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A Study Of The Application Of Digital Computers For Controlling Vehicle Traffic At A Signalized Intersection, John V. Wait
A Study Of The Application Of Digital Computers For Controlling Vehicle Traffic At A Signalized Intersection, John V. Wait
Civil Engineering ETDs
This study outlines a method whereby a small, specialized "on-line" digital computer could be used to control urban vehicle traffic at a signalized intersection. In the basic system proposed, the computer uses as input data a "history" of the instantaneous vehicle flow, in terms of number of cars arriving and arrival time. The data are stored for a period of 240 seconds in a magnetic drum memory. Once each 1/2 second, the computer examines the arrival pattern of cars and compares the delay being imposed on the waiting cars versus the delay which would be imposed on the cars on …
Shear Strength Of Simply Supported Prestressed Concrete Beams Having Web Enforcement, Randolph E. Holt
Shear Strength Of Simply Supported Prestressed Concrete Beams Having Web Enforcement, Randolph E. Holt
Civil Engineering ETDs
The problem of shear strength in pre-stressed concrete beams is analogous to that in ordinary reinforced concrete, since there is very little difference between reinforced concrete and pre-stressed concrete beams in the cracked condition. Until very recently, the knowledge of the shear strength of reinforced concrete members and pre-stressed concrete members was wholly statistical. Developments in the last few years have advanced it to the semi-empirical level, 5,6,7 but our knowledge of the effect that shear has on the ultimate strength of reinforced and pre-stressed concrete members is still far from complete.
The Effect Of Capillary Bleeding On The Compressive Strength Of Concrete, James L. Cramer
The Effect Of Capillary Bleeding On The Compressive Strength Of Concrete, James L. Cramer
Civil Engineering ETDs
The purpose of this study was to determine the effect that bleeding has upon the compressive strength of concrete. Keeping in mind that the compressive strength of a concrete depends highly upon the water, cement ratio, it was reasonable to expect that the changing of the water content of the fresh concrete by bleeding would have a definite effect on the final compressive strength. While tests upon tests and studies upon studies have been made of cement and concrete, few, if any, have been concerned with this problem.