Numerical and theoretical analysis of staggered cruciform stubs

作者：Xu, Jing; Wang, Peng^*; Li, Jianxin; Yu, Lie; Zhao, Dongzhuo

来源：JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, 2022, 197: 107481.

DOI：10.1016/j.jcsr.2022.107481

• Cruciform stub
• Finite element analysis
• Initial stiffness
• Plastic resistance
• Staggered bolt pattern

The stiffened top-and-seat angle (STSA) connection has seen sensitive use due to its considerable stiffness, resistance, and replaceability. However, the requirement for ductility prevents further resistance enhancement. This issue could be solved by a new improved configuration (termed staggered large STSA), but it is urgent to evaluate the mechanical property and parameter influence. This paper employs the component method to conduct a numerical and theoretical investigation of the critical tensile component-cruciform stub, taking into account the influences of stub thickness, bolt pattern, and bolt diameter. With the theory of plates and shells, a model for predicting initial stiffness is proposed to provide a detailed design procedure. In addition, the paper simplifies and verifies the method for plastic resistance based on the theory of virtual work. These methods are followed by a suitable curve model to depict the tensile behavior of staggered cruciform stubs. The average prediction error is less than 10%.

• 单位
  广州大学; 东莞理工学院; 广州航海高等专科学校