Influence of earthquake ground motion characteristics on the dynamic response of single and multi degree of freedom systems.

• Type: Article in International Conference Proceedings Book
• Date: 2009

Authors

M. Kumar (Author) Other; J. M. Castro (Author) FEUP; A. Y. Elghazouli (Author) FEUP

Conference proceedings International

Title: STESSA 2009: Behaviour of Steel Structures in Seismic Areas

Pages: 787-792

Behaviour of Steel Structures in Seismic Areas

Philadelphia, PA, 16 a 20 de Agosto de 2009

Indexing

ISI Proceedings

Scientific classification

FOS: Engineering and technology > Civil engineering

CORDIS: Technological sciences > Engineering > Civil engineering > Structural engineering

Other information

Abstract (EN): Reliable application of modern performance based seismic design and assessment procedures requires accurate predictions of the inelastic demands expected to develop in a structure. Improved understanding of the structural inelastic behavior and of the key parameters influencing the response is therefore needed. This paper focuses on examining the effects of frequency content of the ground motion on the inelastic demands imposed on both Single Degree Of Freedom (SDOF) and Multi Degree Of Freedom (MDOF) steel-framed systems. A brief review of recent developments on this topic is firstly presented followed by a parametric study involving nonlinear dynamic analysis of both SDOF and MDOF systems. The results obtained indicate that for SDOF systems, amplification of displacements occurs when the ratio of the elastic time period (Te) of a system to the mean period of ground motion (Tm) of the system becomes lower than unity and, for MDOF systems, when higher modes become more pronounced as Tm decreases. These observations, for both SDOF and MDOF systems, tend to be more evident for higher levels of inelasticity.

Language: Portuguese

Type (Professor's evaluation): Scientific