Rotational behaviour of the Zuo-Dou joint in Taiwanese traditional Dieh-Dou timber construction and the efficiency of reversible reinforcement

Yu-hsiang Yeh, Tzu Chi Wang, Yin Chia Hsu

Research output: Contribution to conferencePaper

Abstract

This paper is mainly to assess the rotational behaviour of the beam-to-column joint, named Zuo-Dou, in Taiwanese traditional Dieh-Dou timber construction and to evaluate the structural efficiency of the feasible reinforcement for the Zuo-Dou joint. The appraisal is based on full-scale static test. The rotational stiffness and ultimate moment of Zuo-Dou in horizontal plane are appraised and the failure modes are analysed. The mechanical characteristics of Zuo-Dou are highly associated with the geometric profiles of the entire connection, particularly the depth of the mortice and the direction of the wooden fibre. While the depth of the channel over the join influences stiffness, the orientation of wooden fibre of Zuo-Dou itself determines the failure modes. Depending on the results from the first series of testing, various retrofitting strategies are figured out in order to enhance the critical structural deficit of Zuo-Dou joint. As demonstrated by former research, self-tapping screw (STS) is reliable fastener for not only modern timber construction but also the wooden cultural heritage. Different ways to apply STS to constrain the crack are taken into account in this study and then the second series of testing is intended for evaluating the structural retrofitting efficiency of STS. The testing demonstrates that STS can slightly improve the ultimate moment and considerably ensure the sufficient plastic deformation, which is a positive factor for the seismic behaviour of the connection. In the case of total failure of the original wooden dowels in the joints, STS contributes to remain the structural performance of the entire connections. The results demonstrate the adaptability of STS as retrofitting strategy.

Original languageEnglish
Publication statusPublished - 2018 Jan 1
Event2018 World Conference on Timber Engineering, WCTE 2018 - Seoul, Korea, Republic of
Duration: 2018 Aug 202018 Aug 23

Other

Other2018 World Conference on Timber Engineering, WCTE 2018
CountryKorea, Republic of
CitySeoul
Period18-08-2018-08-23

Fingerprint

screws
reinforcement
timber
stiffness
cultural heritage
plastic deformation
testing
fasteners
dowels
crack
retrofitting
fibre

All Science Journal Classification (ASJC) codes

  • Forestry
  • Plant Science

Cite this

Yeh, Y., Wang, T. C., & Hsu, Y. C. (2018). Rotational behaviour of the Zuo-Dou joint in Taiwanese traditional Dieh-Dou timber construction and the efficiency of reversible reinforcement. Paper presented at 2018 World Conference on Timber Engineering, WCTE 2018, Seoul, Korea, Republic of.
Yeh, Yu-hsiang ; Wang, Tzu Chi ; Hsu, Yin Chia. / Rotational behaviour of the Zuo-Dou joint in Taiwanese traditional Dieh-Dou timber construction and the efficiency of reversible reinforcement. Paper presented at 2018 World Conference on Timber Engineering, WCTE 2018, Seoul, Korea, Republic of.
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abstract = "This paper is mainly to assess the rotational behaviour of the beam-to-column joint, named Zuo-Dou, in Taiwanese traditional Dieh-Dou timber construction and to evaluate the structural efficiency of the feasible reinforcement for the Zuo-Dou joint. The appraisal is based on full-scale static test. The rotational stiffness and ultimate moment of Zuo-Dou in horizontal plane are appraised and the failure modes are analysed. The mechanical characteristics of Zuo-Dou are highly associated with the geometric profiles of the entire connection, particularly the depth of the mortice and the direction of the wooden fibre. While the depth of the channel over the join influences stiffness, the orientation of wooden fibre of Zuo-Dou itself determines the failure modes. Depending on the results from the first series of testing, various retrofitting strategies are figured out in order to enhance the critical structural deficit of Zuo-Dou joint. As demonstrated by former research, self-tapping screw (STS) is reliable fastener for not only modern timber construction but also the wooden cultural heritage. Different ways to apply STS to constrain the crack are taken into account in this study and then the second series of testing is intended for evaluating the structural retrofitting efficiency of STS. The testing demonstrates that STS can slightly improve the ultimate moment and considerably ensure the sufficient plastic deformation, which is a positive factor for the seismic behaviour of the connection. In the case of total failure of the original wooden dowels in the joints, STS contributes to remain the structural performance of the entire connections. The results demonstrate the adaptability of STS as retrofitting strategy.",
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Yeh, Y, Wang, TC & Hsu, YC 2018, 'Rotational behaviour of the Zuo-Dou joint in Taiwanese traditional Dieh-Dou timber construction and the efficiency of reversible reinforcement' Paper presented at 2018 World Conference on Timber Engineering, WCTE 2018, Seoul, Korea, Republic of, 18-08-20 - 18-08-23, .

Rotational behaviour of the Zuo-Dou joint in Taiwanese traditional Dieh-Dou timber construction and the efficiency of reversible reinforcement. / Yeh, Yu-hsiang; Wang, Tzu Chi; Hsu, Yin Chia.

2018. Paper presented at 2018 World Conference on Timber Engineering, WCTE 2018, Seoul, Korea, Republic of.

Research output: Contribution to conferencePaper

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AU - Wang, Tzu Chi

AU - Hsu, Yin Chia

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N2 - This paper is mainly to assess the rotational behaviour of the beam-to-column joint, named Zuo-Dou, in Taiwanese traditional Dieh-Dou timber construction and to evaluate the structural efficiency of the feasible reinforcement for the Zuo-Dou joint. The appraisal is based on full-scale static test. The rotational stiffness and ultimate moment of Zuo-Dou in horizontal plane are appraised and the failure modes are analysed. The mechanical characteristics of Zuo-Dou are highly associated with the geometric profiles of the entire connection, particularly the depth of the mortice and the direction of the wooden fibre. While the depth of the channel over the join influences stiffness, the orientation of wooden fibre of Zuo-Dou itself determines the failure modes. Depending on the results from the first series of testing, various retrofitting strategies are figured out in order to enhance the critical structural deficit of Zuo-Dou joint. As demonstrated by former research, self-tapping screw (STS) is reliable fastener for not only modern timber construction but also the wooden cultural heritage. Different ways to apply STS to constrain the crack are taken into account in this study and then the second series of testing is intended for evaluating the structural retrofitting efficiency of STS. The testing demonstrates that STS can slightly improve the ultimate moment and considerably ensure the sufficient plastic deformation, which is a positive factor for the seismic behaviour of the connection. In the case of total failure of the original wooden dowels in the joints, STS contributes to remain the structural performance of the entire connections. The results demonstrate the adaptability of STS as retrofitting strategy.

AB - This paper is mainly to assess the rotational behaviour of the beam-to-column joint, named Zuo-Dou, in Taiwanese traditional Dieh-Dou timber construction and to evaluate the structural efficiency of the feasible reinforcement for the Zuo-Dou joint. The appraisal is based on full-scale static test. The rotational stiffness and ultimate moment of Zuo-Dou in horizontal plane are appraised and the failure modes are analysed. The mechanical characteristics of Zuo-Dou are highly associated with the geometric profiles of the entire connection, particularly the depth of the mortice and the direction of the wooden fibre. While the depth of the channel over the join influences stiffness, the orientation of wooden fibre of Zuo-Dou itself determines the failure modes. Depending on the results from the first series of testing, various retrofitting strategies are figured out in order to enhance the critical structural deficit of Zuo-Dou joint. As demonstrated by former research, self-tapping screw (STS) is reliable fastener for not only modern timber construction but also the wooden cultural heritage. Different ways to apply STS to constrain the crack are taken into account in this study and then the second series of testing is intended for evaluating the structural retrofitting efficiency of STS. The testing demonstrates that STS can slightly improve the ultimate moment and considerably ensure the sufficient plastic deformation, which is a positive factor for the seismic behaviour of the connection. In the case of total failure of the original wooden dowels in the joints, STS contributes to remain the structural performance of the entire connections. The results demonstrate the adaptability of STS as retrofitting strategy.

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M3 - Paper

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Yeh Y, Wang TC, Hsu YC. Rotational behaviour of the Zuo-Dou joint in Taiwanese traditional Dieh-Dou timber construction and the efficiency of reversible reinforcement. 2018. Paper presented at 2018 World Conference on Timber Engineering, WCTE 2018, Seoul, Korea, Republic of.