Load-carrying capacity analysis of traditional Chinese Dou-gong joints under monotonic vertical and reversal lateral loading. (December 2021)

• Record Type: Journal Article
• Authors: Cao, Jixing; Zhao, Yang; Liu, Yingyang; Lu, Hongyi; Wang, Wenhua
• Is Part Of: Journal of building engineering. Volume 44(2021)
• Publication Date: 2021-12
• Subjects: Dou-gong joint -- Mechanical properties -- Force-displacement curves -- Uncertainty quantification; Building -- Periodicals; 690.05
• DOI: 10.1016/j.jobe.2021.102847
• Languages: English
• ISSNs: 2352-7102

Abstract

Abstract: The Dou-gong joint is a key element in traditional Chinese timber structures. This work presents the mechanical properties of Dou-gong joints based on experimental investigations and numerical analyses. Six full-scale joints were tested under vertical monotonic loading and horizontal reversed cyclic loading. Typical features, including the failure modes, maximum load-carrying capacity, deterioration in stiffness and strength, and energy dissipation, are reported and compared. The results indicate that a Dou-gong joint has exceptional deformability and good energy dissipation capacity. The load-carrying capacity performs well under vertical loading, while it is poor under horizontal loading. The Bayesian model is constructed to predict the force-displacement curves based on the test data, in which the uncertainty of the model parameters is quantified from the posterior distribution. The posterior estimation of the parameters provides insight into the uncertainty assessment of the Dou-gong joint and provides useful information for reliability analysis. Highlights: Failure modes of Dou-gong joint under different loading conditions. Monotonous and hysteretic properties of joint investigation. Mathematical model for force-displacement curve and uncertainty estimation.