| 偏心荷载下钢管混凝土圆形短柱的非线性分析 |
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| 作者姓名： | Sam Fragomeni |
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| 摘 要： | 提出了一个有效的理论模型,用于钢管混凝土圆形短柱在偏心荷载作用下的非线性弹塑性分析。理论模型中考虑了普通或高强钢管中填充的普通和高强混凝土的精确材料构成关系,用于计算混凝土强度和延性升高时对约束效应的影响。将偏心荷载下对钢管混凝土圆柱预测的极限抗弯强度和完整的弯矩-曲率曲线,与现有的试验数据进行对比以验证理论模型的准确性。利用经过验证的理论模型对圆形钢管混凝土梁柱的基本性能包括径厚比、混凝土抗压强度、钢筋屈服强度、轴向荷载水平和截面形状进行了研究。基于大量的数值研究,针对圆形钢管混凝土梁柱提出了一个用于确定极限纯弯强度的设计模型。理论模型和公式可以对偏心荷载下圆形钢管混凝土梁柱的非线性弹塑性性能进行有效的模拟和设计。
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| 关 键 词： | 钢管混凝土 复合梁柱 延性 纤维元分析 非线性分析 强度 |
Nonlinear Analysis of Circular Concrete-Filled Steel Tubular Short Columns Under Eccentric Loading |
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| Sam Fragomeni.Nonlinear Analysis of Circular Concrete-Filled Steel Tubular Short Columns Under Eccentric Loading[J].Steel Construction,2010(1). |
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| Authors: | Qing Quan Liang Sam Fragomeni |
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| Affiliation: | Qing Quan Liang and Sam Fragomeni |
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| Abstract: | This paper presents an effective theoretical model for the nonlinear inelastic analysis of circular concrete-filled steel tubular (CFST) short columns under eccentric loading.Accurate material constitutive relationships for normal and high strength concrete confined by either normal or high strength circular steel tubes are incorporated in the theoretical model to account for confinement effects that increase both the strength and ductility of concrete.The predicted ultimate bending strengths and complete m... |
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| Keywords: | Concrete-filled steel tubes Composite beam-columns Ductility Fiber element analysis Nonlinear analysis Strength |
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