Steel and Composite Structures

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Seismic performance of moment resisting steel frames retrofitted with coupled steel plate shear walls with different link beams

  • Amir Masoumi Verki (Faculty of Civil Engineering, K. N. Toosi University of Technology) ;
  • Adolfo Preciado (Department of Habitat and Urban Development, Western Institute of Technology and Higher Education (ITESO)) ;
  • Pegah Amiri Motlagh (Faculty of Mechanical Engineering, Tarbiat Modares University)
  • Received : 2022.03.26
  • Accepted : 2023.03.06
  • Published : 2023.03.10
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Abstract

In some buildings, the lateral structural response of steel framed buildings depends on the shear walls and it is very important to study the behavior of these elements under near-field seismic loads. The link beam in the opening of the shear wall between two wall plates is investigated numerically in terms of behavior and effects on frames. Based on the length of the beam and its bending and shear behavior, three types of models are constructed and analyzed, and the behavior of the frames is also compared. The results show that by reducing the length of the link beam, the base shear forces reduce about 20%. The changes in the length of the link beam have different effects on the degree of coupling. Increasing the length of the link beam increases the base shear about 15%. Also, it has both, a positive and a negative effect on the degree of coupling. The increasing strength of the coupling steel shear wall is linearly related to the yield stress of the beam materials, length, and flexural stiffness of the beam. The use of a shorter link beam will increase the additional strength and consequently improving the behavior of the coupling steel shear wall by reducing the stresses in this element. The link beam with large moment of inertia will also increase about 25% the additional strength and as a result the coefficient of behavior of the shear wall.

Keywords

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