- 摘 要
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（天津大學(xué)濱海土木工程結(jié)構(gòu)與安全教育部重點(diǎn)實(shí)驗(yàn)室, 天津 300072）
［摘要］對5根RC矩形截面短柱在低周往復(fù)荷載作用下的抗震性能進(jìn)行了試驗(yàn)研究，試驗(yàn)中在保持軸壓比恒定的情況下水平方向采用3種雙向加載路徑（45°斜向、八字形和方形）以及2種單向加載路徑（X向和Y向）。主要研究了不同加載路徑對RC短柱的耗能能力、受剪承載力、剛度和延性等抗震性能的影響。結(jié)果表明：雙向加載降低了試件的延性，大大降低了試件的承載力，但使得試件的累積滯回耗能顯著增加；加載路徑對試件的延性和剛度退化影響較小，對試件的累積滯回耗能影響較大。
［關(guān)鍵詞］RC短柱； 雙向加載； 加載路徑； 抗震性能
中圖分類號：TU375-3文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2018)02-0055-05
Experimental study on seismic performance of RC short column under varied loading paths
Li Zhongxian, Wei Di, Gao Ying
(Key Laboratory of Coast Civil Structure Safety of China Ministry of Education, Tianjin University, Tianjin 300072, China)
Abstract:The seismic performance of 5 reinforced concrete short columns with rectangular section under cyclic load was studied. In the case of a constant axial compression ratio in the test, 3 kinds of two-way loading paths (45 degrees oblique direction, splayed direction and square direction) and 2 one-way loading paths (X direction and Y direction) in horizontal direction were adopted. The effects of different loading paths on the energy dissipation capacity, shear capacity, stiffness and ductility of reinforced concrete short columns were studied. The results show that the two-way loading reduces the ductility of the specimens and greatly reduces the bearing capacity of the specimens, but makes the cumulative hysteretic energy of the specimens increase significantly; the loading path has little influence on the ductility and stiffness degradation of the specimens, and has a greater influence on the cumulative hysteretic energy dissipation of the specimens.
Keywords:RC short column; two\|way loading; loading path; seismic performance
*國家“973”計(jì)劃課題(2011CB013603)，國家自然科學(xué)基金項(xiàng)目(91315301，51378341)。
作者簡介：李忠獻(xiàn)，博士，長江學(xué)者特聘教授，博士生導(dǎo)師，Email: zxli@tju.edu.cn。
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