Journal of Jishou University(Natural Sciences Edition) ›› 2023, Vol. 44 ›› Issue (3): 39-45.DOI: 10.13438/j.cnki.jdzk.2023.03.006

• Architectural Engineering • Previous Articles     Next Articles

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

WANG Jianxing,JIA Yumeng,XUE Meihui   

  1. (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)

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

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