The IUP Journal of Structural Engineering
Behavior of Steel Beam-Column Connection Subjected to Cyclic Loading: An Analytical Study
Article Details
| Pub. Date | : October, 2022 |
|---|---|
| Product Name | : The IUP Journal of Structural Engineering |
| Product Type | : Article |
| Product Code | : IJSE031022 |
| Author Name | : Suraj Koneri and Sachin R Kulkarni |
| Availability | : YES |
| Subject/Domain | : Science and Technology |
| Download Format | : PDF Format |
| No. of Pages | : 11 |
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Abstract
The paper investigates the hysteretic behavior of the semirigid steel beam-column connection due to cyclic loading. Three different models with end connections are modeled for the analysis using ABAQUS software: Model 1 with extended end plate connection without column stiffeners; Model 2 with extended end plate connection with column stiffeners; and Model 3 with seat and cleat angle connection. The cyclic load is applied as per the loading protocol provided by the AISC seismic provisions. The results represent the hysteretic behavior of the connections. The area of the hysteresis curve of each loading cycle provides the dissipated energy at each cycle of loading. The addition of the stiffness to the connection against cyclic loading results in change of behavior of the hysteresis curves, i.e., the behavior of hysteresis curves of model 2 and model 3 is stable compared to that of model l. The energy dissipation capacity of model 1 is less compared to that of model 2 and model 3, as the column stiffeners in model 1 and the outstanding legs of the angles in model 2 provide additional stiffness to the connection against cyclic loading. The stiffness of the connection starts degrading after each cycle of load.
Introduction
Conventional analysis of design of steel structures is usually carried out under the assumption that the steel beam-column connection is either fully rigid or ideally pinned. But the experimental studies carried out by various researchers proved that the beam-column connection possesses intermediate stiffness, i.e., semirigid behavior.
The moment rotation curve of the semirigid connection is nonlinear and inelastic over the entire loading range and the unloading curve is parallel to the initial stiffness of the connection, as shown in Figure 1. The behavior of semirigid connection is
Keywords
Cyclic loading, Hysteresis curve, Energy dissipation, Stiffness degradation
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