static collapse overpressure as determined from correlation with previously reported results. The results of this investigation have verified the applicability of an equation for predicting the dynamic collapse overpressure of very flexible tubes. (Author).

Static Behavior Of Buried Reinforced Concrete Model Cylinders

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Author : Jay R. Allgood
language : en
Publisher:
Release Date : 1969

Static Behavior Of Buried Reinforced Concrete Model Cylinders 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 1969 with categories.

Experimental results and empirical relations are given which define the behavior of reinforced-concrete model cylinders that are buried in dry sand with their longitudinal axis parallel to the surface. The model cylinders were 9 inches in outside diameter and had a single layer of reinforcement at midsection. Thickness, percent reinforcement, and depth of cover were varied. The 12 test cylinders cracked at uniform surface pressures of less than 60 psi and subsequently deformed in such a way that the ratio of the effective stiffness of the cylindrical inclusion to the stiffness of the soil in the vertical direction remained constant. Significant moments were induced that would preclude the design of buried cylindrical shelters on the basis of the pure compression mode. The magnitude of the induced moments increased with increasing wall thickness and increased at a decreasing rate with increasing load. Empirical relations which agree reasonably well with the test data are given for permitting estimates of horizontal expansion, arching, thrust, moment, and interface pressure. (Author).

List Of Publications Of The U S Army Engineer Waterways Experiment Station

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Author : U.S. Army Engineer Waterways Experiment Station
language : en
Publisher:
Release Date : 1985

List Of Publications Of The U S Army Engineer Waterways Experiment Station written by U.S. Army Engineer Waterways Experiment Station and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Hydraulic engineering categories.

Alternatives In Energy Conservation

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Author : Frank L. Moreland
language : en
Publisher:
Release Date : 1976

Alternatives In Energy Conservation written by Frank L. Moreland and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Architecture and energy conservation 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.

List Of Publications Of The U S Army Engineer Waterways Experiment Station

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Author : Rose Mary Peck
language : en
Publisher:
Release Date : 1985

List Of Publications Of The U S Army Engineer Waterways Experiment Station written by Rose Mary Peck and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Coastal engineering categories.

List Of Publications Of The U S Army Engineers Waterway Experiment Station

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Author : United States. Army. Corps of Engineers
language : en
Publisher:
Release Date : 1976

List Of Publications Of The U S Army Engineers Waterway Experiment Station written by United States. Army. Corps of Engineers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with categories.

List Of Publications Of The U S Army Engineer Waterways Experiment Station

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Author : Waterways Experiment Station (U.S.)
language : en
Publisher:
Release Date : 1973

List Of Publications Of The U S Army Engineer Waterways Experiment Station written by Waterways Experiment Station (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Hydraulic engineering categories.