Journal
JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES
Volume 34, Issue 2, Pages -Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)CF.1943-5509.0001390
Keywords
Ancient timber structures; One-way straight mortise-tenon (OWSMT); Seismic performance; Cyclic loading tests; Numerical modeling; Deterioration
Funding
- Science and Technology Project of Sichuan Province [2019YFG0048]
- Hunan Innovative Provincial Construction Project [2019RS3009]
- National Science Foundation of China [51778630, 51578478, 51878589, 51708485, 51708484]
- Natural Science Foundation of Jiangsu Province, PR China [BK20161337]
- China Postdoctoral Science Foundation [2015M581702, 2016M592695]
- 2018 Jiangsu Provincial Government Scholarship Program [228]
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Being exposed to weather directly or indirectly for more than 100 years, ancient timber buildings have experienced different levels of mechanical degradation. Especially the mortise-tenon joints, which play a crucial role in resisting various loads for these buildings, have suffered from severe deformations and damages, resulting in a significant reduction in the structural safety for the ancient timber buildings. In this study, a method is proposed to quantitatively describe the destruction of one-way straight mortise-tenon (OWSMT) joints, and the impact of joint damage on the seismic performance of the ancient timber structure was studied. The deterioration of the mortise-tenon joints was simulated by changing the size of the mortise, and controlling the width of the mortise compression zone and the gap between the tenon and the mortise. Low-cyclic loading tests were carried out on 23 groups of OWSMT joint specimens. The structural performance in terms of M-theta skeleton curves, stiffness degradation, and equivalent viscous damping of the OWSMT joints were obtained. Through the comparative analysis of the experimental and numerical simulation results, this paper further analyzes the seismic performance of the damaged timber joints.
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