Investigating of linear and nonlinear performance of the simpson strong-tie connection

Ali Ghamari ¹ (Department of Civil Engineering, Darreh-Shahr Branch, Islamic Azad University, Darreh-Shahr, Iran.)
Farzin Ghaffari ² (Department of Civil Engineering, Aria University of Science and Sustainability, Tehran, Iran.)
Leila Hosseinzadeh ³ (Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran.)

Submited date : 2020-02-08 accepted date : 2023-12-05

Keywords: Strength, ductility, Stiffness, Moment Frame, Prequalified Connection,

Abstract :

After the Northridge earthquake, it was found that the beam-to-column connections in the moment frames were weak and needed to be revised. In recent years, the use of bolted connections have expanded and replaced almost welded connections. The US Code of Conduct (AISC358-16) introduced a new connection called the Simpson Connection, a semi-rigid connection with the idea of damage control. Progressive connection is a new and smart type of screw connection that includes a weakened plate, end plate, corner as well as a buckle plate. The main purpose of this study is to investigate the linear and nonlinear behavior of Simpson connectivity using ABAQUS software. The baseline sample was selected from the model outlined in US Code (AISC358-16). To gain a better understanding of the new Simpson junction model, 14 numerical specimens were modeled and the strengths and stiffness of the models were compared. In this connection, the geometry of weeded plate and its performance is important. In so doing, variables such as mid-length, mid-width, initial length, as well as stiffeners were evaluated in the initial length of the weakened plate. The model with a thickness of 30 mm thicker than the other models with respect to the mentioned characteristics, showed acceptable results including anchor tolerance of 1010 kN and energy absorption of 55.53 kN which showed its use in seismic regions. Above is appropriate.