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Shear modulus analysis of cross-laminated timber using picture frame tests and finite element simulations

机译：使用图像框架测试和有限元模拟交叉层压木材的剪切模量分析

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摘要

Determining the mechanical properties of cross-laminated timber (CLT) panels is an important issue. A property that is particularly important for CLT used as shear walls in buildings is the in-plane shear modulus. In this study, a method to determine the in-plane shear modulus of 3- and 5-layer CLT panels was developed based on picture frame tests and a correction factor evaluated from finite element simulations. The picture frame test is a biaxial test where a panel is simultaneously compressed and tensioned. Two different testing methods are simulated by finite elements: theoretical pure shear models as a reference cases and picture frame models to simulate the picture frame test setup. An equation for calculating the shear modulus from the measured shear stiffnesses in the picture frame tests is developed by comparisons between tests and finite element simulations of the CLT panels. The results show that pure shear conditions are achieved in the central region of the panels. No influence from the size of the tested panels is observed in the finite element simulations.
机译：确定交叉层压木材（CLT）面板的机械性能是一个重要问题。对于在建筑物中用作剪力墙的CLT特别重要的属性是面内剪切模量。在该研究中，基于从有限元模拟评估的图像帧测试和从有限元模拟评估的校正因子，开发了一种确定3-和5层CLT面板的面内剪切模量的方法。相框测试是双轴测试，其中一个面板同时压缩和张紧。通过有限元模拟两种不同的测试方法：理论纯剪切模型作为参考情况和图像框架模型，以模拟画框测试设置。通过CLT面板的测试和有限元模拟之间的比较，开发了用于计算图像框架测试中测量剪切刚度的剪切模量的等式。结果表明，纯剪切条件在面板的中心区域实现。在有限元模拟中观察到从测试面板的大小的影响。

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  • 来源
    《Materials and structures》 |2020年第4期|112.1-112.9|共9页
  • 作者

    Jonas Turesson; Sven Berg; Anders Bjornfot; Mats Ekevad;

  • 作者单位

    Department of Engineering Sciences and Mathematics Division of Wood Science and Engineering Skelleftea Campus Lulea University of Technology Forskargatan 1 SE-931 77 Skelleftea Sweden;

    Department of Engineering Sciences and Mathematics Division of Wood Science and Engineering Skelleftea Campus Lulea University of Technology Forskargatan 1 SE-931 77 Skelleftea Sweden;

    Section for Building and Civil Engineering Centre for Bachelor of Engineering Studies Lautrupvang 15 2750 Ballerup Denmark;

    Department of Engineering Sciences and Mathematics Division of Wood Science and Engineering Skelleftea Campus Lulea University of Technology Forskargatan 1 SE-931 77 Skelleftea Sweden;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    In-plane shear stiffness; Picture frame method; CLT; Shear modulus; Finite elements;

    机译：面内剪切刚度;画框方法;CLT;剪切模量;有限元;

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