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Numerical and Theoretical Study on Mechanical Behaviors of New Dovetail Joint System (NDJs) Subjected to Tensile, Compressive, and Out-of-plane Bending Moment Forces
International Journal of Steel Structures ( IF 1.5 ) Pub Date : 2021-05-26 , DOI: 10.1007/s13296-021-00492-z
W. A. H. Mashrah , Zhihua Chen , Hongbo Liu

In this study, a new dovetail system of single-layer reticulated shell socketed joint (NDJs) of steel with excellent mechanical behaviour and economic benefits is suggested and investigated. Theoretical and numerical approaches were adopted to explore the influence of the different design parameters on the mechanical behaviour of NDJs under axial tension, compression forces and out-of-plane bending moment. First, NDJs exhibited two main failure modes under compressive force which occurred in the H-section beam and throat neck. On the other hand, the failure of the NDJs under tensile force occurred on the slot edges and hub ring, which means the NDJs TYS bearing capacity is responsive to slot edge width (\({\mathrm{d}}_{\mathrm{m}}\)) and hub ring thickness (\({\mathrm{d}}_{\mathrm{w}}\)). Moreover, the resisting bending failure characteristics of NDJs combined characteristics of resisting compressive and tensile forces. Second, formulae of compressive, tensile, and bending yield strength bearing capacity of NDJs were derived, and the average of analytical to numerical results was calculated. Analytical analysis results matched very well with the FEA results and showed a very high calculation validity and efficiency. Finally, NDJs shows excellent behaviour under different axial loads and bending moment comparing with other types of bolted or assembled joints with the same size or used materials.



中文翻译:

燕尾榫新系统(NDJs)在拉伸,压缩和平面外弯矩作用下的力学行为的数值和理论研究

在这项研究中,提出并研究了一种新的燕尾榫系统,该系统具有优异的机械性能和经济效益,是一种新型的单层网状钢壳套接接头(NDJs)。采用理论和数值方法探讨了不同设计参数对NDJ在轴向拉力,压缩力和平面外弯矩作用下的力学行为的影响。首先,NDJ在H型截面梁和喉管颈部的压缩力作用下表现出两种主要的破坏模式。另一方面,NDJ受拉力的破坏发生在槽边缘和轮毂环上,这意味着NDJ的TYS承载能力对槽边缘宽度(\({\ mathrm {d}} _ {\ mathrm { m}} \))和轮毂环厚度(\({\ mathrm {d}} _ {\ mathrm {w}} \\))。而且,NDJ的抗弯曲破坏特性结合了抗压缩力和抗拉力的特性。其次,推导了NDJ的抗压,抗拉和弯曲屈服强度承载力的公式,并计算了解析结果到数值结果的平均值。分析分析结果与有限元分析结果非常吻合,并显示出很高的计算效度和效率。最后,与相同尺寸或​​使用过的材料的其他类型的螺栓连接或组装接头相比,NDJ在不同的轴向载荷和弯矩下表现出优异的性能。

更新日期:2021-05-26
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