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Experimental investigation into the behaviour of a new replaceable bracing system

Khonsari, S. V ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1115/OMAE2012-83697
  3. Publisher: 2012
  4. Abstract:
  5. A new bracing system with new features somewhat different from those of the existing ones was devised and is presented. These features comprise some of the advantages of eccentric bracing systems including their ability to dissipate energy through bending of flexural elements while lacking some of the disadvantages of such systems including their inability of being replaced upon damage during events such as earthquakes, etc. While in traditional types of braces, including both concentric and eccentric ones, braces are under axial loading, in this new system they work in a bending capacity. As a result, the sort of flexibility which is introduced in the system in the presence of eccentric braces (definitely at the price of forcing the potential damage to occur and be concentrated at the girders/beams to which such braces are connected), is now provided by the braces and at the price of sacrificing them. Therefore, if the level of damage is such that the damaged element is no longer usable, the replacement of the braces is a more viable and economically justifiable than that of the girders. Moreover, since girders, as part of the deck/floor system, are normally engaged with other elements such as stringers/joists, their replacement may not be practically possible at all. Such bracing systems, called Broken Beam Bracing System (BBBS), have the potential of being used in offshore/onshore structures as originally-used elements or in a retrofit/repair capacity
  6. Keywords:
  7. Cyclic loading ; Onshore structures ; Structural bracing systems ; Beam bracing systems ; Bending capacity ; Bracing systems ; Eccentric bracing ; Experimental investigations ; Flexural elements ; Off shore platforms ; Replaceable bracings ; Arctic engineering ; Cyclic loads ; Drilling platforms ; Energy dissipation ; Offshore structures ; Repair ; Retrofitting ; Steel structures ; Beams and girders
  8. Source: Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE ; Volume 2 , 2012 , Pages 427-437 ; 9780791844892 (ISBN)
  9. URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1732661