Precise Finite Element Analysis of Full-Scale Straight-Tenon Joints in Ancient Timber Buildings

• Published in: International journal of architectural heritage 2023-07, Vol.17 (7), p.1137-1152
• Main Authors: Xue, Jianyang, Song, Dejun, Wu, Chenwei
• Format: Article
• Language: English
• Subjects: Constitutive relationship; effective friction coefficient; full-scale straight-tenon joints; parameter analysis; precise finite element analysis; seismic behavior
• ISSN: 1558-3058; 1558-3066
• DOI: 10.1080/15583058.2021.2017073

In order to study the seismic performance of full-scale straight-tenon joint, a precise finite element analysis has been conducted based on the orthotropic constitutive relationship of wood and a modified Coulomb friction model. The hysteretic and skeleton curve, stiffness degradation, energy dissipation capacity, deformation capacity, and stress distribution are obtained through the finite element model and test results are utilized for calibration. Besides, parameter analyses considering size effect, friction coefficients, material properties, and axial loads on the column are performed. Results demonstrate that the precise finite element model can well reflect the seismic behavior of the straight-tenon joints. The hysteretic curves in simulation and test results are both anti-"Z" types with an obvious pinching effect. The initial stiffness is large, and stiffness degrades obviously with the increment of rotation. At the same rotation, the larger the scale of the model is, the greater moments and stiffness of the joints are, but the relationship is not linear. Friction coefficients and compressive strength in the parallel-to-grain direction mainly influence flexural capacity of the joint but have little effect on rotational stiffness. The rotational stiffness and flexural capacity are slightly affected by elastic moduli and axial loads.