Steel and Composite Structures

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Cyclic behaviour of infilled steel frames with different beam-to-column connection types

  • Sakr, Mohammed A. (Department of Structural Engineering, Faculty of Engineering, Tanta University) ;
  • Eladly, Mohammed M. (Department of Structural Engineering, Faculty of Engineering, Tanta University) ;
  • Khalifa, Tarek (Department of Structural Engineering, Faculty of Engineering, Tanta University) ;
  • El-Khoriby, Saher (Department of Structural Engineering, Faculty of Engineering, Tanta University)
  • Received : 2018.09.22
  • Accepted : 2019.03.05
  • Published : 2019.03.10
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Abstract

Although numerous researchers demonstrated the significant difference in performance between the various beam-to-column connection types, most of the previous studies in the area of infilled steel frames focused on the behaviour of frames with welded connections. Therefore, there is a need for conducting studies on infilled steel frames with other common connection types (extended endplate with and without rib stiffeners, flush endplate and shear connections). In this paper, firstly, a two-dimensional finite-element model simulating the cyclic response of infilled steel frames was presented. The infill-frame interaction, as well as the interactions between connections' components, were properly modelled. Using the previously-validated model, a parametric study on infilled steel frames with five different beam-to-column connection types, under cyclic loading, was carried out. Several parameters, including infill material, fracture energy of masonry and infill thickness, were investigated. The results showed that the infilled frames with welded connections had the highest initial stiffness and load-carrying capacity. However, the infilled frames with extended endplate connections (without rib stiffeners) showed the greatest energy dissipation capacity and about 96% of the load-carrying capacity of frames with welded connections which indicates that this type of connection could have the best performance among the studied connection types. Finally, a simplified analytical model for estimating the stiffness and strength of infilled steel frames (with different beam-to-column connection types) subjected to lateral cyclic loading, was suggested.

Keywords

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