论文部分内容阅读
本文对木材胶合指形接头的受拉工作进行了深入的研究,指出指形接头只有当受净截面抗拉强度控制时,才能充分利用其承载能力,因此应选用平缓的指边坡度以防沿胶缝剪坏;减小指端宽度非但能增大指接受力面积,并使指端缺口旁的应力集中得到缓和. 作者采用有限元法的定指端梯形缺口间应力不均匀分布系数和指接的传力效能,所求得的数据与试验结果甚为相近. 作者利用有限元法求得传力效能,采用正交设计方法导得指接传力效能的计算公式,从而使能根据结构的要求设计出所需传力效能的指形接头. 在理论分析和试验研究的基础上,提出了指形接头的两个系列.
In this paper, an in-depth study on the tensile work of wood glued finger joints was conducted. It was pointed out that the finger joints can only fully utilize their load carrying capacity when controlled by the net cross-section tensile strength. Therefore, gentle finger slopes should be used to prevent Collar shearing; reducing the width of the finger not only increases the area of the finger receiving force, but also eases the stress concentration beside the finger notch. The authors use the finite element method to determine the coefficient of uneven distribution of the trapezoidal notch stress between the fingers. With the force transfer performance, the obtained data are very similar to the test results. The authors use the finite element method to obtain the force transfer efficiency, and use the orthogonal design method to derive the calculation formula of the finger transfer force efficiency, thus enabling the structure The requirements are to design the finger joints that require the force transfer performance. Based on theoretical analysis and experimental research, two series of finger joints are proposed.