An experimental study of utilization for large-scale wood structure using glulam from Shinshu in which it aimed at forestry reproduce

本研究以日本信州落叶松集成材为研究对象，进行了弯曲试验、蠕变试验等试验研究，得出了一些认识。主要研究结果如下：1.对600cm和800cm高度的大型集成材进行了弯曲试验。结果表明，尺寸效应小于一般尺寸效应。2.在长野县四个地点进行了蠕变试验。不同部位的蠕变行为不同。特别是它是重要的是在一天中的温度和湿度的变化值。3.利用传统的木节点，提出了柱梁连接节点和联轴节节点，并进行了性能试验。关于柱与梁的连接，采用了“Nuki”、粘结剂和螺栓连接。4.在连接节点方面，作为抗弯节点，能够得到合理的结果。根据他们的研究结果，我们再次确认了仅使用集成材就可以建造大型建筑物。5.我们发现集成材用于广告牌后十年，目的是调查集成材的强度和杨氏模量的劣化。通过剥离外层来更新表面的颜色。剥离外层后试样的杨氏模量与剥离前相同。

In this study, some tests that were used large scale glulam from Shinshu larch were done for example bending test, creep test and so on. Then some knowledge was gotten. The findings are following as ;1.The bending tests of large scale glulam (they were 600cm and 800cm height.) were found size effect less than general ones. And estimating model was able to calculate the bending strengths.2.The creep experiments were tested at the four places in Nagano prefecture. Their creep behaviors were difference at the each place. Especially it was important that was changing values in temperature and humidity in a day. But they didn't show size effect.3.The column to beam connections and the coupling joints were proposed using the traditional wooden joint and they were tested for finding property. About column to beam connections, it was used the "Nuki", the adhesive and the bolts joint. As a result, we got good stiffness and toughness.4.About coupling joints, they were able to get reasonable result as moment resistant joint. As their results, we reconfirmed to be able to build large scale building using only glulam.5.We found the glulam used post of signboard for ten years in which it was aimed investigating about the deterioration of strength and Young's modulus of glulam. The color of surface was renewed by peeling off the outside layer. And the Young's modules of specimen after peeling off the outside layer was as same as before peeling.