Analytical Approach for Load-Carrying Capacity Evaluation of Tibetan Timber Beam-column Joint

ABSTRACT

Queti is an important component of Tibetan timber beam-column joint to transfer compression, shear, and bending moment from one structural component to another. The inclination of Queti is a common type of damage in Tibetan heritage buildings and it significantly reduces the load-carrying capacity and safety of the joint under vertical load. In this paper, an analytical model of the joint with Queti-inclination is proposed to predict the yield and ultimate loads of the joint and the corresponding failure modes. Laboratory tests have been conducted on typical Tibetan beam-column joints to verify the proposed model. A parametric study is also conducted on the effects of material property, Queti width and height, as well as the dowel height on the load-carrying capacity of the joint. Results obtained show that a weaker material property will significantly reduce the capacity of the joint. An increase in Queti width and dowel height have an ameliorative effect on the yield and ultimate loads, while the Queti height has the opposite effect.

KEYWORDS:

• Analytical model
• failure mode
• load-carrying capacity
• Queti-inclination
• Tibetan timber beam-column joint

Acknowledgments

The comments from Prof. S.S. Law and his help in polishing the English usage of this paper are also acknowledged.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The work described in this paper was financially supported by the Hainan Provincial Natural Science Foundation of China (520QN230), Beijing Natural Science Foundation of China (8151003), National Key Research and Development Project (2019YFD1101003), National Natural Science Foundation of China (51778045, 52068019), the 111 Project of China (B13002), and Science Foundation of Hainan University [KYQD(ZR)1975].