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Behavior of Normal and High Strength Confined Concrete Under Compression Load

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dc.contributor.advisor Zerayohhanes, Girma (PhD)
dc.contributor.author Gossaye, Amare
dc.date.accessioned 2018-07-24T06:24:02Z
dc.date.available 2018-07-24T06:24:02Z
dc.date.issued 2016-03
dc.identifier.uri http://localhost:80/xmlui/handle/123456789/9891
dc.description.abstract In this study high strength concrete with a specific compressive control cube strength at 28days of age fcu=50MPa, and normal-strength concrete with a specific compressive control cube strength at 28 days of age fcu=41MPa are considered to study the confined property of highstrength and normal-strength concrete under axial compression load. Material used for highstrength concrete are; OPC Derba cement, basaltic coarse aggregate, crushed sand, water, and conplast SP430 chemical admixture. And material used for normal-strength concrete are; OPC Derba cement, crushed sand, river sand, basaltic coarse aggregate and water. The mix design for high-strength concrete was designed to obtain fcu=60Mpa, but from the test result it is obtained fcu=50MPa, and this compressive strength of concrete is considered to study the behavior of high-strength concrete in this research. Deformed reinforcing bar diameter 8mm with yield strength about 503MPa and 580Mpa were used to confine the specimen. The reinforced specimens contained rectilinear lateral steel ties, and four diameter 10mm longitudinal reinforcement with yield strength about 628MPa was used in the tested specimens. Test can be performed on 18 prismatic high-strength concrete specimens and 18 prismatic normal-strength concrete specimens having a size of (150mm150mm300mm) with three steel tie spacing (s=54mm,68mm,90mm). The test specimen include 6 plain unreinforced prismatic specimens; 3 for high strength and 3 for normal strength concrete. Specimens were tested by compression testing machine having a capacity of 3000KN subjected to generalized compression load with rate of loading 0.28MPa/s. The test parameters considered in this study are; concrete compressive strength, volumetric ratio and spacing of transverse reinforcement and yield strength of transverse reinforcement. The models proposed by previous researchers were used in addition to the test result to study the effect of test parameters. Finally the influence of confinement and concrete compressive strength on the behavior of high-strength and normal-strength concrete specimens confined by rectilinear steel tie bars were examined. From the result obtained in the study the effect of volumetric ratio and spacing of transverse reinforcement has more pronounced effect on the behavior of normal and high-strength column specimens as compared to the other test parameters, which is agreed with the result of previous researchers. en_US
dc.language.iso en en_US
dc.publisher Addis Ababa University en_US
dc.subject Structures en_US
dc.title Behavior of Normal and High Strength Confined Concrete Under Compression Load en_US
dc.type Thesis en_US

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