Influence Of Soil Modulus On The Behavior Of Cylinders Buried In Sand
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Influence Of Soil Modulus On The Behavior Of Cylinders Buried In Sand
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Author : Jay R. Allgood
language : en
Publisher:
Release Date : 1968
Influence Of Soil Modulus On The Behavior Of Cylinders Buried In Sand 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 1968 with Cylinders categories.
Experimental and theoretical results are given that provide information on the influence of soil properties on the behavior of buried cylinders whose axes are parallel to the surface. Sand type, sand density, and cylinder stiffness were varied in 12 static tests on 5-inch-diameter thin-metal cylinders. The stiffness of these cylinders was less than that of others in the literature for which complete information on soil properties was available. The main contribution of the research presented is that it provides a unified method for determining deflections and the critical buckling load, both of which are based on the one-dimensional confined compression modulus measured in a standard laboratory test. This has not been done heretofore. Also, a relation for arching across buried cylinders is given which permits computation of the thrust at the haunches. Another feature of the work is the development of a matrix solution for determining the interface pressure distribution from measurements of strains in the cylinder. Thus, in effect, the cylinders can be used as biaxial soil pressure sensors. (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).
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.
Laboratory Load Tests On Buried Flexible Pipe
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Author : Amster K. Howard
language : en
Publisher:
Release Date : 1970
Laboratory Load Tests On Buried Flexible Pipe written by Amster K. Howard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Pipe categories.
Evaluation Of A Three Dimensional Stress Cell For Granular Soils
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Author : T. K. Lew
language : en
Publisher:
Release Date : 1972
Evaluation Of A Three Dimensional Stress Cell For Granular Soils written by T. K. Lew and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with categories.
The study presents the results of tests of rigid, solid, spherical, three-dimensional stress cells for measuring the complete state of stress at a point in a soil field under static or dynamic loading. In addition, a theory is presented for defining the behavior of a spherical stress cell embedded in nonlinear materials. The test results indicate that the stress cells are excellent for making static measurements in sand but that their adequacy for dynamic measurements requires further evaluation. (Author).
Design Of Cylindrical Reinforced Concrete Tunnel Liners To Resist Air Overpressures
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Author :
language : en
Publisher:
Release Date : 1968
Design Of Cylindrical Reinforced Concrete Tunnel Liners To Resist Air Overpressures written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with categories.
Housing And Planning References
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Author :
language : en
Publisher:
Release Date : 1968
Housing And Planning References written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with City planning categories.
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).
Journal Of The Soil Mechanics And Foundations Division
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Author : American Society of Civil Engineers. Soil Mechanics and Foundations Division
language : en
Publisher:
Release Date : 1971
Journal Of The Soil Mechanics And Foundations Division written by American Society of Civil Engineers. Soil Mechanics and Foundations Division and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Engineering geology categories.
Publication Index 1966 1968
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Author :
language : en
Publisher:
Release Date : 1969
Publication Index 1966 1968 written by 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.