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<p>This study provides experimental evidence supporting the preservation of historic wooden buildings by examining the mechanical behavior of Tou-Kung joints under vertical loads, particularly focusing on the influence of the structure. Uniaxial tests were conducted on three Ang configurations of Tou-Kung joints to generate stress-strain curves and identify failure modes. The results show that the Ang structure is key to the mechanical properties of Tou-Kung joints. Under vertical loading, the Xia-Ang structure demonstrated superior initial stiffness, yield strength and peak strength, whereas the Shang-Ang structure exhibited the lowest initial stiffness values. The vertical stiffness initially increases before decreasing due to the gap at the Lu-Tou joint. The tilt angle of the Ang component significantly affects the load transmission path and the load-bearing capacity of the Lu-Tou joint. A comparison of different Ang structures reveals that yield, peak and ultimate strengths decrease while ductility increases as the tilt angle increases.</p>

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Experimental study on vertical collapse mechanism of Ang structures in historic Chinese wooden buildings

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年8月19日

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  • Kai Wang,
  • Danping Hao,
  • Biao Zhou,
  • Xavier Romão,
  • Hideki Yoshioka,
  • Wei Wang,
  • Zhengyang Wang,
  • Yubing Gao,
  • Sihan Fu,
  • Dong Wang

摘要

This study provides experimental evidence supporting the preservation of historic wooden buildings by examining the mechanical behavior of Tou-Kung joints under vertical loads, particularly focusing on the influence of the structure. Uniaxial tests were conducted on three Ang configurations of Tou-Kung joints to generate stress-strain curves and identify failure modes. The results show that the Ang structure is key to the mechanical properties of Tou-Kung joints. Under vertical loading, the Xia-Ang structure demonstrated superior initial stiffness, yield strength and peak strength, whereas the Shang-Ang structure exhibited the lowest initial stiffness values. The vertical stiffness initially increases before decreasing due to the gap at the Lu-Tou joint. The tilt angle of the Ang component significantly affects the load transmission path and the load-bearing capacity of the Lu-Tou joint. A comparison of different Ang structures reveals that yield, peak and ultimate strengths decrease while ductility increases as the tilt angle increases.