Effects of dowels on the mechanical properties of wooden composite beams in ancient timber structures

Han, Xiaoli; Dai, Jian; Qian, Wei; Zhaoyang, Zhu; Li, Baolong

doi:10.15376/biores.16.4.6891-6909

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…The quasi-static test of wooden column was conducted at the Engineering Structure Experiment Center of the Beijing University of Technology (Beijing, China). [13] The loading method of this test was selected according to JGJ/T 101 (2015) [14]. Cyclic loading was controlled by displacement.…”

Section: Methodsmentioning

confidence: 99%

Study on Seismic Performance of Wooden Column in Ancient Buildings under Secondary Loading

Han¹,

Dai²,

Qian³

et al. 2022

J. Phys.: Conf. Ser.

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In order to provide some scientific references for the restoration of ancient timber buildings, the wooden column was subjected to a secondary load through the quasi-static test. The seismic performance parameters of wooden column such as the damage of the wooden column, P-Δ hysteretic curve, P-Δ skeleton curve and stiffness degradation were analyzed. The test results showed that the wooden column could still maintain the lateral resistance capacity after the secondary load under the action of low reversed cyclic load. The hysteretic curve of the wooden column had a certain degree of a pinch effect, which indicated that the semi-rigid characteristic of the wooden column was reserved after the secondary loading. The lateral stiffness of the wooden column after the secondary load decreases with the increased of the lateral displacement. The lateral stiffness decreases with the increase of displacement. It showed that the wooden column still had good seismic behavior after secondary load.

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Section: Methodsmentioning

confidence: 99%

Study on Seismic Performance of Wooden Column in Ancient Buildings under Secondary Loading

Han¹,

Dai²,

Qian³

et al. 2022

J. Phys.: Conf. Ser.

Self Cite

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“…The results indicated that the tensile performance of mortise and tenon joints was the worst when considering the interaction of four different factors. Han [15] et al designed ve types of larch wood composite beam specimens for static load experiments to investigate the effects of the number and location of tenons on the mechanical properties of wood structural stacked beams. The results showed that tenons can improve the exural load capacity of wooden composite beams, and uniform distribution reduces the sliding effect.…”

Section: Introductionmentioning

confidence: 99%

Comparing and evaluating realistic wood structure models derived from multi-source remote sensing data: A focus on suitability reinforcement

Shi,

Guo,

Liang

et al. 2024

Preprint

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Exploring the comparison and evaluation of wood structure realistic model based on the fusion of multi-source remote sensing data and suitability reinforcement effects, aiming to proactively and accurately prevent potential structural issues to ensure long-term effective preservation of historical buildings. Various point cloud data from different sources were collected using equipment such as unmanned aerial vehicle (UAV) and LiDAR; Based on the point cloud data, a hybrid realistic model was established, using the existing point cloud data to successfully restore the orientation angle of the mortise and tenon interface, the angle was determined to further enhance the real reflection of the existing shape of the column-architrave structure, which provides a more accurate analysis of the structural analysis of the stress model; Based on the establishment of a realistic model, precise identification of weak locations was carried out and two different types of reinforcement were designed. A comparative analysis of the effectiveness of these two types of reinforcement was carried out to determine the most suitable reinforcement scheme applicable to the weakened area. The results show that by performing finite element analysis on the 24 columns in the realistic model, the columns with weak areas—M2W23 columns, were found to present the largest deformation of 4.65 mm in the upper and middle parts of the columns. Of the two reinforcement types, the reinforcement with aluminum alloy material reduced the deformation of the wooden columns from 4.65 mm to 3.5 mm, and after being reinforced, the deformation of the wooden columns was reduced by about 24.7% compared to that before the reinforcement. In comparison, the deformation of the wooden columns was reduced from 4.65 mm to 2.8 mm after reinforcement with different thicknesses of CFRP (Carbon Fiber Reinforced Plastic) sheet, which is a 39.7% reduction relative to the unreinforced condition, showing better stability. Reinforcement with different thicknesses of CFRP sheets provides flexibility to cope with the unequal damage of the wooden columns, thus ensuring an equal distribution of strength throughout the columns. The results indicate that within this structure, different thicknesses of CFRP sheets reinforcement exhibit more suitable performance.

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“…Wu et al (2020) established a stacked beam containing Pupai fang using the Yingxian wooden pagoda of the Liao dynasty as a reference prototype, and obtained parameters such as hysteresis curves by means of a proposed static lateral resistance test method and proposed a simplified load-displacement model with three-line segments. Han et al (2021) investigated the effect of the number and position of nails on the bending moment, slip, deflection, and ultimate load carrying capacity of Qing dynasty stacked purlins by means of a three-point bending test method. Sun et al (2020) used a stacked purlin in a Qing dynasty ridge part as a model and measured the moment-angle hysteresis curve through a proposed static test to analyse the force-deformation characteristics and damage modes of the node.…”

Section: Introductionmentioning

confidence: 99%

Parametric analysis on the lateral force resistance of Qing Dynasty timber frame containing stacked purlins

Chang

Dai

2023

BioRes

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In ancient wooden structures of the Qing dynasty in China, stacked purlins are important longitudinal elements. In this study, a refined finite element model of a four-column timber frame containing stacked purlins was built. The effects of the fangs, spacer boards, and purlins with dovetail ends on the lateral resistance of the timber frame and the mid-span vertical deflection of the purlins were studied. The longitudinal hysteresis curve of the timber frame made up of stacked purlins was found to be S-shaped, centrally symmetrical, with a pinching effect and full at both ends. The Fangs made the greatest improvement on the lateral stiffness, displacement ductility, and total hysteresis energy consumption of the timber frame by reducing the mid-span vertical deflection of the purlins. The spacer boards contributed less to the lateral resistance of the timber frame than Fangs, but they contributed most to the reduction of the mid-span vertical deflection of the purlins. The dovetail connection at the ends of the purlins had a limited effect on reducing the lateral stiffness and ductility of the timber frame and increasing the mid-span vertical deflection of the purlins, but they significantly increased the total energy consumption of the timber frame and its energy consumption capacity.

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Effects of dowels on the mechanical properties of wooden composite beams in ancient timber structures

Cited by 4 publications

References 15 publications

Study on Seismic Performance of Wooden Column in Ancient Buildings under Secondary Loading

Study on Seismic Performance of Wooden Column in Ancient Buildings under Secondary Loading

Comparing and evaluating realistic wood structure models derived from multi-source remote sensing data: A focus on suitability reinforcement

Parametric analysis on the lateral force resistance of Qing Dynasty timber frame containing stacked purlins

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