Steel and Composite Structures

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Pushover analysis of gabled frames with semi-rigid connections

  • Shooshtari, Ahmad (Department of Civil Engineering, Engineering Faculty, Ferdowsi University of Mashhad) ;
  • Moghaddam, Sina Heyrani (Department of Civil Engineering, Engineering Faculty, Ferdowsi University of Mashhad) ;
  • Masoodi, Amir R. (Department of Civil Engineering, Engineering Faculty, Ferdowsi University of Mashhad)
  • Received : 2014.08.15
  • Accepted : 2014.12.12
  • Published : 2015.06.25
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Abstract

The nonlinear static analysis of structure, which is under the effect of lateral loads and provides the capacity curve of the structure, is defined as a push-over analysis. Ordinarily, by using base shear and the lateral displacement of target point, the capacity curve is obtained. The speed and ease of results interpretation in this method is more than that of the NRHA responses. In this study, the nonlinear static analysis is applied on the semi-rigid steel gabled frames. It should be noted that the members of this structure are analyzed as a prismatic beam-column element in two states of semi-rigid connections and supports. The gabled frame is modeled in the OpenSees software and analyzed based on the displacement control at the target point. The lateral displacement results, calculated in the top level of columns, are reported. Furthermore, responses of the structure are obtained for various support conditions and the rigidity of nodal connections. Ultimately, the effect of semi-rigid connections and supports on the capacity and the performance point of the structure are presented in separated graphs.

Keywords

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