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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.
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.
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).
Author: Edward Belk Perry Publisher: ISBN: Category : Blast effect Languages : en Pages : 398
Book Description
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.
Author: Xiaoxing Zhang Publisher: World Scientific ISBN: 9813220376 Category : Technology & Engineering Languages : en Pages : 1140
Book Description
2016 International Conference on Electrical Engineering and Automation (EEA2016) was held in Hong Kong, China from June 24th-26th, 2016. EEA2016 has provided a platform for leading academic scientists, researchers, scholars and students around the world, to get together to compare notes, and share their results and findings, in areas of Electronics Engineering and Electrical Engineering, Materials and Mechanical Engineering, Control and Automation Modeling and Simulation, Testing and Imaging, Robotics, Actuating and Sensoring.The conference had received a total of 445 submissions. However, after peer review by the Technical Program Committee only 129 were selected to be included in this conference proceedings; based on their originality, ability to test ideas, and contribution to the understanding and advancement in Electronics and Electrical Engineering.
Author: Sarhosis, Vasilis Publisher: IGI Global ISBN: 1522502327 Category : Technology & Engineering Languages : en Pages : 526
Book Description
The Discrete Element Method (DEM) has emerged as a solution to predicting load capacities of masonry structures. As one of many numerical methods and computational solutions being applied to evaluate masonry structures, further research on DEM tools and methodologies is essential for further advancement. Computational Modeling of Masonry Structures Using the Discrete Element Method explores the latest digital solutions for the analysis and modeling of brick, stone, concrete, granite, limestone, and glass block structures. Focusing on critical research on mathematical and computational methods for masonry analysis, this publication is a pivotal reference source for scholars, engineers, consultants, and graduate-level engineering students.
Author: Don R. Denton
Author: Don R. Denton
Author: Robert K. Tener
Author: Jack K. Poplin
Author: Edward Belk Perry
Author: 
Author: American Society of Civil Engineers. Engineering Mechanics Division
Author: Waterways Experiment Station (U.S.)
Author: Xiaoxing Zhang
Author: 
Author: Sarhosis, Vasilis