ABSTRACT

In this study, the Local Joint Flexibility (LJF) of tubular T/Y-joints with doubler plate under in-plane bending (IPB) load is investigated. In the first step, a finite element (FE) model was developed and verified using the available experimental results. In the next step, 252 FE models were generated to investigate the effect of the joint geometry on the LJF factor (f _LJF). Results showed that the increase of the doubler plate size results in the considerable decrease of the f _LJF. Also, the f _LJF of a T/Y-joint reinforced with doubler plate can be down to 26% of the f _LJF of the corresponding unreinforced joint. Despite the considerable effect of the doubler plate on the f _LJF, there is not any study on the f _LJF of the tubular joints with doubler plate. Hence, after a parametric study, FE results were used to propose a parametric formula for determining the f _LJF.

摘要

在这项研究中，研究了在面内弯曲（IPB）载荷下带有双层板的管状T / Y接头的局部接头挠性（LJF）。第一步，开发有限元（FE）模型，并使用可用的实验结果进行验证。下一步，生成了252个有限元模型，以研究关节几何形状对LJF因子（f _LJF）的影响。结果表明，倍增板尺寸的增大导致f _LJF的减小。此外，˚F _LJF一个T / Y型接头的与加强板加强的可下降到26％˚F _LJF相应未增强关节的。尽管倍增板对f _LJF，没有关于带_双层板的管接头的f _LJF的研究。因此，经过参数研究后，有限元结果用于提出确定f _LJF的参数公式。