短期荷载作用下钢-竹界面黏结应力和滑移分析

发布时间：2018-05-27 04:21

本文选题：钢-竹界面 + 单纯胶结型界面　；参考：《建筑结构学报》2015年10期

【摘要】：为研究钢-竹界面黏结应力与滑移分布,设计了两种类型的界面:型钢与竹板仅通过胶黏剂粘贴的单纯胶结型界面以及在胶黏剂粘贴基础上用螺钉加强的复合胶结型界面,并进行6个钢-竹组合试件的推出试验,得到黏结界面的剪切承载力及外贴竹板的应变。通过力学分析推导出外贴竹板正应力二阶微分方程,结合边界条件与数据拟合解得外贴竹板正应力表达式,并建立了钢-竹界面剪应力与相对滑移计算式,在此基础上提出了短期荷载作用下的钢-竹界面承载力计算方法。试验与理论分析结果表明:钢-竹界面剪切黏结性能良好,复合胶结型界面试件的破坏具有显著的延性特征;外贴竹板正应力试验值与拟合值吻合度高,以此为基础计算剪应力与相对滑移较为可靠;钢-竹界面剪应力与相对滑移分布具有两端大中间小的特征,且竹板受力端黏结界面的剪应力和滑移量明显大于黏结基体受力端黏结界面,剪应力最大值约为1.64 MPa;钢-竹界面剪切黏结承载力计算值与试验值吻合较好,其计算误差小于8%。
[Abstract]:In order to study the bond stress and slip distribution of the steel bamboo interface, two types of interfaces were designed: the simple cemented interface bonded by the adhesive by the adhesive and the composite cemented interface strengthened by the adhesive on the adhesive bonding, and the introduction test of 6 steel bamboo combinations was carried out, and the shear bearing capacity of the bonding interface was obtained. Through the mechanical analysis, the two order differential equation of Takesaka Masa stress is derived from the mechanical analysis, and the expression of the external Takesaka Masa stress is obtained by combining the boundary conditions and the data fitting, and the formula of the shear stress and relative slip of the steel bamboo interface is established. On this basis, the steel bamboo interface bearing load meter under the short-term load is put forward. The results of the test and theoretical analysis show that the shear bond behavior of the steel bamboo interface is good and the damage of the composite cemented interface specimen has significant ductility. The shear stress and the relative slip are more reliable, and the shear stress and relative slip of the steel bamboo interface are calculated. The shear stress and relative slip of the steel bamboo interface are calculated on the basis of the Takesaka Masa stress test. The shear stress and slip of the adhesive interface between the two ends of the bamboo plate are obviously larger than the bonding interface between the adhesive matrix and the bonding interface. The maximum shear stress is about 1.64 MPa, and the calculation value of the shear bond bearing capacity of the steel bamboo interface is in good agreement with the test value, and the calculation error is less than 8%..
【作者单位】：宁波大学建筑工程与环境学院;东北林业大学土木工程学院;
【基金】：国家自然科学基金项目(51378265)
【分类号】：TU398

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