Open Access

ARTICLE

Inelastic Behaviour of Steel Structures Subjected to Multiple Earthquakes

G.D. Hatzigeorgiou¹, D.E. Beskos²

1 Democritus University of Thrace, Xanthi, Xanthi, Greece.
2 University of Patras, Patras, Achaia, Greece.

Structural Longevity 2012, 7(3), 143-149. https://doi.org/10.3970/sl.2012.007.143

Abstract

In this paper, a systematic investigation is carried out on the seismic behaviour of plane moment resisting steel frames (MRF) and plane concentrically X-braced steel frames (CBF) to multiple strong ground motions. Such a sequence of earthquakes results in a significant damage accumulation in a structure because any rehabilitation action between any two successive seismic motions cannot be practically materialised due to lack of time. In this work, thirty-six MRF and thirtysix CBF which have been designed for seismic and vertical loads according to European codes are subjected to five real seismic sequences which are recorded at the same station, in the same direction and in a short period of time, up to three days. This investigation shows that the sequences of ground motions have a significant effect on the response and, hence, on the design of MRF and CBF.

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Keywords

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