CFRP布加固指接木梁的抗弯性能

doi:10.13438/j.cnki.jdzk.2023.03.006

吉首大学学报（自然科学版） ›› 2023, Vol. 44 ›› Issue (3): 39-45.DOI: 10.13438/j.cnki.jdzk.2023.03.006

CFRP布加固指接木梁的抗弯性能

王建省，贾玉梦，薛美慧

（1.北方工业大学土木工程学院，北京 100144；2.中国科学技术发展战略研究院，北京 100038）

出版日期:2023-05-25 发布日期:2023-06-16

Experimental Study on Flexural Behavior of Finger-Jointed Timber Beams Strengthened with CFRP Sheets

WANG Jianxing,JIA Yumeng,XUE Meihui

(1.School of Civil Engineering,North China University of Technology,Beijing 100144,China;2.Chinese Academy of Science and Technology for Development,Beijing 100038,China)

Online:2023-05-25 Published:2023-06-16
About author:WANG Jianxing (1964—),male,was born in Beijing City,professor of School of Civil Engineering,North University of Technology,mainly engaged in civil engineering,mechanical engineering.
Supported by:
2021 Undergraduate Course Ideological and Political Demonstration Course-Theoretical Mechanics (108051360022XN569);2022 Great Innovation Project-Frame Bridge Structural Engineering Research (108051360022XN388);National Natural Science Foundation of China (11572001,51478004)

摘要/Abstract

摘要：为了提高指接木梁的抗弯强度，设计制作了3组木梁，通过四点受压试验对比实木梁、指接木梁及CFRP加固指接木梁的抗弯性能，并分析指接节点对木梁断裂模式的影响，得到指接木梁位移荷载曲线和指接木梁加固位移荷载曲线.对各类型的破坏特点给出了相应的区分，验证了使用CFRP加固指接节点的可行性.试验结果表明，指接节点的出现对木材的弯曲破坏过程有明显影响.指接节点的出现使得木材的断裂模式由延性断裂转为脆性断裂，利用CFRP布加固可以显著提高指接木梁的抗弯强度.

关键词： 指接木梁, 断裂模式, 抗弯性能, CFRP加固

Abstract: In order to improve the flexural strength of finger-jointed timber beams,three groups of timber beams were designed and manufactured.Through four-point compression test,the flexural performance of solid timber beams,finger-jointed timber beams and CFRP reinforced finger-joint beams were compared,and the influence of finger-jointed joints on the fracture mode of timber beams was analyzed.The displacement load curve of finger-jointed timber beams and the displacement load curve of finger-jointed timber beams were obtained,and the corresponding distinction was given for the failure characteristics of each type.Therefore,the feasibility of using CFRP to reinforce finger-joint is proposed.The test results show that the appearance of finger-joint has obvious influence on the bending failure process of timber.The appearance of finger-joint makes the fracture mode of timber change from ductile fracture to brittle fracture,and the flexural strength of finger-joint timber beam is significantly improved by using CFRP cloth reinforcement.

Key words: finger joint timber beam, fracture mode, flexural behavior, CFRP reinforcement

王建省, 贾玉梦, 薛美慧. CFRP布加固指接木梁的抗弯性能[J]. 吉首大学学报（自然科学版）, 2023, 44(3): 39-45.

WANG Jianxing, JIA Yumeng, XUE Meihui. Experimental Study on Flexural Behavior of Finger-Jointed Timber Beams Strengthened with CFRP Sheets[J]. Journal of Jishou University(Natural Sciences Edition), 2023, 44(3): 39-45.

参考文献

[1] HAO Jincheng,LIU Jiaren,HE Lin,et al.Processing Conditions and Strength Properties of Finger Joint Materials[J].Forestry Science and Technology,1991(4):41-43.
[2] CAMPILHOR D S G,DE MOURA M F S F,BARRETO A M J P,et al.Experimental and Numerical Evaluation of Composite Repairs on Wood Beams Damaged by Cross-Graining[J].Construction and Building Materials,2009,24(4):531-537.
[3] BAKISC E,BANK LAWRENCE C,BROWN V L,et al.Fiber-Reinforced Polymer Composites for Construction—State-of-the-Art Review[J].Journal of Composites for Construction,2002,6(2):73-87.
[4] ZHAO Xiu,GUAN Shuai,MENG Xiangpeng,et al.Stress Wave Method for Evaluating the Bending Resistance of Structural Finger-Joint Materials[J].Forestry Machinery and Woodworking Equipment,2018,46(9):2729.DOI:10.13279/j.cnki.fmwe.2018.0098.
[5] FENG Jia,WANG Xueliang,XU Qiangang,et al.Experimental Study on Bending Resistance of Finger-Jointed Full-Size Laminated Timber Beams[J].Building Structure,2020,50(S1):252255.DOI:10.19701/j.zjg.2020.s1.049.
[6] HE Lin,WANG Cui,CUI Pengfei,et al.The Relationship Between the Position and Quantity of Finger Joint and Bending Strength[J].Forestry Science and Technology,1996,21(2):65;86.
[7] STEHR MICAEL.Laser Ablation of Machined Wood Surfaces.2.Effect on End-Grain Gluing of Pine (Pinus silvestris L.)[J].Holzforschung,1999,53(6):655-661.
[8] ZHOU Zhifang,BI Kexin,ZHANG Xuesong,et al.Effects of Section Size,Loading Mode and Finger Joint Form on Bending Resistance of Larch Large-Size Structure Finger Joint[J].Scientia Silvae Sinicae,2016,52(3):82-89.
[9] XUE Meihui,WANG Jianxing,WEI Changxi.Numerical Analysis of Finger-Point Beams Reinforced with CFRP Strips[J].Journal of Jishou University (Natural Science Edition),2018,39(4):48-53.
[10] SHEN Shijie,GU Jiyou,et al.Structural Laminated Timber[S].Beijing:China Architecture & Building Press,2011:6-29.
[11] Chongqing University,China Xinxing Baoxin Construction Corporation.Standard for Test Methods of Timber Structures[S].Beijing:China Architecture & Building Press,2012:6-20.

CFRP布加固指接木梁的抗弯性能

Experimental Study on Flexural Behavior of Finger-Jointed Timber Beams Strengthened with CFRP Sheets

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics

本文评价