Evaluation of Bonding Shear Strength of Cross-Laminated Timber Fabricated with Domestic Larch

Ying-chun GONG; Hai-qing REN; Qing-feng DING

doi:10.12326/j.2096-9694.2020077

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Evaluation of Bonding Shear Strength of Cross-Laminated Timber Fabricated with Domestic Larch
1.Research Institute of Wood Industry，Chinese Academy of Forestry，Beijing 100091，China
2.Suzhou Crownhomes Co.，Ltd.，Suzhou 215100，Jiangsu，China
Vol. 35, Issue 2, Pages: 49-53(2021)
DOI： 10.12326/j.2096-9694.2020077

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龚迎春,任海青,丁青锋.国产落叶松正交胶合木胶层剪切强度评价[J].木材科学与技术,2021,35(02):49-53.

GONG Ying-chun,REN Hai-qing,DING Qing-feng.Evaluation of Bonding Shear Strength of Cross-Laminated Timber Fabricated with Domestic Larch[J].Chinese Journal of Wood Science and Technology,2021,35(02):49-53.
龚迎春,任海青,丁青锋.国产落叶松正交胶合木胶层剪切强度评价[J].木材科学与技术,2021,35(02):49-53. DOI： 10.12326/j.2096-9694.2020077.

GONG Ying-chun,REN Hai-qing,DING Qing-feng.Evaluation of Bonding Shear Strength of Cross-Laminated Timber Fabricated with Domestic Larch[J].Chinese Journal of Wood Science and Technology,2021,35(02):49-53. DOI： 10.12326/j.2096-9694.2020077.

摘要

正交胶合木（Cross-laminated timber，CLT）胶层剪切强度是其胶合质量评价的重要指标。依据层板模量（8~12 GPa为低、12~16 GPa为中、16 GPa以上为高）、层数（3、5层）、层板厚度（15、25 mm）、组坯方向（正交和45°）共设置6种组坯方式，按照LY/T 3039—2018《正交胶合木》测试CLT板胶层剪切强度。研究结果表明：胶层剪切的破坏模式主要有沿着木材表面发生锯齿状剪切破坏和沿着横向层层板年轮方向剪切破坏；加载速率对胶层剪切强度影响不显著；除层板厚度对CLT板胶层剪切强度影响不显著外，表层层板模量、层板层数、组坯方向对CLT板胶层剪切强度存在显著性影响。

Abstract

The bonding shear strength of cross laminated timber (CLT) is an important index to evaluate the bonding quality of CLT. There were six kinds of layup methods including the modulus of outer laminate(＞8~＜12 GPa (low), ≥12~≤16 GPa (middle), and＞16 GPa (high), the number of layers (three layers and five layers), the thickness of timber (15 mm and 25 mm), and layup directions (orthogonal and inclined 45 degrees). Based on LY/T 3039—2018, the bonding shear strength of CLT plate was tested. The results showed that the main failure modes were serrated shear failure along the wood surface and shear failure along the annual ring of transverse direction of the laminate. The loading rate had no significant effect on the bonding shear strength of CLT. The MOE of outer laminate, the laminate number, and the direction of layup had significant effects on the bonding shear strength of CLT plate, except that the laminate thickness.

关键词

正交胶合木胶层剪切强度落叶松破坏模式组坯结构缝隙宽度

Keywords

cross-laminated timberbonding shear strengthLarix kaempferi (Lamb.) Carr.failure modeslay-up structuregap width

references

龚迎春, 任海青. 正交胶合木的特性及发展前景[J].世界林业研究, 2016, 29(3): 71-74.

GONG Y C, REN H Q. Characteristics and development prospect of cross-laminated timber[J].World Forestry Research, 2016, 29(3): 71-74.

王志强, 罗冬, 郑维, 等. 混合结构对正交胶合木剪力墙抗侧性能的影响[J].林业工程学报, 2017, 2(2): 145-151.

WANG Z Q, LUO D, ZHENG W, et al. Effect of hybrid structure on lateral load resistance of cross-laminated timber shear wall[J].Journal of Forestry Engineering, 2017, 2(2): 145-151.

王志强, 付红梅, 罗欢, 等. 速生杨木横向层正交胶合木滚动剪切性能[J].南京工业大学学报(自然科学版), 2016, 38(5): 116-120.

WANG Z Q, FU H M, LUO H, et al. Planar shear properties of fast-growing poplar in hybrid cross laminated lumber[J].Journal of Nanjing Tech University (Natural Science Edition), 2016, 38(5): 116-120.

龚迎春. 国产日本落叶松正交胶合木制备工艺及力学性能评价[D].北京: 中国林业科学研究院, 2017.

GU M Z, PANG W C. Rolling shear strengths of southern pine cross laminated timber[J].Wood Design Focus, 2014(26): 25-33.

Ringhofer A, Brandner R, Schickhofer G. Withdrawal resistance of self-tapping screws in unidirectional and orthogonal layered timber products[J].Materials and Structures, 2015, 48(5): 1435-1447.

吕雯蓉, 曹龙, 王思群, 等. 正交胶合木(CLT)防火性能的研究[J].西南林业大学学报(自然科学), 2018, 38(5): 191-199.

LÜ W R, CAO L, WANG S Q, et al. Review on fire-resistant performance of cross-laminated timber (CLT)[J].Journal of Southwest Forestry University (Natural Sciences), 2018, 38(5): 191-199.

Betti M, Brunetti M, Lauriola M P, et al. Comparison of newly proposed test methods to evaluate the bonding quality of Cross-Laminated Timber (CLT) panels by means of experimental data and finite element (FE) analysis[J].Construction and Building Materials, 2016, 125: 952-963.

熊海贝, 欧阳禄, 吴颖. 国外高层木结构研究综述[J].同济大学学报(自然科学版), 2016, 44(9): 1297-1306.

XIONG H B, OUYANG L, WU Y. State-of-the-art research of tall wood buildings[J].Journal of Tongji University (Natural Science), 2016, 44(9): 1297-1306.

Knorz M, Torno S, van de Kuilen J W. Bonding quality of industrially produced cross-laminated timber (CLT) as determined in delamination tests[J].Construction and Building Materials, 2017, 133: 219-225.

GONG Y C, WU G F, REN H Q. Block shear strength and delamination of cross-laminated timber fabricated with Japanese larch[J].BioResources, 2016, 11(4): 10240-10250.

Stehr M, Johansson I. Weak boundary layers on wood surfaces[J].Journal of Adhesion Science and Technology, 2000, 14(10): 1211-1224.

WANG Z Q, GONG M, CHUI Y H. Mechanical properties of laminated strand lumber and hybrid cross-laminated timber[J].Construction and Building Materials, 2015, 101: 622-627.

Karacabeyli E, Douglas B. CLT handbook: cross-laminated timber [M]. Canada: FPInnovations and American Wood Council, 2013.

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