Journal of
Faculty of Civil Engineering

CONFERENCE PROCEEDINGS
7^th INTERNATIONAL CONFERENCE
CONTEMPORARY ACHIEVEMENTS IN CIVIL ENGINEERING 2019 , 2019.y., pp. 87-98

	DOI: 10.14415/konferencijaGFS2019.008
	UDC: 624.042.7.072.2:519.6
	CC-BY-SA 4.0 license
	Author : Salatić, Ratko
	Summary:
	Seismic analysis needs to apply a material-geometric non-linear analysis of steel frames with semi-rigid, eccentric and viscous beam-to-column connection for satisfactory steel frame response. Both nonlinearities, the geometric nonlinearity of the structure, and the material non-linearity of the connections are considered simultaneously. The flexibility of the ends of the beam is modeled using rotary springs at its ends with a nonlinear moment-rotation relation defined by a three-parameter model. The eccentricity of the connection is represented by short infinitely rigid elements. The viscous damping related to the relative velocity of the angle of relative rotation is modeled using rotary viscous dampers. For this model of the beam, a complex flexible matrix of stiffness of the element was introduced. Parametric analysis has determined the influence of connection flexibility, eccentricity, viscous damping and second order theory on the seismic response of the structure. The results of examples are illustrated in diagrams and figures. An adopted model for frame calculations can also be used to seismic response control of a structure through specifically added structural elements, such as dissipative joint connections.
	Keywords:
	steel frames, nonlinear dynamic analysis, semi-rigid eccentric connections, dissipative connections