複合応力下（曲げモーメント・せん断力・軸力）における大径ボルトを用いた木質ラーメン接合部に関する研究

摘要

本論では大径ボルトに関する接合部の部分実験、実大実験、有限rn要素法解析を行い、以下のような結論を得た。rn1）大径ボルトが引張力を受ける際、その最大耐力は木材のせん断耐rn力に概ね比例し、式（2）により最大引張耐力を安全側で推定するrnことができる。%This jointed system using specialized screws, called large diameter bolts, is one of the moment resisting joint systems. This system is characterized by cutting an internal thread directly to wood, by threading a large diameter bolt into the wood. In this study, the tensile behavior of these large diameter bolts embedded into the wood was evaluated through various tensile tests. Bending behavior of this jointed system was evaluated through two types of bending shear tests. FEM analysis had also done to know the distribution of shear stress of wood around the large diameter bolt. Then it was made clear that tensile strength was able to be estimated from the shear strength of the wood itself and the area around the large diameter bolt. Bending strength was also able to be estimated from tensile behavior.