Effects of transverse reinforcement on flexural behaviour of high-strength concrete columns
Effects of transverse reinforcement on flexural behaviour of high-strength concrete columns
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DOI：
10.1016/j.engstruct.2003.08.004
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发表时间：
2004
影响因子：
5.5
通讯作者：
S. Hwang;H. Yun
中科院分区：
文献类型：
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作者：
S. Hwang;H. Yun
本实验研究进行了八个三分之一比例柱的高强度混凝土（HSC）的行为。每根立柱均承受相当于立柱轴向载荷能力30%的恒定轴向载荷和循环水平载荷诱导的反向弯矩。研究的变量为横向钢筋体积比（ρs=1.58，2.25%）、拉结配置（H型、C型和D型）和拉结屈服强度（fyh=549和779 MPa）。试验结果表明，各柱的抗弯承载力均超过了现行设计规范中按等效混凝土应力块计算的抗弯承载力。横向钢筋数量比ACI 318-02抗震规定要求高42%的柱表现出延性行为。轴向荷载为轴向荷载能力的30%时，建议横向钢筋的屈服强度保持等于或低于549 MPa。使用Yong等人提出的约束模型进行抗弯强度分析，能够准确预测试验弯矩承载力。
This experimental investigation was conducted to examine the behaviour of eight one-third scale columns made of high-strength concrete (HSC). Each column was subjected to a constant axial load corresponding to 30% of the column axial-load capacity and a cyclic horizontal load-inducing reversed bending moment. The variables studied in this research are the volumetric ratio of transverse reinforcement (ρs=1.58, 2.25%), tie configuration (Type H, Type C and Type D) and tie yield strength (fyh=549 and 779 MPa). Test results show that the flexural strength of every column exceeds the calculated flexural capacity based on the equivalent concrete stress block used in the current design code. Columns with 42% higher amounts of transverse reinforcement than that required by seismic provisions of ACI 318-02 showed ductile behaviour. With an axial-load of 30% of the axial load capacity, it is recommended that the yield strength of transverse reinforcement be held equal to or below 549 MPa. Analysis of the flexural strength using the confinement model presented by Yong et al. enabled the experimental moment capacities to be predicted accurately.