Shear Behavior of Tied and Multi-Spiral Columns with High Strength Steel and Concrete Under Low Axial Load
碩士 === 國立臺灣科技大學 === 營建工程系 === 100 === ABSTRACT The development of High Strength Concrete (HSC) and High Strength Steel (HSS) facilitate the realization of high-rise building especially in seismic region to resist earthquake excitation. Innovative multi-spiral shear reinforcement which is designed fo...
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ndltd-TW-100NTUS55120242019-05-15T20:43:22Z http://ndltd.ncl.edu.tw/handle/vhpe9p Shear Behavior of Tied and Multi-Spiral Columns with High Strength Steel and Concrete Under Low Axial Load Shear Behavior of Tied and Multi-Spiral Columns with High Strength Steel and Concrete Under Low Axial Load NURAZIZ HANDIKA NURAZIZ HANDIKA 碩士 國立臺灣科技大學 營建工程系 100 ABSTRACT The development of High Strength Concrete (HSC) and High Strength Steel (HSS) facilitate the realization of high-rise building especially in seismic region to resist earthquake excitation. Innovative multi-spiral shear reinforcement which is designed for square cross section column offers technical and cost advantages comparing to conventional tied column stirrup. This research has objective to recognize the shear behavior of two types of stirrups with high strength steel and concrete under low axial load. The square hoops columns and multi-spiral columns are tested under 20% and 10% axial load ratio, respectively. Concrete compressive strength (70 MPa and 100 MPa) and spacing of the transverse reinforcement are two parameters that will be examined. Longitudinal and transversal reinforcements with specified yield strengths of 685 MPa and 785 MPa, respectively, are considered. Critical crack angle; shear strain and curvature; stress of transverse reinforcement; effect of axial compression load of six large-scale columns will be explained. Test results show that the maximum strength of columns appears before the yielding of stirrups. Thus, stress at transverse reinforcement that can be predicted from drift ratio and stress at hoops relationship derived from test result becomes important as the limitation for design calculation. Moreover, smaller critical crack angle, stiffer column and higher lateral strength will be occurred from higher axial load application. Current codes provisions in shear strength provide the conservative estimation as 45 degrees of crack angle applied. On the other hand, models proposed by researchers overestimate the measured strength. YU-CHEN OU YU-CHEN OU 2012 學位論文 ; thesis 321 en_US |
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碩士 === 國立臺灣科技大學 === 營建工程系 === 100 === ABSTRACT
The development of High Strength Concrete (HSC) and High Strength Steel (HSS) facilitate the realization of high-rise building especially in seismic region to resist earthquake excitation. Innovative multi-spiral shear reinforcement which is designed for square cross section column offers technical and cost advantages comparing to conventional tied column stirrup. This research has objective to recognize the shear behavior of two types of stirrups with high strength steel and concrete under low axial load. The square hoops columns and multi-spiral columns are tested under 20% and 10% axial load ratio, respectively. Concrete compressive strength (70 MPa and 100 MPa) and spacing of the transverse reinforcement are two parameters that will be examined. Longitudinal and transversal reinforcements with specified yield strengths of 685 MPa and 785 MPa, respectively, are considered. Critical crack angle; shear strain and curvature; stress of transverse reinforcement; effect of axial compression load of six large-scale columns will be explained. Test results show that the maximum strength of columns appears before the yielding of stirrups. Thus, stress at transverse reinforcement that can be predicted from drift ratio and stress at hoops relationship derived from test result becomes important as the limitation for design calculation. Moreover, smaller critical crack angle, stiffer column and higher lateral strength will be occurred from higher axial load application. Current codes provisions in shear strength provide the conservative estimation as 45 degrees of crack angle applied. On the other hand, models proposed by researchers overestimate the measured strength.
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YU-CHEN OU |
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YU-CHEN OU NURAZIZ HANDIKA NURAZIZ HANDIKA |
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NURAZIZ HANDIKA NURAZIZ HANDIKA |
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NURAZIZ HANDIKA NURAZIZ HANDIKA Shear Behavior of Tied and Multi-Spiral Columns with High Strength Steel and Concrete Under Low Axial Load |
author_sort |
NURAZIZ HANDIKA |
title |
Shear Behavior of Tied and Multi-Spiral Columns with High Strength Steel and Concrete Under Low Axial Load |
title_short |
Shear Behavior of Tied and Multi-Spiral Columns with High Strength Steel and Concrete Under Low Axial Load |
title_full |
Shear Behavior of Tied and Multi-Spiral Columns with High Strength Steel and Concrete Under Low Axial Load |
title_fullStr |
Shear Behavior of Tied and Multi-Spiral Columns with High Strength Steel and Concrete Under Low Axial Load |
title_full_unstemmed |
Shear Behavior of Tied and Multi-Spiral Columns with High Strength Steel and Concrete Under Low Axial Load |
title_sort |
shear behavior of tied and multi-spiral columns with high strength steel and concrete under low axial load |
publishDate |
2012 |
url |
http://ndltd.ncl.edu.tw/handle/vhpe9p |
work_keys_str_mv |
AT nurazizhandika shearbehavioroftiedandmultispiralcolumnswithhighstrengthsteelandconcreteunderlowaxialload AT nurazizhandika shearbehavioroftiedandmultispiralcolumnswithhighstrengthsteelandconcreteunderlowaxialload |
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