RETROFIT OF REINFORCED CONCRETE COLUMNS USING PARTIALLY STIFFENED STEEL JACKETS
RETROFIT OF REINFORCED CONCRETE COLUMNS USING PARTIALLY STIFFENED STEEL JACKETS
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DOI：
10.1061/(asce)0733-9445(2003)129:6(725
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发表时间：
2003-06
期刊：
影响因子：
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通讯作者：
Yan Xiao;H. Wu
中科院分区：
文献类型：
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作者：
Yan Xiao;H. Wu
本文介绍了一种改进的钢套法加固方形或矩形截面钢筋混凝土柱，以提高强度和改善延性。为了改造现有柱，相对薄的钢板被焊接以形成用于剪切强度增强的直线护套，然后具有各种类型的期望配置的附加限制元件（加强件）被焊接到潜在塑性铰区域以确保延性行为。提出了合理的改造设计方案，并通过试验进行了评价。进行了5根1/3比例柱在0.3Agfc′轴压和反复侧向力作用下的双曲率试验。试验结果验证了部分加劲直线钢套的有效性，它不仅防止了脆性剪切破坏，而且大大提高了柱的延性，达到了超过8%的极限位移率。除了结构上的优点外，党...
This paper introduces an improved steel jacketing method to retrofit reinforced concrete columns with a square or rectangular section for enhanced strength and improved ductility. To retrofit an existing column, relatively thin steel plates were welded to form a rectilinear jacket for shear strength enhancement, and then additional confinement elements (stiffeners) with various types of desired configurations were welded to the potential plastic hinge regions to ensure a ductile behavior. A rational retrofit design procedure was suggested and evaluated through an experimental program. Five 1/3 scale model columns were tested under constant axial load of 0.3Agfc′ and cyclic lateral force in a double-curvature condition. Test results validated the efficiency of the partially stiffened rectilinear steel jacketing, which not only prevented brittle shear failure but also greatly improved the ductility of the column with achieving an ultimate drift ratio of more than 8%. Besides the structural merits, the parti...