Bending and Rolling Shear Properties of Cross-Laminated Timber Fabricated with Canadian Hemlock

Q2 Engineering

SDHM Structural Durability and Health Monitoring Pub Date : 2019-01-01 DOI:10.32604/sdhm.2019.04743

Gengmu Ruan, H. Xiong, Jiawei Chen

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引用次数: 8

Abstract

In this paper, bending performance and rolling shear properties of crosslaminated timber (CLT) panels made from Canadian hemlock were investigated by varied approaches. Firstly, three groups of bending tests of three-layer CLT panels with different spans were carried out. Different failure modes were obtained: bending failure, rolling shear failure, bonding line failure, local failure of the outer layer and mixed failure mode. Deflection and strain measurements were employed to calculate the global and local modulus of elastic (MOE), compared with the theoretical value. In addition, a modified compression shear testing method was introduced to evaluate the rolling shear strength and modulus, compared with the results from strain measurements in bending shear tests. According to testing results, bonding line failure and rolling shear failure were dominant failure modes in bending tests, and the theoretical value of bending property was beyond the average level of the calculating results obtained from both deflection and strain measurements. In addition, the rolling shear strength and modulus obtained from compression shear tests were relatively smaller than those from bending tests.

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加拿大铁杉复合材的弯曲和轧制剪切性能

本文采用不同的方法研究了加拿大铁杉复合材料(CLT)板的弯曲性能和轧制剪切性能。首先，对不同跨度的三层CLT板进行了三组弯曲试验。得到了不同的破坏模式:弯曲破坏、滚剪破坏、粘结线破坏、外层局部破坏和混合破坏模式。通过挠度和应变测量计算整体和局部弹性模量(MOE)，并与理论值进行比较。此外，还介绍了一种改进的压缩剪切试验方法，以评估轧制剪切强度和模量，并与弯曲剪切试验中的应变测量结果进行了比较。试验结果表明，粘结线破坏和滚剪破坏是弯曲试验的主要破坏模式，弯曲性能理论值超出了挠度和应变测量计算结果的平均水平。压剪试验得到的滚剪强度和模量相对小于弯曲试验得到的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

SDHM Structural Durability and Health Monitoring Engineering-Building and Construction

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： In order to maintain a reasonable cost for large scale structures such as airframes, offshore structures, nuclear plants etc., it is generally accepted that improved methods for structural integrity and durability assessment are required. Structural Health Monitoring (SHM) had emerged as an active area of research for fatigue life and damage accumulation prognostics. This is important for design and maintains of new and ageing structures.