CFRPで強ィ匕した集微才の力学特性に関する実験的研究

摘要

一般的な集成材と比べて3倍の曲げ剛性と曲げ強度を持つ高強度 AFRW (炭素繊維強化集成材）を開発し，曲げ試験，せん断試験，めり込み試験を行った結果，以下のことが分かった。1)AFRWの等価曲げヤング率は22.1kN/mm2,等価曲げ強度は 85.6N/mm~2であり，集成材と比べて，それぞれ3.02倍，3.69倍と大変大きな曲げ性能を持つ部材の開発に成功した。%We developed advanced fiber reinforced wood (AFRW) and conducted bending, shearing and bearing test of AFRW, taken into account for water hanging treatment. From the results, we found the following; Equivalent bending Young's modulus of AFRW was 22.1 N/mm~2, equivalent bending strength was 85.6 N/mm~2, and AFRW had extremely large bending performance of 3.02 times and 3.69 times compared with glued laminated timbers. The shear strength of AFRW was 5.05 N/mm~2 on average and 3.62 NI mm2 at 95%lower limit value, which was sufficiently large as 1.34 times as compared with the shear standard strength of Sugi glued laminated timber. We also proposed a method for estimating the shear stress to be peeled off the interface between CFRP and timber. The bearing strength of AFRW was 14.7N/mm~2 on average and 12.5N/mm~2 at 95%lower limit value, which is about twice as large as the bearing standard strength, compared with the reference strength for Sugi glued laminated timber.