發(fā)布時(shí)間：2018-03-14 06:07

  本文選題：木-混組合梁　切入點(diǎn)：槽口釘類連接件　出處：《世界橋梁》2016年06期 　論文類型：期刊論文

【摘要】：為計(jì)算釘桿彎曲破壞機(jī)理下槽口釘類連接件抗剪承載力,提出木-混組合梁槽口釘類連接件抗剪承載力計(jì)算方法。參照依據(jù)新西蘭標(biāo)準(zhǔn)和歐洲規(guī)范的槽口螺釘連接件抗剪承載力計(jì)算方法——NZS法、修正折減參數(shù)η*的EC*法,針對混凝土剪切破壞和釘類彎曲變形造成連接失效的破壞機(jī)理,采用銷釘連接件抗剪承載力計(jì)算式替代2種方法中螺釘抗拔承載力,得到考慮釘桿彎曲破壞的NZS法、EC*法,用以計(jì)算槽口釘類連接件抗剪承載力。以9組木-混組合梁推出試件為例,采用這2種方法計(jì)算試件的槽口栓釘連接件抗剪承載力,并與試驗(yàn)值對比。結(jié)果表明,2種方法均未考慮槽口深度對木-混組合梁槽口釘類連接件抗剪承載力的影響;相較于考慮釘桿彎曲破壞的EC*法,考慮釘桿彎曲破壞的NZS法的計(jì)算值與試驗(yàn)值吻合更好,能夠較好地計(jì)算槽口釘類連接件釘桿彎曲破壞時(shí)的抗剪承載力。
[Abstract]:In order to calculate the shear capacity of slot nail connectors under the bending failure mechanism of nail rod, This paper presents a calculation method for shear bearing capacity of slot screw connectors of wood-mixed composite beams. According to the calculation method of shear capacity of slot screw connectors based on New Zealand standard and European code, the EC* method of reducing parameter 畏 * is revised according to the method of NZS. In view of the failure mechanism of joint caused by shear failure of concrete and buckling deformation of nail type, this paper uses the calculation formula of shear bearing capacity of pin joint to replace the pull-out bearing capacity of screw in two methods, and obtains the NZS method and EC* method which takes into account the bending failure of nail rod. It is used to calculate the shear bearing capacity of slot nail connectors. Taking 9 groups of wood-mixed composite beams as an example, the shear bearing capacity of the slotted pin joints of the specimens is calculated by using these two methods. The results show that the effect of notch depth on shear bearing capacity of notched nail joints in wood-concrete composite beams is not taken into account in both methods, and compared with EC* method which considers the bending failure of nail rods, the results show that the two methods do not take into account the effect of notch depth on shear capacity of notched nail connectors of wood-concrete composite beams. The calculated value of NZS method considering the bending failure of nail rod is in good agreement with the experimental value, and the shear bearing capacity of the nail rod can be calculated well.
【作者單位】： 中南林業(yè)科技大學(xué)土木工程與力學(xué)學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目“現(xiàn)代木-混凝土組合結(jié)構(gòu)橋梁設(shè)計(jì)理論及應(yīng)用基礎(chǔ)研究”(51478485)
【分類號(hào)】：U441

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本文編號(hào)：1609942