Fatigue performance of the slit end area of slotted CHS tube-to-gusset plate connection
Fatigue performance of the slit end area of slotted CHS tube-to-gusset plate connection
复制标题
DOI：
10.1016/j.tws.2022.108920
复制
发表时间：
2022-02-04
影响因子：
6.4
通讯作者：
Tsutsumi, Seiichiro
中科院分区：
文献类型：
--
作者：
Luo, Yuxiao;Qiu, Keyi;Tsutsumi, Seiichiro
开槽圆空心截面（CHS）管与扣板连接是桥梁、塔架等结构中常用的连接形式，但这种连接形式的疲劳强度需要进行表征。在本研究中，研究了这种连接的狭缝端区疲劳性能。对狭缝端带孔连接进行了四组大型疲劳试验。此外，通过有效缺口应力（ENS）方法对文献中可用的CHS连接的疲劳试验进行了重新分析。随后，进行了参数化研究，分析了不同几何和焊接策略对缺口应力集中系数的影响。指出了应用于这种类型连接的ENS方法的缺点，并提出了可能的替代解决方案。最后，提出了提高这种开槽CHS管与扣板连接疲劳强度的优化设计方案。
Slotted circular hollow section (CHS) tube-to-gusset plate connections are frequently used in structures such as bridges, towers, etc., However the fatigue strength of this type of connections needs to be characterized. In the present study, the fatigue performance of the slit end area of this connection is investigated. Four sets of large-scale fatigue tests on the connection with coped hole at the slit end are carried out. Additionally, fatigue tests on CHS connections, available in the literature, are re-analyzed by means of effective notch stress (ENS) approach. Subsequently, parametric studies are carried out to analyze the influence of different geometrical and welding strategies on the notch stress concentration factor. The shortcomings of the ENS approach applied to this type connection are pointed out, proposing possible alternative solutions. Lastly, the optimal design for improving the fatigue strength of this slotted CHS tube-to-gusset plate connection is recommended.