Numerical and theoretical analysis of staggered cruciform stubs: Fid-Bau Portal

Numerical and theoretical analysis of staggered cruciform stubs

Xu, Jing / Wang, Peng / Li, Jianxin / Yu, Lie / Zhao, Dongzhuo

Abstract 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%.

Highlights • Determine the critical parameters influencing the tensile behavior of staggered cruciform stubs. • Propose and verify a method for predicting the initial stiffness of staggered cruciform stubs. • Simplify the method to calculate plastic resistance and illustrate its loading using curve models.