Displacement-based seismic design of high-strength concrete frame columns |
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Authors: | Guojun ZHANG Xilin LU Jianxin LIU |
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Affiliation: | (1) Architecture Engineering Institute, Shanghai Normal University, Shanghai, 201418, China;(2) Research Institute of Structural Engineering and Disaster Reduction, College of Civil Engineering, Tongji University, Shanghai, 200092, China |
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Abstract: | Based on the testing results of 108 high-strength concrete columns under constant axial loading and horizontal cyclic loading,
the relations between the drift ratio at yield, the maximum displacement drift, the limiting displacement drift, the ductility
ratio of testing columns and shear span-to-depth ratio, axial compression ratio, confining reinforcement characteristic values,
the ratio of cover area to confined core area as well as longitudinal reinforcement ratio are discussed in this paper. Then
the relations between limiting displacement drifts and axial compression ratio, confining reinforcement characteristic values
and the ratio of cover area to confined core area are analytically regressed. Subsequently the relations between confining
reinforcement characteristic values and axial compression ratio, the limiting displacement drift, and the practical formula
used to calculate confining reinforcement characteristic values are put forward. In the end the minimum confining reinforcement
characteristic values in the dense hoop regions of high-strength concrete columns are presented by comparatively analysis,
and compared with ones in the design code (GB 50010-2002, P. R. China).
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Translated from Journal of Tongji University (Natural Science), 2007, 35(2): 143–148 译自: 同济大学学报(自然科学版)] |
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Keywords: | seismic design high-strength concrete minimum confining reinforcement characteristic value limiting displacement drift ductility |
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