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An Experimental Study Of Soil-Structure Interaction, Stephen Connally Mitchell

Civil Engineering ETDs

Experimental data obtained from a series of static arching tests run on vertically oriented rigid-base cylindrical structures buried in a partially saturated low plasticity soil are presented. The experimental results are compared to an available analytical approach. The axial stiffness of the structure, the confined tangent modulus (stiffness) of the soil, and the applied surface overpressure were varied. The most important measurement in this experimental study was the total load carried by the structure for different values of structural stiffness and soil stiffness. The index properties, as well as the shear strength and angle of internal friction for the soil …

A Soil Stress Gage Evaluation., Caryl Martin Reiff

Civil Engineering ETDs

The static evaluation of a recently developed soil-stress gage, primarily designed for laboratory use in dry cohesionless soils, is presented. Two variations of the same basic soil stress gage design are discussed. Tests were performed to evaluate the gage linearity, temperature sensitivity, and electrical response to applied soil pressure. The gage responded linearly to pressure and the calibration curves remained stable within ± 5 percent over a period of two years. With a 10 ma bridge current, the gage had an output sensitivity of 0.040 mv per psi. Temperature changes produced signals which could not be distinguished from pressure signals. …

Trends Of Suspended Sediments In The Upper Rio Grande Basin In New Mexico., Vernon W. Norman

Civil Engineering ETDs

Man has been troubled by the sediment in streams for many thousands of years. Any information toward understanding the nature of this sediment should benefit man in his endeavor to cope with it. Available information was used to determine if trends in the annual quantities of suspended sediment exist in the Upper Rio Grande Bas in in New Mexico. The study revealed that trends do exist and quantitative values were determined for the different trend periods. An effort was made to determine the most probable cause or causes for the changes that occurred in the trends. Eighteen years of suspended …

Behavior Of Reinforced Concrete Deep Slabs Subjected To A Uniform Load., Golden E. Lane Jr.

Civil Engineering ETDs

Within the last ten years a considerable amount of research has been conducted to determine the behavior of reinforced concrete deep

structures. The major portion of this recent research has been devoted to deep beams. The results have shown a marked difference in the behavior of deep beams as compared to beams of “normal” proportions. In

this context the word "deep" implies a small span-to-depth ratio. There is not a clear-cut distinction between a "normal-depth" and a deep struc­ture; however, span-to-depth ratios less than ten would suggest deep structures. The difference in behavior between deep beams and normal depth beams …