International journal of steel structures (국제강구조저널)

Korean Society of Steel Construction (한국강구조학회)
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Evaluating the Seismic Performance of Off-centre Bracing System with Circular element in Optimum Place

  • Received : 2012.07.27
  • Accepted : 2014.02.21
  • Published : 2014.06.30
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Abstract

Braced structures with concentric braces are among earthquake resistant systems that are widely used in frames with joint connections. Ductility, dissipation of energy and decreasing in base shear are the benefits of these bracing systems. Despite the benefits mentioned limited ductility of concentric braces, however, caused poor functionality against earthquake. Therefore in this paper, new bracing system using circular element (circular dissipater) has been evaluated, in order to replace damaged member without needing rehabilitation or repair of general system. So using nonlinear software package ANSYS a frame with off-centre bracing system with optimum eccentricity (OBS-C-O) and another frame with same specifications without circular element (OBS) has been created. The function of general system has been studied for the first time. Linear and nonlinear behavior of these two frames compared to each other so the benefits of this circular element in an off-centre bracing system are highlighted. The analytical results and comparison between plots of these two models showed that the first model has higher performance than the others.

Keywords

References

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