人工模拟损坏的箍头榫接缝抗震性能实验研究

IF 1.7 4区 工程技术 Q3 ENGINEERING, CIVIL
Chengwei Peng, Wenlong Lv
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引用次数: 0

摘要

箍头榫卯是中国古代木结构中使用的一种传统木连接技术,其特点是榫卯互锁和箍头的抗拔作用。为了研究损坏的箍头榫卯连接的力学性能,本文探讨了各种参数的变化,包括损坏区域的大小、深度、位置和形状、柱轴向力以及木材类型。通过低周期重复加载试验分析了 17 个按比例制作的试样,包括完整和人为损坏的连接。试验结果表明,在由水曲柳和柚木制成的试样中,主要的损坏模式包括柱内侧梁榫的纵向拉伸开裂和柱外侧梁榫的垂直劈裂。与此相反,冷杉(Cunninghamia lanceolata)制成的试样没有明显的裂缝,但在梁柱交界处的边缘表现出明显的压缩变形。柱轴向力的增加会导致峰值弯矩增大,能量耗散能力增强,同时延展性降低。无论木材类型如何,总损坏程度的增加都会大大降低连接处的峰值弯矩、延展性和耗能能力。受损区域的位置和形状对接缝的峰值弯矩、延展性和消能能力有特定的影响。尽管如此,其基本模式并不容易辨别,并表现出一定程度的随机性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Experimental Study on Seismic Performance of Artificially Simulated Damaged Hoop Head Mortise–Tenon Joints

Experimental Study on Seismic Performance of Artificially Simulated Damaged Hoop Head Mortise–Tenon Joints

Hoop head mortise–tenon joint is a traditional wood connection technique used in ancient Chinese timber structures, characterized by the interlocking of mortise and tenon and the anti-extraction effect of the hoop head. In order to study the mechanical properties of damaged hoop head mortise–tenon joints, this paper explores variations in parameters, including the size, depth, location and shape of damaged areas, column axial force, and timber types. Seventeen scaled specimens, including both intact and artificially damaged joints, were analyzed through low-cyclic repeated loading tests. The results demonstrate that in the case of specimens crafted from Merbau and Tectona grandis, the primary damage modes entail longitudinal tensile cracking of the beam tenon on the inner side of the column and vertical splitting of the beam tenon on the outside of the column. In contrast, specimens made of Chinese fir (Cunninghamia lanceolata) were free of noticeable cracks but exhibited manifest compressive deformation at the edges of the beam-column junctions. An increase in the axial force of the column leads to higher peak bending moments and enhanced energy dissipation capacity while reducing ductility. Irrespective of timber type, heightened total damage degree substantially diminishes the peak bending moment, ductility, and energy dissipation capacity of the joints. The location and shape of the damaged area exert a specific influence on the peak bending moment, ductility, and energy dissipation capacity of the joints. Nonetheless, the underlying patterns are not readily discernible and exhibit a degree of randomness.

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来源期刊
CiteScore
3.30
自引率
11.80%
发文量
203
期刊介绍: The aim of the Iranian Journal of Science and Technology is to foster the growth of scientific research among Iranian engineers and scientists and to provide a medium by means of which the fruits of these researches may be brought to the attention of the world’s civil Engineering communities. This transaction focuses on all aspects of Civil Engineering and will accept the original research contributions (previously unpublished) from all areas of established engineering disciplines. The papers may be theoretical, experimental or both. The journal publishes original papers within the broad field of civil engineering which include, but are not limited to, the following: -Structural engineering- Earthquake engineering- Concrete engineering- Construction management- Steel structures- Engineering mechanics- Water resources engineering- Hydraulic engineering- Hydraulic structures- Environmental engineering- Soil mechanics- Foundation engineering- Geotechnical engineering- Transportation engineering- Surveying and geomatics.
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