不同埋置深度对热阻断拉结件抗剪性能影响研究

Study on the Influence of Different Embedding Depth on Shear Performance of Thermal Blocking Tie Parts

对埋置深度为25 mm,35 mm,40 mm的热阻断拉结件夹心保温墙板进行双剪试验,分析其破坏形态,荷载-位移曲线及荷载-应变曲线,研究不同埋置深度对热阻断拉结件抗剪性能的影响规律。试验研究表明:埋深为35 mm时拉结件极限抗剪承载力最大,达到150 kN,分别是埋置深度40 mm和25 mm的1.07倍和1.81倍;拉结件埋深增加量<5 mm时,试件抗剪承载力易受制作误差影响,试件抗剪承载力无明显提升。拉结件埋深对拉结件抗剪承载力影响较大,抗剪强度随埋深的增加而增加,此研究结果可为实际工程提供理论指导。

Double shear tests were carried out on sandwich thermal insulation wall panels with embedded depths of 25 mm,35 mm and 40 mm to analyze their failure modes,load-displacement curves and load-strain curves,and to study the influence of different embedded depths on the shear performance of thermal blocking tensile parts.The experimental results show that the ultimate shear strength reaches 150 kN when the buried depth is 35 mm,which is 1.07 times and 1.81 times of the buried depth of 40 mm and 25 mm respectively.When the increase of buried depth is less than 5 mm,the shear bearing capacity of specimens is easily affected by manufacturing error,and the shear bearing capacity of specimens does not increase significantly.The buried depth has a great influence on the shear capacity,and the shear strength increases with the increase of buried depth,the research results can provide theoretical guidance for practical engineering.