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Model Study of a Buried Arch Subjected to Dynamic Loading

Author: Robert K. Tener
Publisher:
ISBN:
Category : Aluminum
Languages : en
Pages : 212

Book Description

Model Study of Dynamically Loaded Arch Structures

Author: Don R. Denton
Publisher:
ISBN:
Category : Building, Bombproof
Languages : en
Pages : 58

Book Description
As a part of this program, a series of laboratory model and prototype structures was tested dynamically in the Blast Load Generator facility located at WES to evaluate the use of scale-model tests in predicting the elastic response of a laboratory-size prototype structure to dynamic loads. Presented in this paper are the results of tests of three metal arch structures having diameters of 8, 16, and 24 in., respectively, placed at various depths of burial in dry sand and subjected to ground surface overpressures ranging from 57 to 196 psi.

Similitude Study of Flexible Buried Arches Subjected to Blast Loads

Author: Jimmy P. Balsara
Publisher:
ISBN:
Category : Aluminum
Languages : en
Pages : 168

Book Description
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).

A Model Study of Dynamically Loaded Square Footings on Dry Sand

Author: Jack K. Poplin
Publisher:
ISBN:
Category : Engineering models
Languages : en
Pages : 114

Book Description
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).

Model Study of a Buried Arch Subjected to Dynamic Loading

Model Study of Dynamically Loaded Arch Structures

Similitude Study of Flexible Buried Arches Subjected to Blast Loads

A Model Study of Dynamically Loaded Square Footings on Dry Sand

The Dynamic Response of Buried Concrete Arches

Scientific and Technical Aerospace Reports

The Application of Similitude to Protective Construction Research

The Shock and Vibration Bulletin

Shock, Vibration, and Associated Environments

Dynamic Response of a Model Buried Field Shelter, Project LN314, Operation Prairie Flat