Research trends in hybrid cross-laminated timber (Clt) to enhance the rolling shear strength of clt1 kor app

被引：7

作者：

Yang S.M. ^{[1
]}

Lee H.H. ^{[2
]}

Kang S.G. ^{[1
]}

机构：

[1] Department of bio-based materials, College of Agriculture & Life Science, Chung nam national University, Daejeon

[2] The korean woodism-city Project Research Council, Daejeon

来源：

Journal of the Korean Wood Science and Technology | 2021年 / 49卷 / 04期

关键词：

Cross laminated timber; Hybrid cross laminated timber; Lamina; Mid-layer angle; Rolling shear strength; Structural wood based materials;

D O I：

10.5658/WOOD.2021.49.4.336

中图分类号：

学科分类号：

摘要：

In this study, hybrid CLT research and development trends were analyzed to improve the low rolling shear strength of CLT, a large wooden panel used in high-rise wooden buildings. Through this, basic data that can be used in research and development directions for localization of CLT were prepared. As a way to improve the low rolling shear strength, the use of hardwood lamina, the change of the lamina arrangement angle, and the use of structural composite materials are mainly used. Rolling shear strength and shear modulus of hardwood lamina are more than twice as high as softwood lamina. It confirmed that hardwoods can be used and unused species can be used. Rolling shear strength 1.5 times, shear modulus 8.3 times, bending stiffness 4.1 times improved according to the change of the layer arrangement angle, and the CLT strength was confirmed by reducing the layer arrangement angle. Structural wood-based materials have been improved by up to 1.35 times MOR, 1.5 times MOE, and 1.59 times rolling shear strength when used as laminas. Block shear strength between the layer materials was also secured by 7.0 N/mm2,which is the standard for block shear strength. Through the results of previous studies, it was confirmed that the strength performance was improved when a structural wood based materials having a flexural performance of MOE 7.0 GPa and MOR 40.0 MPa or more was used. This was determined based on the strength of layered materials in structural wood-based materials. The optimal method for improving rolling shear strength is judged to be the most advantageous application of structural wood based materials with strength values according to existing specifications. However, additional research is needed on the orientation of CLT lamina arrangement according to the fiber arrangement of structural wood-based materials, and the block shear strength between lamina materials. © 2021, Korean Society of Wood Science Technology. All rights reserved.

引用

页码：336 / 359

页数：23

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