Study on the rotational performance of steel hub joints of wood reticulated domes subjected to monotonic bending moment

IF 2.4 3区 农林科学 Q1 FORESTRY
Shi-Guang Li, Xiao-Ting Wang, Hong-Liang Qian, Shuang Niu
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Abstract

Steel hub joints featuring the End-Bearing and the Bolted-Connections in the wood members (EBBC joints) have been widely adopted in wood reticulated domes. Yet, few studies have been conducted on their mechanical behaviour. This paper presents a refined finite model for EBBC joints, which is verified against existing test results and used for further parametric study on the rotational performance of EBBC joints subjected to monotonic bending moment. The flexural stiffness and capacity of joints about the strong and weak axes are investigated, accounting for influences from axial compression and the number of shear bolts. The results indicate that the joints demonstrate typical elastoplastic behaviour. Higher compression force and more shear bolts can enhance rotational stiffness and the ultimate moment of the joint while decreasing the ductility due to the earlier failure of wood within the bearing region of the joint. Conclusions are drawn regarding the feature and failure mechanism of the EBBC joints, which are helpful guidelines for practical design.

Abstract Image

受单调弯矩作用的木制网状穹顶钢毂连接旋转性能研究
在木制网状穹顶中,广泛采用了以木构件端承和螺栓连接(EBBC 连接)为特点的钢毂连接。然而,对其机械性能的研究却很少。本文提出了一个经过改进的 EBBC 接头有限模型,该模型与现有的测试结果进行了验证,并用于进一步对承受单调弯矩的 EBBC 接头的旋转性能进行参数化研究。考虑到轴向压缩和剪切螺栓数量的影响,研究了接头在强轴和弱轴上的抗弯刚度和承载能力。结果表明,接头表现出典型的弹塑性行为。更高的压缩力和更多的剪切螺栓可以增强连接件的旋转刚度和极限力矩,但由于连接件承载区域内的木材较早失效,导致延展性降低。本文就 EBBC 接头的特征和失效机理得出了结论,为实际设计提供了有益的指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
European Journal of Wood and Wood Products
European Journal of Wood and Wood Products 工程技术-材料科学:纸与木材
CiteScore
5.40
自引率
3.80%
发文量
124
审稿时长
6.0 months
期刊介绍: European Journal of Wood and Wood Products reports on original research and new developments in the field of wood and wood products and their biological, chemical, physical as well as mechanical and technological properties, processes and uses. Subjects range from roundwood to wood based products, composite materials and structural applications, with related jointing techniques. Moreover, it deals with wood as a chemical raw material, source of energy as well as with inter-disciplinary aspects of environmental assessment and international markets. European Journal of Wood and Wood Products aims at promoting international scientific communication and transfer of new technologies from research into practice.
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