Abstract Past experimental research on top-and seat-angle with double web-angle connection (TSACW) was limited by the rate and magnitude of actuator displacement and hence results did not give information on failure mode and ultimate capacities of connection. Furthermore, extensive literature review on TSACW revealed the need for developing an accurate finite element approach to represent the characteristics of the moment-rotation behavior. Therefore, this study examined the influence of connection parameters on flexural resistance, stiffness, rotation, ductility and failure modes obtained for such joints. Explicit Finite element (FE) analyses of connection models were carried out by using ABAQUS/CAE to explore the effect of material properties of bolts and angles on moment-rotation (M-ϕ) characteristics of TSACW under monotonic loading. Applicability of six currently available M-ϕ functions was assessed by comparing them with those obtained from FE analyses. In most cases, the ultimate flexural resistance of TSACW was increased whilst its rotational capacity was decreased with the use of A572 or A514 angles with less pronounced effect on the initial stiffness. The connection failure was controlled via large deformations achieved by the top angle. Among the six selected M-ϕ functions, Richard-Abbott model was found suitable for fitting the normalized moment-rotation curves for TSACW joints.

中文翻译：

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高强钢双腹板角钢连接顶座角钢数值研究

摘要 过去对双腹板角连接（TSACW）的顶角和座角的实验研究受到执行器位移的速率和幅度的限制，因此结果没有给出连接的失效模式和极限能力的信息。此外，关于 TSACW 的大量文献回顾表明需要开发一种精确的有限元方法来表示力矩-旋转行为的特征。因此，本研究检验了连接参数对此类接头的抗弯强度、刚度、旋转、延展性和失效模式的影响。通过使用 ABAQUS/CAE 对连接模型进行显式有限元 (FE) 分析，以探索螺栓的材料特性和角度对 TSACW 在单调载荷下的力矩-旋转 (M-φ) 特性的影响。六个当前可用的 M-φ 函数的适用性是通过将它们与从有限元分析中获得的函数进行比较来评估的。在大多数情况下，使用 A572 或 A514 角度对初始刚度的影响较小，TSACW 的极限抗弯强度增加，而其旋转能力降低。连接失败是通过顶角实现的大变形来控制的。在六个选定的 M-ϕ 函数中，Richard-Abbott 模型适合拟合 TSACW 接头的归一化力矩-旋​​转曲线。使用 A572 或 A514 角度对初始刚度的影响较小，TSACW 的最终抗弯强度增加，而其旋转能力降低。连接失败是通过顶角实现的大变形来控制的。在六个选定的 M-ϕ 函数中，Richard-Abbott 模型适合拟合 TSACW 接头的归一化力矩-旋​​转曲线。使用 A572 或 A514 角度对初始刚度的影响较小，TSACW 的最终抗弯强度增加，而其旋转能力降低。连接失败是通过顶角实现的大变形来控制的。在六个选定的 M-ϕ 函数中，Richard-Abbott 模型适合拟合 TSACW 接头的归一化力矩-旋​​转曲线。