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胶合植筋技术是一种新型的木结构连接技术,具有承载力高、刚度大、美观且防火效果好等优点,已被成功应用于木结构建筑及桥梁领域。木结构植筋与混凝土植筋类似,涉及到3种材料、2个界面,木材-植筋之间的粘结属多重介质间的粘结问题。木结构植筋节点是否具备良好的结构性能,除了各材料的基本性能有保证外,另外就是界面是否具备良好的粘结性能。该文基于三折线粘结-滑移关系模型,推导了植筋应力、界面粘结应力及相对滑移沿锚固长度分布的解析解,并与试验结果对比,结果表明,理论值与试验值吻合良好。通过实测加载过程中植筋内部的应变及加载端植筋与木材之间的相对滑移,研究了植筋-木材之间的粘结应力及相对滑移沿锚固长度的分布规律,最终建立了考虑位置函数的胶合木植筋粘结滑移关系。
Glued planting technology is a new type of wood structure connection technology, with high bearing capacity, stiffness, beautiful and good fire effect, etc., has been successfully used in the field of wood structures and bridges. Similar to the planting of steel bar and concrete embedding tendons, involving three kinds of materials, two interfaces, wood - planting bar between the bond between multiple media is the issue of bonding. Whether the wood-planting node has good structural properties, in addition to the basic performance of the material is guaranteed, the other is whether the interface has good bonding properties. Based on the model of the bond-slip relationship in the tri-fold line, the analytic solution of the anchorage stress, the interfacial bond stress and the relative slip along the anchorage length distribution are deduced and compared with the experimental results. The results show that the theoretical values agree well with the experimental values good. Through the measurement of the internal strain in the anchorage bar and the relative slip between the anchorage bar and the wood during the loading process, the distribution of anchorage stress and relative slip along the anchorage length was studied. Finally, Adhesion and slippage of glulam anchorage with consideration of position function.