A Model Study Of Dynamically Loaded Square Footings On Dry Sand
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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).
Measuring Soil Properties In Vehicle Mobility Research
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Author : Klaus-Jurgen Melzer
language : en
Publisher:
Release Date : 1971
Measuring Soil Properties In Vehicle Mobility Research written by Klaus-Jurgen Melzer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Soil mechanics categories.
Dynamic Response Of Rectangular Footings In Clay And Sand
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Author : Hugh M. Taylor
language : en
Publisher:
Release Date : 1972
Dynamic Response Of Rectangular Footings In Clay And Sand written by Hugh M. Taylor and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Concrete footings categories.
Geological Survey Bulletin
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Author :
language : en
Publisher:
Release Date : 1972
Geological Survey 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 1972 with Geology categories.
Abstracts Of North American Geology
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Author : Geological Survey (U.S.)
language : en
Publisher:
Release Date : 1970
Abstracts Of North American Geology written by Geological Survey (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Geology categories.
Bibliography Of North American Geology
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Author :
language : en
Publisher:
Release Date : 1969
Bibliography Of North American Geology 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 Geology categories.
1919/28 cumulation includes material previously issued in the 1919/20-1935/36 issues and also material not published separately for 1927/28. 1929/39 cumulation includes material previously issued in the 1929/30-1935/36 issues and also material for 1937-39 not published separately.
Effects Of Relative Density And Pulse Duration On Dynamic Response Of Footings Buried In Sand
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Author : Jack K. Poplin
language : en
Publisher:
Release Date : 1969
Effects Of Relative Density And Pulse Duration On Dynamic Response Of Footings Buried In 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 Foundations categories.
Model Study Of The Response Of Silo Type Structures In Dry Sand Under One Dimensional Plane Wave Loading
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Author : Edward Belk Perry
language : en
Publisher:
Release Date : 1973
Model Study Of The Response Of Silo Type Structures In Dry Sand Under One Dimensional Plane Wave Loading written by Edward Belk Perry and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Blast effect categories.
Froude modeling, where strength and modulus properties and surface overpressure scale as the length scale, is a potential method for determining the structural response of underground protective structures at overpressures in excess of existing laboratory devices provided the strength and modulus properties can be adequately scaled. The results of this study indicated that Froude model tests on silo-type structures in dry sand under one-dimensional plane wave loading could predict the loading response of a prototype constructed using a length scale of three. The primary contribution of this study was to focus attention on the necessity of scaling the unloading soil moduli if Froude modeling is to successfully predict the time-history of a soil-structure system whenever the characteristics of the problem (loading, geometry, etc.) are such that unloading occurs in the soil.
Similarity Methods In Engineering Dynamics
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Author : P.S. Westine
language : en
Publisher: Elsevier
Release Date : 2012-12-02
Similarity Methods In Engineering Dynamics written by P.S. Westine and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Technology & Engineering categories.
Here is the second revised and updated edition of probably the most practical sourcebook on similarity methods and modeling techniques available. Written by leading authorities who incorporate many of the latest advances in the field, this new work maps out techniques for modeling as well as instrumentation and data analysis for an extremely wide array of problems in engineering dynamics.This practical reference uses experimental test data on various engineering problems demonstrating exactly how and why these similarity methods work. The problems involve spread of oil slicks, explosive cratering, car crashes, space vehicle heat exchange, explosive forming, and more. The spectrum of topics covered and number of examples are far greater than in other texts. Of particular importance are the dissimilar material modeling techniques which bring new versatility and freedom to the modeler in structural dynamics. The book also contains a clear, in-depth discussion of the theory underlying modeling and includes alternate methods for developing model laws. The work will undoubtedly prove invaluable to every professional involved in testing or design of dynamic experiments.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1966
Scientific And Technical Aerospace Reports 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 Aeronautics categories.