- 摘 要
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(1 天津大學建筑設(shè)計規(guī)劃研究總院有限公司, 天津 300073; 2 天津大學建筑工程學院, 天津300072; 3 濱海土木工程結(jié)構(gòu)與安全教育部重點實驗室 (天津大學), 天津 300072)
摘要: 為提升方鋼管混凝土組合異形柱加工制作的便捷性與精度、減小焊接對板件變形的影響,提出了新型 H 型鋼連接 L 形方鋼管混凝土組合異形柱(LCFST-H),并研究其偏壓荷載下的力學性能. 設(shè)計了兩個試件進行偏壓加載試驗,建立計算模型開展有限元分析. 在驗證有限元模型準確性的基礎(chǔ)上,分析了 H 型鋼連接板尺寸、方鋼管截面尺寸、柱高度等參數(shù)對組合異形柱偏壓受力性能的影響. 結(jié)果表明:構(gòu)件破壞形式為整體彎曲失穩(wěn)與局部屈曲破壞,達到極限承載力后,單肢柱之間仍能通過 H 型鋼連接板很好地協(xié)同工作,具備一定承載能力,體現(xiàn)出較高的延性性能. 方鋼管截面尺寸和柱高度對其偏壓性能影響較大. 結(jié)合相關(guān)規(guī)范,給出了 H 型鋼連接 L 形方鋼管混凝土組合異形柱單向偏壓承載力計算公式,公式計算結(jié)果與有限元結(jié)果吻合較好.
關(guān)鍵詞: L 形方鋼管混凝土組合異形柱; H 型鋼; 偏壓試驗; 參數(shù)分析; 承載力計算
中圖分類號:TU398. 9 文獻標志碼:A 文章編號:1002-848X(2023)03-0064-08
DOI:10. 19701 / j. jzjg. 20201116
Research on behavior of L-shaped columns composed of concrete-filled square steel tubes connected by H-shaped steel subjected to eccentric compression
YAN Xiangyu1,2, ZHANG Tianzhu1, ZHANG Xi1, CHEN Zhihua2,3, LIU Jie2
(1 Tianjin University Research Institute of Architectural Design and Urban Planning Co. , Ltd. , Tianjin 300073,China; 2 School of Civil Engineering, Tianjin University, Tianjin 300072, China; 3 Key Laboratory of CoastCivil Structure Safety of the Ministry of Education (Tianjin University), Tianjin 300072, China)
Abstract:In order to improve the fabrication convenience and precision and reduce the welding effect on the deformation ofsteel plates for special-shaped columns composed of concrete-filled square steel tubes, a new type of L-shaped columnscomposed of concrete-filled square steel tubes connected by H-shaped steel(LCFST-H) was proposed, and the mechanicalperformance of this new LCFST-H column under eccentric compression was studied. Two specimens were designed to carryout eccentric compression loading test, and calculation model was established to carry out the finite element analysis. Basedon the verifying the accuracy of the finite element model, the parametric study was conducted to investigate the effects of thesectional dimensions of the H-shaped steel connection plate and spuare steel tube, and the column height on the mechanicalperformance of L-shaped column under eccentric compression. The results show that the failure mode of the LCFST-Hcolumns is bending instability accompanied with local buckling. The mono-columns work cooperatively with the H-shapedsteel connection plate after reaching the ultimate load and the specimens maintain considerable carrying capacity, reflectinghigh ductility level. Sectional dimensions of square steel tube and the column height have significant influences on theeccentric compression behavior of the LCFST-H columns. The calculation formula of unidirectional bearing capacity ofLCFST-H column under eccentric compression is given in combination with relevant specifications. The calculation resultsof formula and results of finite element are consistent with each other.
Keywords:L-shaped column composed of concrete-filled square steel tube; H-shaped steel; eccentric compressionexperiment; parametric analysis; bearing capacity calculation
∗國家重點研發(fā)計劃資助項目(2017YFC0703802).
第一作者:閆翔宇,博士,高級工程師,一級注冊結(jié)構(gòu)工程師,主要從事鋼結(jié)構(gòu)、空間結(jié)構(gòu)和組合結(jié)構(gòu)等領(lǐng)域的技術(shù)研發(fā),Email:xy_yan2005@ 163. com.
[引用本文] 閆翔宇,張?zhí)熘?張希,等. H 型鋼連接 L 形方鋼管混凝土組合異形柱偏壓性能研究[ J]. 建筑結(jié)構(gòu),2023,53 ( 3): 64-71. YAN Xiangyu, ZHANG Tianzhu, ZHANG Xi, et al. Research on behavior of L-shaped columnscomposed of concrete-filled square steel tubes connected by H-shaped steel subjected to eccentric compression [ J].Building Structure,2023,53(3):64-71.
