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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/1429

Authors: Riyad, Zeidan
Advisors: Prof. Negussie Tebedje
Copyright: 2005
Date Added: 15-Oct-2008
Publisher: Addis Ababa University
Abstract: ABSTRACT The Confinement of transverse reinforcement is theoretically explained and its effectiveness is investigated experimentally and analytically. The importance of the spacing of the lateral ties, the amount of stirrups, the yield strengths of the stirrups and the amount of longitudinal reinforcement bars are evaluated. A total of sixty concrete columns with a cross section of 150x150 mm were tested in order to investigate the enhancement in strength and ductility caused by rectilinear ties. The specimens were subjected to axial compression and the deformational behavior of the concrete core was studied. The stress-strain characteristics of confined concrete were examined. The confinement models proposed by various researchers were used to predict the results of the test conducted and are compared with the experimental results. Observation on the test results indicates that transverse reinforcement results in significant enhancement in the ductility of concrete column. However, the compression strength enhancement was found to be little. It was found that the spacing of stirrups is of the greatest importance for the post-peak behavior of concrete column under axial load. However, due to size limitation, and lack of uniformly distributed longitudinal reinforcement, the stress-strain characteristics of experiment results in comparison with that predicted by the existing confinement model show considerable deviation in the post strength zones. A better achievement can be obtained by considering larger size of specimens with larger size and uniformly distributed longitudinal reinforcement.
Description: A thesis submitted to the School of Graduate studies Addis Ababa University in partial fulfillment of the requirements of the degree of Master of Science in Structural Engineering
URI: http://hdl.handle.net/123456789/1429
Appears in:Thesis - Civil Engineering

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