从图中可以看出，直榫节点的弯矩转角曲线在整个受力过程分为弹性受力阶段和

It can be seen from the figure that the bending moment and corner curve of the straight tenon joint is divided into two stages in the entire force process: the elastic force stage and the plastic development stage. The descending sawtooth section of the bending moment angle curve is due to the segmented loading process. When the specified loading displacement is reached, the loading stops will continue. At this time, the deformation of the wooden beam will continue to increase, and partial unloading will occur, which appears as a descending sawtooth section of the curve, but the outer contour of the moment corner curve is still continuous.

从图中可以看出，直榫节点的弯矩转角曲线在整个受力过程分为弹性受力阶段和塑性发展阶段两个阶段，弯矩转角曲线的下降锯齿段是由于分段加载过程中，当达到规定的加载位移时，停止继续加载，这时候木枋的变形会继续增加，而出现局部卸载的情况，从而表现为曲线的下降锯齿段，但弯矩转角曲线外围轮廓依然是连续的。

It can be seen from the figure that the bending moment angle curve of straight tenon joint can be divided into elastic stress stage and plastic development stage in the whole stress process. The descending zigzag section of bending moment angle curve is due to the stop of loading when the specified loading displacement is reached. At this time, the deformation of timber beam will continue to increase and local unloading will occur Now it is the descending zigzag section of the curve, but the outer contour of the moment rotation curve is still continuous.<br>