Civil Engineering ETDs

Publication Date

5-31-1965

Abstract

Experiments to determine the effects of boundary friction losses on static and dynamic vertical stress transmission and to determine the stress-strain relationship of standard 20-30 Ottawa sand in 8-inch-I.D. tanks to be used in burial structure interaction studies are presented. In these tests the tank height, boundary condition, sand density, and overpressure rise time were varied. The use of a greased rubber membrane proved to be a reliable method of minimizing the boundary friction losses thus creating a strain field that was independent of the tank height. Vertical stress transmission was not affected by the overpressure load rate. The stress-strain relationships were found to be affected by the boundary shear stresses when a greased rubber membrane was not used. The free-field conditions are defined in the tanks used in the investigation. The author wishes to express his appreciation to the following University of New Mexico personnel: Dr. Eugene Zwoyer, Director of the Air Force Shock Tube Facility, where the research was conducted, for his continued encouragement and guidance; Mr. Marion M. Cottrell, Associate Professor of Civil Engineering, Mr. William W. Hakala, Lecturer in Civil Engineering, and Dr. George E. Triandafilidis, Associate Professor of Civil Engineering, for their valuable recommendations as members of the thesis committee; Mr. P. A. Abbott, Research Assistant Engineering at the facility, for the initiation and direction of this investigation; Mr. Dwane Brewer, Research Associate Engineer in charge of electronic instrumentation at the facility, for developing the electronic recording equipment; Dr. Jim Roach, Laboratory Assistant, for conduction of a large portion of the tests; and the engineering research staff at the facility for their many valuable suggestions.

Document Type

Thesis

Language

English

Degree Name

Civil Engineering

Level of Degree

Masters

Department Name

Civil Engineering

First Committee Member (Chair)

Marion Marvin Cottrell

Second Committee Member

William Walter Hakala

Third Committee Member

George Emmanuel Triandafilidis

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