具有相邻间隙的松动榫卯连接力学行为研究

IF 2.2 4区 工程技术 Q2 ENGINEERING, CIVIL Structural Engineering and Mechanics Pub Date : 2021-01-01 DOI:10.12989/SEM.2021.77.4.509
Jun-xiao He, Juan Wang, Qin Yang, Miao Han, Y. Deng
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引用次数: 1

摘要

传统木结构的榫卯节点存在相邻缝隙,导致节点结构的复杂性,影响了节点的力学性能。本文通过数值模拟研究了松动接头的变形状态、应力分布和承载能力,并通过全尺寸试验对其进行了验证。在试验和数值结果的基础上,提出了一个带间隙的简化力学模型来表示松动接头的弯曲能力。此外,还研究了榫头高度、摩擦系数、弹性模量和轴向载荷对榫头间隙效应和参数的影响。结果表明,计算得到的松动节点弯矩与转角之间的关系与数值结果吻合较好,验证了模型的有效性;随着间隙的增大,松动节点的弯曲承载力和转动刚度有一定的下降;在重复荷载作用下,榫头高度可能是影响节点力学行为的最重要因素;研究结果可为现有榫卯节点的状态评估提供重要参考。
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Study on mechanical behaviors of loose mortise-tenon joint with neighbouring gap
The neighbouring gaps at the mortise-tenon joint in traditional timber structure, which leads to the complexity of the joint, are considered to impair the mechanical performance of the joint. In this paper, numerical simulation of loose joint was conducted to examine the deformation states, stress distributions, and bearing capacities, which was verified by full-scale test. On the basis of the experimental and numerical results, a simplified mechanics model with gaps has been proposed to present the bending capacity of the loose joint. Besides, the gap effects and parameter studies on the influences of tenon height, friction coefficient, elastic modulus and axial load were also investigated. As a result, the estimated relationship between moment and rotation angle of loose joint showed the agreement with the numerical results, demonstrating validity of the proposed model; The bending bearing capacity and rotational stiffness of loose joint had a certain drop with the increasing of gaps; and the tenon height may be the most important factor affecting the mechanical behaviors of the joint when it is subjected to repeated load; Research results can provide important references on the condition assessments of the existing mortise-tenon joint.
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来源期刊
Structural Engineering and Mechanics
Structural Engineering and Mechanics 工程技术-工程:机械
CiteScore
3.80
自引率
18.20%
发文量
0
审稿时长
11 months
期刊介绍: The STRUCTURAL ENGINEERING AND MECHANICS, An International Journal, aims at: providing a major publication channel for structural engineering, wider distribution at more affordable subscription rates; faster reviewing and publication for manuscripts submitted; and a broad scope for wider participation. The main subject of the Journal is structural engineering concerned with aspects of mechanics. Areas covered by the Journal include: - Structural Mechanics - Design of Civil, Building and Mechanical Structures - Structural Optimization and Controls - Structural Safety and Reliability - New Structural Materials and Applications - Effects of Wind, Earthquake and Wave Loadings on Structures - Fluid-Structure and Soil-Structure Interactions - AI Application and Expert Systems in Structural Engineering. Submission of papers from practicing engineers is particularly encouraged.
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