| 钢管混凝土短柱的抗震性能和抗剪强度分析 |
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| 摘 要： | 钢管混凝土短柱在地震中易遭受脆性剪切破坏。为评估圆形或方形钢管短柱的性能,对轴向恒载和侧向往复荷载组合作用下的8个短柱构件进行了测试。测试的构件包括3个圆形钢管柱和3个方形钢管柱,另外2个为普通钢筋混凝土短柱(其中一个为圆形柱,另一个为方柱)。试验结果表明:普通钢筋混凝土短柱在遭受脆性剪切破坏时延性很差,但由于外层薄钢管对核心混凝土的包裹作用,使得钢管混凝土短柱的延性明显增强。圆形钢管混凝土短柱的侧向承载强度随着轴向加载率的增大而增大,但轴向加载率对其塑性变形能力的作用不大。对于方形钢管混凝土短柱,抗剪强度会随着轴向加载率的增大而增大,但塑性变形能力会随着轴向加载率的增加而减小。钢管混凝土短柱中,圆形钢管比方形钢管能更有效地防止核心混凝土发生剪切破坏。基于试验和分析结果,采用了改进的ACI设计方法来计算方形和圆形钢管柱的名义抗剪强度。
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| 关 键 词： | 钢管混凝土短柱 剪切破坏 轴向加载率 延性 名义抗剪强度 |
Seismic Behavior and Shear Strength of Tubed RC Short Columns |
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| Xuhong Zhou , Jiepeng Liu. Seismic Behavior and Shear Strength of Tubed RC Short Columns[J]. Steel Construction, 2010, 0(2) |
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| Authors: | Xuhong Zhou Jiepeng Liu |
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| Abstract: | Reinforced concrete(RC) short columns are vulnerable to brittle shear failure during an earthquake.The objective of this research is to evaluate the performance enhancement of RC short columns tubed with circular or square tubes.Eight short columns were tested under combined constant axial load and cyclic lateral load.The tested specimens included three circular tubed RC(CTRC) columns and three square tubed RC(STRC) columns.Two common RC short columns including one circular RC column and one square RC colum... |
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| Keywords: | Tubed RC short column Shear failure Axial load ratio Ductility Nominal shear strength |
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