Loading...

Experimental investigation of moment resisting frames with perforated shear link

Mirghaderi, S. R ; Sharif University of Technology | 2021

189 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.istruc.2021.03.060
  3. Publisher: Elsevier Ltd , 2021
  4. Abstract:
  5. This paper focuses on the application of a new shear link in moment-resisting frames by perforating the web at the mid-span of the beam. Typically, in moment-resisting frames the plastic hinges are formed at the end of the beams adjacent to the beam-column connections. Seismic codes specify a minimum length for the beams that are part of the moment-resisting frames to ensure those beams are flexure-critical, and their plastic hinges are formed at their ends. The use of shear fuse in the mid-span of seismic beams enables the designers to violate the minimum span-to-depth ratio requirement and facilitates the replacement of the damaged parts of the perforated web moment resisting frames subjected to strong ground motions. In this study, a new shear link is proposed in the mid-span of the beam through perforating the web, resulting in a different plastic mechanism in structural beams. Two single-bay perforated web moment resisting frames with a beam span-to-depth ratio less than that required by seismic code provisions are tested. The specimens are subjected to a displacement-controlled cyclic loading. The test results are compared with those of a conventional moment-resisting frame with identical material and geometrical properties. Based on the test results, the new proposed perforated web moment resisting frames provides sufficient strength and stiffness with stable cyclic hysteresis loops. Besides, this frame is proposed in the rehabilitation of existing buildings for its ease of construction and providing shear fuse in the middle of the beam. © 2021 Institution of Structural Engineers
  6. Keywords:
  7. Steel moment resisting frame ; Rehabilitation ; Experiment ; Shear link ; Span-to-depth ratio
  8. Source: Structures ; Volume 32 , 2021 , Pages 516-531 ; 23520124 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S235201242100240X