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(湖南大學(xué)土木工程學(xué)院鋼結(jié)構(gòu)研究所,長沙 410082)
摘要: 為研究芯管交錯排布的不銹鋼芯板樓板受豎向荷載作用下的彎曲性能與剪切性能,對五個不同尺寸的不銹鋼芯板單向板足尺試件以及一個跨中布置內(nèi)隔板的不銹鋼芯板雙向板足尺試件進(jìn)行試驗研究與有限元模擬,對比兩者結(jié)果驗證了有限元模型的準(zhǔn)確性,在此基礎(chǔ)上對不銹鋼芯板樓板的受力機(jī)理及彎曲剛度和剪切剛度進(jìn)行分析,最后對不銹鋼芯板樓板性能進(jìn)行參數(shù)分析.試驗及分析結(jié)果表明:不銹鋼芯板樓板具有良好的靜力學(xué)性能;不銹鋼芯板樓板的變形以剪切變形為主,抗剪強(qiáng)度遠(yuǎn)小于抗彎強(qiáng)度;不銹鋼芯板樓板的受力機(jī)理類似于空間空腹網(wǎng)架結(jié)構(gòu),相鄰芯管之間面板的中點處可以近似認(rèn)為面板僅有剪力和軸力而無彎矩,并提出了芯板單元的簡化受力模型;芯管交錯排布的不銹鋼芯板樓板彎曲性能可以認(rèn)為是正交各向同性的,剪切性能是正交各向異性的;面板厚度是影響剪切剛度的最主要因素;布置隔板可以有效提高不銹鋼芯板樓板的承載力且降低撓度.
關(guān)鍵詞: 不銹鋼芯板;夾層板結(jié)構(gòu);芯管交錯排布;三點彎曲試驗;受力機(jī)理;有限元分析
中圖分類號:TU398.2,TU317.1 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2022)18-0099-09
DOI:10.19701 / j.jzjg.20201000
Mechanical principle analysis on stainless steel core plate floor with staggered arranged core tubes
SHU Xingping,HUANG Yiheng
(Steel Structural Institute of Civil Engineering College,Hunan University,Changsha 410082,China)
Abstract: In order to study the bending performance and shear performance of stainless steel core plate floor with staggeredarranged core tubes under vertical load,five unidirectional plates of stainless steel core plate full-scale specimens and abidirectional plate of stainless steel core plate full-scale specimen with a clapboard in the middle were tested and finiteelement simulation was carried out. Comparison of the two results verifies the accuracy of the finite element model. On thisbasis,mechanical principle and the bending stiffness and shear stiffness of the stainless steel core plate floor were analyzed,finally the influence of different parameters on the performance of the stainless steel core plate floor was analyzed. The testand analysis results show that stainless steel core plate floor has good static performance. The deformation of the stainlesssteel core plate floor is mainly shear deformation and the shear strength is much smaller than the bending strength. Themechanical mechanism of the stainless steel core plate floor is similar to the space truss structure,at the midpoint of thepanels between adjacent core tubes,the panels are considered to have only shear and axial forces. A simplified stress modelof the core plate unit was proposed. The shear stiffness of the stainless steel core plate is much smaller than the bendingstiffness. The bending performance of the stainless steel core plate with staggered arranged core tubes is isotropic and theshear performance is orthotropic. The thickness of the panel is the most important factor affecting the shear stiffness. Thearrangement of the partition plate can effectively improve the bearing capacity of the stainless steel core plate floor andreduce the deflection.
Keywords:stainless steel core plate;sandwich plate structure;staggered arranged core tube;three-point bending test;mechanical principle;finite element analysis
∗國家自然科學(xué)基金項目(51778219).
第一作者:舒興平,博士,教授,博士生導(dǎo)師,主要從事鋼結(jié)構(gòu)研究,Email:hulget@ 163. com.
[引用本文]舒興平,黃毅恒. 芯管交錯排布不銹鋼芯板樓板受力機(jī)理分析[ J]. 建筑結(jié)構(gòu),2022,52(18):99-107.SHU Xingping,HUANG Yiheng. Mechanical principle analysis on stainless steel core plate floor with staggered arrangedcore tubes[J]. Building Structure,2022,52(18):99-107.
