竹木材料的低温力学性能研究

陈景轩; 肖岩

doi:10.13204/j.gyjzG23032207

竹木材料的低温力学性能研究

doi: 10.13204/j.gyjzG23032207

陈景轩¹,
肖岩^1,2, ,

1. 浙江大学伊利诺伊大学厄巴纳香槟校区联合学院, 浙江海宁 314400;
2. 浙江大学(宁海)生物质材料与碳中和联合研究中心, 浙江宁海 315600

基金项目:

国家自然科学基金面上资助（51978606）。

详细信息

作者简介:
陈景轩,男,1998年出生,硕士,22071054@zju.edu.cn。

通讯作者:
肖岩,yanxiao@intl.zju.edu.cn。

计量
- 文章访问数: 114
- HTML全文浏览量: 28
- PDF下载量: 6
- 被引次数: 0
出版历程
- 收稿日期: 2023-03-22

Research on Mechanical Properties of Bamboo and Timber at Low Temperature

CHEN Jingxuan¹,
XIAO Yan^{1,2
, ,}

1. Zhejiang University-University of Illinois Joint Institute, Haining 314400, China;
2. ZJU-Ninghai Joint Research Center for Bio-Based Materials and Carbon Neutral Development, Ninghai 315600, China

摘要

摘要: 基于可持续发展的需要，建筑等领域中的竹木材料应用逐渐增加。为探究不同含水率的竹木材料在低温环境下应用潜力，主要研究了两种含水率（绝干状态、气干状态）的厚篾glubam工程竹和SPF规格材（云杉-松-冷杉）在低温环境下（-196~20℃）与经历冻融循环后的抗弯性能。通过静曲试验分别测量了两种材料在低温状态下与经过单次冻融循环后的弹性模量和抗弯强度，旨在为竹木材料在寒冷地区的结构设计提供依据。结果表明：厚篾glubam和SPF在低温环境下的力学强度变化规律较为复杂，但均表现出良好的抗弯性能，其中各组厚篾glubam在-50℃均出现峰值强度，较常温有明显强度提升。相比于含有一定水分的气干材，绝干材的性能变化幅度较小。
- 格鲁斑胶合竹(glubam) /
- 云杉-松-冷杉(SPF) /
- 低温抗弯弹性模量 /
- 低温抗弯强度
Abstract: The application of bamboo and wood materials in construction and other fields are gradually increasing corresponding to the requirements of sustainable development. To explore the potentials of bamboo and timber for various application environments at low temperatures, the bending performance of thick-strip glubam and SPF (spruce-pine-fir) with two moisture contents (oven-dried and air-dried) at conditions of low temperature (-196 to 20℃) and freeze-thaw cycle were examined. The elastic modulus and strength of rupture of glubam and SPF were measured respectively through static bending tests. The results showed that the variation of mechanical properties of thick-strip glubam and SPF at low temperatures was complicated, but both showed good bending performance. The peak strength of thick-strip glubam appearred at -50℃, which was higher than that at room temperature. Compared with air-dried materials, the strength variation amplitude of oven-dried materials was smaller.
- glubam /
- spruce-pine-fir (SPF) /
- low-temperature elastic modulus /
- low-temperature strength of rupture

HTML全文

参考文献(24)

[1]	中国建筑节能协会.中国建筑能耗研究报告2020[J]. 建筑节能(中英文), 2021, 49(2 ):1-6.
[2]	国家林业和草原局. 中国森林资源报告(2014-2018)[M]. 北京:中国林业出版社, 2019.
[3]	XIAO Y, YANG R Z, SHAN B. Production, environmental impact and mechanical properties of glubam[J]. Construction and Building Materials, 2013, 44:765-773.
[4]	肖岩, 单波. 现代竹结构[M]. 北京:中国建筑工业出版社, 2013.
[5]	XIAO Y. Engineered bamboo structures[M]. London:CRC Press of Taylor and Francis, 2022.
[6]	肖岩, 李佳. 现代竹结构的研究现状和展望[J]. 工业建筑, 2015, 45(4):1-6.
[7]	XIAO Y, CAI H, DONG S Y. A pilot study on cross-laminated bamboo and timber beams[J/OL]. Journal of Structural Engineering, 2021, 147(4)[2023-03-22]. https://doi.org/10.14021/j.cnki.hljqx.2022.03.009.
[8]	吴树森, 周学军, 王振, 等. 漠河极寒天气特征分析[J]. 黑龙江气象, 2022, 39(3):37-39 ,46.
[9]	赵玉洁, 常诚, 柏才音, 等. 漠河极端气温气候特征及其变化[J]. 气象, 2009, 35(3):94-98.
[10]	王元清, 奚望, 石永久. 钢轨钢材低温冲击功的试验研究[J]. 清华大学学报(自然科学版), 2007(9):1414-1417.
[11]	刘爽, 顾祥林, 黄庆华, 等. 超低温下钢筋单轴受拉时的应力-应变关系[J]. 同济大学学报(自然科学版), 2010, 38(7):954-960,968.
[12]	施士升. 冻融循环对混凝土力学性能的影响[J]. 土木工程学报, 1997(4):35-42.
[13]	江京辉, 于争争, 赵丽媛, 等. 低温环境下桦木顺纹抗压强度的研究[J]. 林业工程学报, 2017,2(4):30-33.
[14]	ZHAO L Y, JIANG J H, LU J X, et al. Flexural property of wood in low temperature environment[J]. Cold Regions Science and Technology, 2015, 116:65-69.
[15]	JIANG J H, LU J X, ZHOU Y D, et al. Compression strength and modulus of elasticity parallel to the grain of oak wood at ultra-low and high temperatures[J]. Bioresources, 2014, 9(2):3571-3579.
[16]	GAO S, WANG X P, WANG L H. Modeling temperature effect on dynamic modulus of elasticity of red pine (Pinus resinosa) in frozen and non-frozen states[J]. Holzforschung, 2015, 69(2):233-240.
[17]	SZMUTKU M B, CAMPEAN M, POROJAN M. Strength reduction of spruce wood through slow freezing[J]. European Journal of Wood and Wood Products, 2013, 71(2):205-210.
[18]	ZHAO L Y, LU J X, ZHOU Y D, et al. Effect of low temperature cyclic treatments on modulus of elasticity of birch wood[J]. BioResources, 2015, 10(2):2318-2327.
[19]	黄志伟, 关明杰. 深冷处理对竹层积材剪切强度及力学性能的影响[J]. 竹子研究汇刊, 2015, 34(3):39-42.
[20]	成俊卿. 木材学[M]. 北京:中国林业出版社, 1985.
[21]	CAETANO L, GROLLEAU V, GALPIN B, et al. High strain rate out-of-plane compression of birch plywood from ambient to cryogenic temperatures[J/OL]. Strain, 2018, 54(2)[2023-03-22]. https://doi.org/10.1111/str.12264.
[22]	赵丽媛. 低温作用对桦木力学性能影响及机理研究[D]. 北京:中国林业科学研究院, 2016.
[23]	AYRILMIS N, BUYUKSARI U, AS N. Bending strength and modulus of elasticity of wood-based panels at cold and moderate temperatures[J]. Cold Regions Science and Technology, 2010, 63(1):40-43.
[24]	ZHAO L Y, JIANG J H, LU J X. Effect of thermal expansion at low temperature on mechanical properties of Birch wood[J]. Cold Regions Science and Technology, 2016, 126:61-65.