宋式二级燕尾榫特殊结构的力学性能分析

Analysis of Special Structure of Song-Style Second Grade Dovetail Tenon

为了更好地分析燕尾榫结构的力学性能,建立了二折线多参数力学结构,并进行了适用于木结构的力学分析试验.然后,根据力学平衡与变形协调关系公式,提出了燕尾榫节点计算公式.研究结果表明,燕尾榫的变形主要集中在榫头与卯口的接触处,当单向载荷变大时,其弯矩也变大,容易对接触面造成损伤.荷载-位移曲线和极限荷载-竖向荷载曲线显示,当竖向荷载增加时,极限荷载也随之增加;当极限载荷达到屈服临界点时,位移的增加量变小并趋于平稳.

To better analyze the mechanical properties of the dovetail tenon structure,a twofold line multi-parametric mechanical structure was established,and a mechanical analysis test suitable for wooden structures was carried out.Then,the corresponding dovetail joints were proposed based on the mechanical balance and a deformation coordination relationship formula.The above research results show that the deformation of the dovetail tenon is mainly concentrated around the contact between the tenon and mouth.When the unidirectional load becomes larger,its bending moment also becomes larger,which is easy to cause damage to the contact surface.The load-displacement curve and the ultimate load-vertical load curve obtained through the test also show that when the vertical load increases,the ultimate load also increases;when the ultimate load reaches the yield critical point,the increase in displacement becomes smaller and tends to be smooth.