Journal of South China University of Technology(Natural Science) >

2025 , Vol. 53 >Issue 2: 107 - 114

DOI: https://doi.org/10.12141/j.issn.1000-565X.240124

Architecture & Civil Engineering

Lateral Resistance Performance of Damaged Timber Frames with Two Reinforcement Methods

  • CAO Jixing ,
  • HAN Mengfan ,
  • BAO Chao ,
  • HE Haijie ,
  • LIU Yingyang
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  • 1.College of Civel Engineering and Architecture，Zhejiang University，Hangzhou 310058，Zhejiang，China
    2.School of Civil and Hydraulic Engineering，Ningxia University，Yinchuan 750021，Ningxia，China
    3.School of Architectural Engineering，Taizhou University，Taizhou 318000，Zhejiang，China
    4.School of Civil Engineering，Zhengzhou University，Zhengzhou 450001，Henan，China
曹纪兴（1991—），男，博士，研究员，主要从事木结构和健康监测研究。E-mail： cao.cee@outlook.com

Received date: 2024-03-14

  Online published: 2024-08-23

Supported by

the National Natural Science Foundation of China(52368044);the Key Research and Development Program of Ningxia(2021BEG03022);the Outstanding Youth Program Natural Science Foundation of Ningxia(2023AAC05015)

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Abstract

Fiber-reinforced polymer (FRP) reinforcement and self-tapping screw reinforcement are two commonly used methods for strengthening timber structures. Currently, research on reinforced glued laminated timber (glulam) structures primarily focuses on changes in strength after reinforcement, with relatively limited data on lateral resistance performance. Moreover, studies on reinforcing earthquake-damaged glulam frames are scarce. To investigate the lateral resistance performance of earthquake-damaged glued laminated timber (glulam) frames reinforced using different methods, two earthquake-damaged glulam frames were strengthened separately with carbon fiber-reinforced polymer (CFRP) and self-tapping screws, along with the addition of diagonal braces. The specimens were subjected to horizontal cyclic loading, and the experimental results were compared and analyzed. The test results indicate that both reinforcement methods effectively prevented the longitudinal splitting of the timber. However, compared to the specimen reinforced by self-tapping screw, the specimen reinforced by fiber-reinforced polymer shows significantly higher initial stiffness and peak load-carrying capacity, which can better suppress the development of cracks. The hysteretic curves of both frames exhibit a relatively anti “S” shape, with an obvious pinching effects. On the basis of the tests, simplified models of two frames were established using Open Sees. The models were calibrated based on experimental data. The hysteretic curves obtained from the calibrated models were in good agreement with the experimental results, verifying the accuracy and rationality of the model and laying the foundation for further parameter analysis. Furthermore, the influence of gravity loading for the specimens on the elastic stiffness and the maximum loading capacity was also investigated. It indicates that gravity load has an undeniable impact on the lateral resistance performance of timber frames, providing a scientific parameterized analysis for the seismic damage of reinforced timber frames.

Key words： damaged timber frame; fiber-reinforced polymer reinforcement; self-tapping screw reinforcement; hysteresis curve; parameter analysis

Cite this article

CAO Jixing , HAN Mengfan , BAO Chao , HE Haijie , LIU Yingyang . Lateral Resistance Performance of Damaged Timber Frames with Two Reinforcement Methods[J]. Journal of South China University of Technology(Natural Science), 2025 , 53(2) : 107 -114 . DOI: 10.12141/j.issn.1000-565X.240124

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