Experimental study on the seismic mechanism of a full-scale traditional Chinese timber structure

The Panjian structure is an important longitudinal connecting member of Song Dynasty hall-type buildings in China. To study the lateral force resistance of such structures, a refined finite element model of Song-style hall-type single-room four-column space timber frame containing Panjian structure was established based on the official building code Yingzao Fashi of Song Dynasty. The Panjian and inner E’fang in the lower-ping part, the Panjian in the upper-ping part, and Guazi-gong Panjian and Man-gong Panjian in the roof ridge part were investigated. The model hysteresis curves of all three parts of the longitudinal timber frame were found to be S-shaped, with obvious pinching effect, fuller at both ends and centrosymmetric shape. The Panjian structures in the lower-ping and upper-ping parts, and the Guazi-gong Panjian in the roof ridge part increased the energy dissipation and lateral stiffness of the timber frame. The Man-gong Panjian in the roof ridge part, however, was detrimental to the lateral resistance of the structure. Throughout the test, the Panjian structures were relatively intact, with large plastic damage occurring at both ends of the E’fang. For the repair and testing of similar ancient buildings, some reference suggestions are provided.

Section: Introductionmentioning

confidence: 99%

Parameter analysis on longitudinal lateral force resistance of Song dynasty timber frame with Panjian

Chang

Dai

2023

“…According to the provisions of the modulus system in Engineering Practice Regulations of the Qing Dynasty, the Dou-Gong bracket is divided into 11 different grades according to the size, and each grade has different scale factors, which are applicable to buildings of different sizes. In the traditional wood structure test, the production cost of the full-scale model of Dou-Gong bracket is high (Chen et al 2018;Meng et al 2019). Only the measuring points with the measuring device can obtain the test results, and there are a lot of uncontrollable errors in the structural test, which has certain limitations.…”

Section: Introductionmentioning

confidence: 99%

Simulation Study on Static Characteristics of Qing-style ‘One Bucket Three Liters’ Column-cap Dou-Gong Bracket

Yao,

2023

The Dou-Gong bracket is a key transition component between the roof and the column in ancient Chinese wooden structures. In this paper, the static structural behavior of Qing-style ‘one bucket three liters’ Column-cap Dou-Gong Bracket (third-class material) full-scale test model was studied by simulation. The simulation of monotonic static loading was carried out in the vertical (Z-axis) direction, and the simulation of quasi-static loading under horizontal low-cycle reciprocating load was carried out in the horizontal direction (Y-axis, X-axis). The material of the simulation was P. sylvestris, and the setting of its material parameters referred to the results obtained from the material property tests. An anisotropic constitutive model suitable for the properties of wood materials was selected, and the elastoplasticity of wood in the simulation was defined by the Hill yield rule. The static structural behavior of the component in the Z-axis could be described by the variable stiffness linear elastic mechanical model. The static structural behavior of the component in the Y-axis and X-axis could be described by a multi-linear restoring force model. According to the simulation results, the key mechanical indexes of Dou-Gong bracket component in the Z, Y, and X axes were calculated from three aspects of strength, deformation, and energy.

“…To effectively simulate the seismic performance of mortisetenon joints, it is necessary to accurately evaluate the load-deformation hysteretic performance of the joints (Xie et al 2019). To achieve this evaluation, it is necessary to establish the hysteretic models of the mortise-tenon joints, where the existing hysteretic models of mortise-tenon joints can be divided into three categories, i.e., finite element (FE) models, physical models, and phenomenological models Meng et al 2019). The finite element models and physical models can effectively predict the hysteretic performance of mortise-tenon joints but are not suitable for the structural model with a large number of joints (Loss et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis on the mechanical properties of mortise-tenon joints in heritage timber buildings with and without a ‘Que-Ti’ component

Yao

Guo

et al. 2022

Three kinds of typical Chinese traditional mortise-tenon joints were tested. The effects of sparging on the deformation, hysteretic behavior, strength and stiffness degradation, and energy dissipation of the mortise-tenon joints were studied via low-cycle reversed loading tests with and without a ‘Que-Ti’ component. The results showed the following: the bearing capacity of the straight-tenon joint was the strongest, and the hysteretic loop of the through-tenon joint and half-tenon joint were asymmetric due to the asymmetry of the tenon form. The half-tenon joint was most likely to pull out the tenon, and the tenon pulling condition of the half-tenon joint can be effectively alleviated by adding a ‘Que-Ti’ component. From the perspective of energy consumption, it was found that the energy consumption capacity of the mortise-tenon joints after adding a ‘Que-Ti’ component was stronger than the joints without a ‘Que-Ti’ component. This shows that the ‘Que-Ti’ can be used as an effective component in terms of enhancing the mechanical properties of the mortise-tenon joints.