An estimation method of multi-bolted connections loaded perpendicular to the grain with fracture mechanics

在本项目中，我们将提出木材工程中垂直于木纹的多重螺栓连接荷载的估算方法。考虑到螺栓在连接中的布置，我们可以想象以下情况：多行中有斑点，一行中有几个螺栓，网格中有几个螺栓。然后对这些类型进行了载荷试验，并应用了我们以前的研究提出的新的强度估计方法。结果表明，该方法可用于估算垂直于颗粒加载的多个螺栓连接的裂纹萌生强度。

In this project, we would propose the estimation method of multiple bolted connection loaded perpendicular to the grain in timber engineering. Considering the arrangement of bolts in a joint, we could image the followings, with blots in multiple-row, with a few bolts in a row and with gridded ones. Then we conducted loading tests with those types and applied the new strength-estimation method proposed by our past study. As a result, we could confirm that the method is useful to estimatethe crack initiation strength of multiple bolted connections loaded perpendicular to the grain