Quantifying the effect of profile design on flexural stiffness in cellular cross-laminated timber: a numerical exploration and experimental verification

IF 3.4 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Materials and Structures Pub Date : 2024-08-14 DOI:10.1617/s11527-024-02432-9

Suman Pradhan, Mostafa Mohammadabadi, Daniel Seale

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Abstract

The utilization of engineered wood products is becoming more and more important when it comes to carbon sequestration and sustainable building. Among them, Cross-laminated timber (CLT) has emerged as a popular mass timber product, offering enhanced structural properties and environmental benefits. This study investigates the potential of incorporating small-diameter trees as corrugated wood-strand composite panels into CLT, developing a cellular cross-laminated timber (CCLT). A systematic investigation was carried out to assess the impact of core geometry on the flexural stiffness of CCLT panels utilizing the finite element method. Six cases involving combinations of fixed and variable geometrical parameters were examined to determine the effect of each geometrical parameter. The findings revealed a substantial positive effect of corrugation depth, while bond length and unit cell length exhibited a negative influence on bending stiffness. Other geometric characteristics play a minor, supportive role. Considering the insights derived from the parametric study and considering manufacturing constraints, a corrugated geometry was designed and fabricated using an aluminum matched-die mold. The CCLT panels, constructed using these corrugated panels, were evaluated against predictions from a finite element model, demonstrating close agreement. Moreover, the CCLT exhibited a higher value of normalized modulus of elasticity by density compared to conventional CLT.

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量化剖面设计对蜂窝状交叉层压木材抗弯刚度的影响：数值探索与实验验证

在碳封存和可持续建筑方面，工程木产品的使用正变得越来越重要。其中，交叉层压材（CLT）已成为一种流行的大宗木材产品，具有更强的结构特性和环境效益。本研究探讨了将小直径树木作为波纹木线复合板纳入 CLT 的潜力，从而开发出一种蜂窝交叉层压木材（CCLT）。我们利用有限元方法进行了系统调查，以评估芯材几何形状对 CCLT 面板抗弯刚度的影响。对涉及固定和可变几何参数组合的六个案例进行了研究，以确定每个几何参数的影响。研究结果表明，波纹深度对弯曲刚度有很大的正向影响，而粘接长度和单元格长度则对弯曲刚度有负面影响。其他几何特征的影响较小。根据参数研究得出的结论，并考虑到制造方面的限制，我们设计了一种波纹几何形状，并使用铝制匹配模具进行制造。根据有限元模型的预测结果，对使用这些波纹板制造的 CCLT 面板进行了评估，结果显示两者非常接近。此外，与传统的 CLT 相比，CCLT 按密度计算的归一化弹性模量值更高。

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

Materials and Structures 工程技术-材料科学：综合

CiteScore

6.40

自引率

7.90%

发文量

222

审稿时长

5.9 months

期刊介绍： Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.