椭圆钢管混凝土柱抗震性能研究
引用文献：
许友武 朱浩川 姚谏. 椭圆钢管混凝土柱抗震性能研究[J]. 建筑结构，2023，48（12）：22-29.
XU Youwu ZHU Haochuan YAO Jian. Research on seismic behavior of elliptical concrete-filled steel tube columns[J]. Building Structure，2023,48（12）：22-29.
摘要：为研究椭圆钢管混凝土柱的抗震性能，开展八根不同椭圆截面比的椭圆钢管混凝土柱在恒定轴压和单调及往复水平荷载下的拟静力试验。并利用OpenSEES软件建立了椭圆钢管混凝土柱的纤维单元模型，分析了椭圆截面比、钢管强度、混凝土强度、试件高度(长细比)、轴压比等参数对椭圆钢管混凝土柱抗震性能的影响。研究结果表明：椭圆钢管混凝土柱的水平荷载-位移滞回曲线较为饱满，表明其具有良好的塑性变形能力和耗能能力；纤维单元模型能较为准确地预测椭圆钢管混凝土柱的水平荷载-位移曲线；椭圆截面比、轴压比和试件高度的增加，对椭圆钢管混凝土柱的抗震性能有不利影响；钢管强度的提高会导致椭圆钢管混凝土柱的承载能力和耗能能力提高，但会导致其变形能力下降；混凝土强度的提高会导致椭圆钢管混凝土柱承载能力提高，但对其耗能能力和变形能力均有不利影响。
关键词：椭圆钢管混凝土柱；抗震性能；试验研究；纤维单元模型；参数分析；
基金：浙江省自然科学基金项目(LY18E080014)。
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[2] YANG H,LAM D,GARDNER L.Testing and analysis of concrete-filled elliptical hollow sections[J].Engineering Structures,2008,30(12):3771-3781.
[3] ZHAO X L,PACKER J A.Tests and design of concrete-filled elliptical hollow section stub columns[J].Thin-Walled Structures,2009,47(6-7):617-628.
[4] 王伟，淮运梅，陈德明.填充轻骨料混凝土的冷成型椭圆形截面钢管短柱轴压性能研究[J].建筑结构学报，2015,36(S1):207-214.
[5] CHAN T M,HUAI Y M,WANG W.Experimental investigation on lightweight concrete-filled cold-formed elliptical hollow section stub columns[J].Journal of Constructional Steel Research,2015,115:434-444.
[6] LIU F Q,WANG Y Y,CHAN T M.Behaviour of concrete-filled cold-formed elliptical hollow sections with varying aspect ratios[J].Thin-Walled Structures,2017,110:47-61.
[7] CAI Y C,QUACH W M,YOUNG B.Experimental and numerical investigation of concrete-filled hot-finished and cold-formed steel elliptical tubular stub columns[J].Thin-Walled Structures,2019,145:106437.
[8] JAMALUDDIN N,LAM D,DAI X H,et al.An experimental study on elliptical concrete filled columns under axial compression[J].Journal of Constructional Steel Research,2013,87:6-16.
[9] REN Q X,HAN L H,LAM D,et al.Tests on elliptical concrete filled steel tubular (CFST)beams and columns[J].Journal of Constructional Steel Research,2014,99:149-160.
[10] MCCANN F,GARDNER L,QIU W.Concrete-filled elliptical section steel columns under concentric and eccentric loading[C]//Eight International Conference on Advances In Steel Structures.Lisbon,Portugal,2015.
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[12] MAHGUB M,ASHOUR A,LAM D,et al.Tests of self-compacting concrete filled elliptical steel tube columns[J].Thin-Walled Structures,2017,110:27-34.
[13] 任庆新，吕天文，王庆利.椭圆形钢管混凝土长柱偏压力学性能研究[J].工业建筑，2014,44(4):7-11.
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[15] DAI X H,LAM D,JAMALUDDIN N,et al.Numerical analysis of slender elliptical concrete filled columns under axial compression[J].Thin-Walled Structures,2014,77:26-35.
[16] HASSANEIN M F,PATEL V I,EL HADIDY A M,et al.Structural behaviour and design of elliptical high-strength concrete-filled steel tubular short compression members[J].Engineering Structures,2018,173:495-511.
[17] QIU W,MCCANN F,ESPINOS A,et al.Numerical analysis and design of slender concrete-filled elliptical hollow section columns and beam-columns[J].Engineering Structures,2017,131:90-100.
[18] SÜLEYMAN IPEK,ERDOGAN AYŞEGÜL,ESRA METE GÜNEYISI.Compressive behavior of concrete-filled double skin steel tubular short columns with the elliptical hollow section[J].Journal of Building Engineering,2021,38:102200.
[19] 刘习超，查晓雄.椭圆形钢管混凝土构件性能的研究Ⅰ:轴压短柱和长柱[J].建筑钢结构进展，2011(1):8-14.
[20] 钢管混凝土结构技术规范：GB 50936—2014[S].北京：中国建筑工业出版社，2014.
[21] 马贤峰.椭圆钢管混凝土柱抗震性能试验与计算方法研究[D].合肥：合肥工业大学，2019.
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[23] FANG C,ZHOU F,WU Z Y,et al.Concrete-filled elliptical hollow section beam-columns under seismic loading[J].Journal of Structural Engineering,2020,146(8):04020144.
[24] 建筑抗震设计规范：GB 50011—2010 [S].2016年版.北京：中国建筑工业出版社，2016.
[25] 吴静云.椭圆钢管与椭圆钢管混凝土柱柱的力学性能与设计方法[D].杭州：浙江大学，2015.
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Research on seismic behavior of elliptical concrete-filled steel tube columns
Abstract: In order to study the seismic behavior of elliptical concrete-filled steel tube(ECFST) columns, pseudo static test of 8 ECFST columns with different elliptic section ratio under constant axial compression and monotonic and cyclic lateral loading. The fiber element model of ECFST columns was established by using OpenSEES software to study the influence of elliptic section ratio, steel tube strength, concrete strength, height(slenderness ratio)and axial compression ratio on the seismic performance of ECFST columns. The results show that the horizontal load-displacement hysteresis curves of ECFST columns are relatively plump, which indicates that the columns have good plastic deformation and energy dissipation capacity. The fiber element model can accurately predict the horizontal load-displacement curve of ECFST columns. The increase of elliptic section ratio, axial compression ratio and slenderness ratio has an adverse effect on the seismic behavior of ECFST columns. The increase of steel tube strength leads to the increase of bearing capacity and energy dissipation capacity of ECFST columns, but leads to the decrease of deformation capacity. The increase in concrete strength leads to the increase in bearing capacity of ECFST columns, but the decrease in energy dissipation capacity and deformability.
Keywords: elliptical concrete-filled steel tube column; seismic behavior; experimental study; fiber element model; parametric analysis
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