Experimental research on mechanical performance of damaged bracket set joints

Chen Jiuzhang; Chen Xueyao; Dai Lu

doi:10.12171/j.1000-1522.20190278

Journal of Beijing Forestry University > 2020 > 42(2): 149-158. > DOI: 10.12171/j.1000-1522.20190278

Chen Jiuzhang, Chen Xueyao, Dai Lu. Experimental research on mechanical performance of damaged bracket set joints[J]. Journal of Beijing Forestry University, 2020, 42(2): 149-158. DOI: 10.12171/j.1000-1522.20190278

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Experimental research on mechanical performance of damaged bracket set joints

School of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China

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Received Date: July 02, 2019
Revised Date: July 28, 2019
Available Online: October 27, 2019
Published Date: March 02, 2020

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Abstract

ObjectiveThe bracket set is an important component of the wooden structure in Chinese ancient architecture system, which plays a vital role in maintaining the mechanical properties of the whole structure reliable. There are different degrees of damage of bracket set joints in existing ancient structures. While at present, most of the researches on the mechanical properties of bracket set joints are based on intact bracket sets, and little consideration is given to the mechanical properties and deformation rule of damaged bracket sets, especially under the condition of decaying and volume loss caused by worm moths. Therefore, it is of great practical significance to study the effect of damage on the mechanical properties of bracket set joints or even the whole structure, which can also help provide scientific basis for the repair and protection of ancient timber structures.
MethodThis research took a typical second-story bucket arch on columns in supporting platform of Yingxian Wooden Tower, Shanxi Province of the northern China as the object, and made four groups of bracket set models with the 1/3.5 scale. One group of model kept in perfect condition, while the remaining three groups were drilled with holes in different positions artificially to weaken the stress-bearing section of components of the bracket set joints, so as to simulate the real damage to them. By adopting the vertical loading test, the load-displacement curves of four groups of bracket set joints were obtained, and the mechanical characteristics and deformation performances of bracket set joints were clarified combining the test result.
ResultThe test result and data analysis showed that under certain vertical loads, the failure of bracket joints was mainly reflected in the fracture, bending deformation of the second-story Hua-Gong and cracks on the connection block. The failure mode of damaged bracket set joints was similar to that of the intact one. While pre-drilled groups sufferred from worse damage as their ultimate load and stiffness decreased, and the negative effect caused by the former damage was more obvious on the stiffness of bracket set joints.
ConclusionWhen the damage type is the same and the overall damage condition of the structure is similar, the damage on the first story of a bracket set joint would exert greater influence on stiffness, which means it is easier to deform when bearing vertical loads.
- ancient timber architectures,
- bracket,
- damage,
- vertical loading,
- load-displacement curve

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[1]	吕璇. 古建筑木结构斗栱节点力学性能研究[D]. 北京: 北京交通大学, 2010. Lü X. Mechanical behavior of bucket arches in Chinese ancient timber buildings[D]. Beijing: Beijing Jiaotong University, 2010.
[2]	Feio A O, Lourenco P B, Machado J S. Testing and modelling of a traditional timber mortise and tenon joint[J]. Materials and Structures, 2014, 47(1−2): 213−225. doi: 10.1617/s11527-013-0056-y
[3]	谢启芳, 郑培君, 向伟, 等. 残损古建筑木结构单向直榫榫卯节点抗震性能试验研究[J]. 建筑结构学报, 2014, 35(11):143−150. Xie Q F, Zheng P J, Xiang W, et al. Experimental study on seismic behaviour of damaged straight mortise-tenon joints of ancient timber buildings[J]. Journal of Building Structures, 2014, 35(11): 143−150.
[4]	马栋. 应县木塔二层残损调查与受力分析[D]. 西安: 西安建筑科技大学, 2010. Ma D. The damage survey on the second floor of Yingxian Wooden Tower[D]. Xi’an: Xi’an University of Architecture and Technology, 2010.
[5]	王智华. 应县木塔斗栱调查与力学性能分析[D]. 西安: 西安建筑科技大学, 2010. Wang Z H. Dougong investigation and mechanics property analysis on Yingxian Wooden Tower[D]. Xi’an: Xi’an University of Architecture and Technology, 2010.
[6]	陈韦. 应县木塔斗栱力学性能及简化分析模型的研究[D]. 扬州: 扬州大学, 2010. Chen W. Research on mechanical property and simplified analysis model of Dougong of Yingxian Wooden Tower[D]. Yangzhou: Yangzhou University, 2010.
[7]	王珏. 应县木塔扭、倾变形张拉复位的数字化模拟和安全性评价[D]. 扬州: 扬州大学, 2008. Wang J. The numerical simulation and security appraisal of tensioning-replacement method for torsional and inclined deformation of Yingxian Wooden Tower[D]. Yangzhou: Yangzhou University, 2008.
[8]	谢启芳, 张利朋, 向伟, 等. 竖向荷载作用下叉柱造式斗栱节点受力性能试验研究与有限元分析[J]. 建筑结构学报, 2018, 39(9):66−70. Xie Q F, Zhang L P, Xiang W, et al. Experimental study and finite element analysis of Dou Gong joints built with fork column under vertical loading[J]. Journal of Building Structures, 2018, 39(9): 66−70.
[9]	Xue J Y, Xu D, Xia H L. Experimental study on seismic performance of through-tenon joints with looseness in ancient timber structures[J]. Advances in Structural Engineering, 2018, 22(6): 1312−1328.
[10]	王雪亮, 张帆, 李瑞政, 等. 加速腐朽环境下木构件的强度退化时变模型[J]. 武汉理工大学学报, 2015, 37(6):76−80. Wang X L, Zhang F, Li R Z, et al. Strength degradation model of wood components under accelerated decay environment[J]. Journal of Wuhan University of Technology, 2015, 37(6): 76−80.
[11]	King W S, Yen J Y, Yen Y N. Joint characteristics of traditional Chinese wooden frames[J]. Engineering Structure, 1996, 18(8): 635−644. doi: 10.1016/0141-0296(96)00203-9
[12]	马炳坚. 中国古建筑木作营造技术[M]. 北京: 北京科学出版社, 1991. Ma B J. Construction technology of Chinese ancient architecture woodwork[M]. Beijing: Beijing Science Press, 1991.
[13]	侯卫东. 应县木塔保护研究[M]. 北京: 文物出版社, 2016: 82−87. Hou W D. Study on the protection of the Yingxian Wooden Tower[M]. Beijing: Cultural Relics Press, 2016: 82−87.
[14]	李铁英, 秦慧敏. 应县木塔现状结构残损分析及修缮探讨[J]. 工程力学, 2005, 22(增刊1):199−212. Li T Y, Qin H M. Structural analysis and repair of Yingxian Wooden Tower[J]. Engineering Mechanics, 2005, 22(Suppl.1): 199−212.
[15]	李诫. 营造法式[M]. 北京: 商务印书馆, 1954. Li J. Building formulas[M]. Beijing: Commercial Press, 1954.

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