Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
SSI in steel frames subjected to near-fault earthquakes
Abstract Modern seismic codes are usually associated with far-field earthquakes and generally neglect soil–structure interaction, assuming that omission of this phenomenon leads to conservative results. This study investigates the effect of soil–structure interaction on the inelastic response of two-dimensional steel frames subjected to near-fault earthquakes, which have been recorded near to seismic faults with reverse and strike–slip mechanisms. In order to achieve this, thirty-six planar moment resisting steel frames which have been designed for seismic and vertical loads according to European codes are examined under the action of sixty near-fault pulse-like records. Simplified soil–structure interaction is carried out using springs and dashpots to simulate the flexibility of soil at the soil–foundation interface and adopting the effective properties of soil. Seismic response parameters, such as, interstorey drift ratios, maximum floor accelerations and inelastic displacement ratios are numerically determined by dynamic inelastic analyses. After a comprehensive statistical analysis, empirical expressions for these parameters in terms of the number of storeys of structures, the type of fault mechanism as well as the consideration or not of soil–structure interaction are obtained. Critical examination of the results indicates that the flexibility of soil strongly affects the seismic response of steel frames. Furthermore, it is concluded that the structural response parameters under consideration are noticeably influenced by the type of fault mechanism.
Highlights Seismic response of plane steel moment resisting frames as affected by SSI. Influence of near-fault excitations on the seismic behavior of above frames. Influence of type of fault mechanism on the seismic behavior of above frames. Empirical expressions for IDR, max floor accelerations and inelastic displ. ratios.
SSI in steel frames subjected to near-fault earthquakes
Abstract Modern seismic codes are usually associated with far-field earthquakes and generally neglect soil–structure interaction, assuming that omission of this phenomenon leads to conservative results. This study investigates the effect of soil–structure interaction on the inelastic response of two-dimensional steel frames subjected to near-fault earthquakes, which have been recorded near to seismic faults with reverse and strike–slip mechanisms. In order to achieve this, thirty-six planar moment resisting steel frames which have been designed for seismic and vertical loads according to European codes are examined under the action of sixty near-fault pulse-like records. Simplified soil–structure interaction is carried out using springs and dashpots to simulate the flexibility of soil at the soil–foundation interface and adopting the effective properties of soil. Seismic response parameters, such as, interstorey drift ratios, maximum floor accelerations and inelastic displacement ratios are numerically determined by dynamic inelastic analyses. After a comprehensive statistical analysis, empirical expressions for these parameters in terms of the number of storeys of structures, the type of fault mechanism as well as the consideration or not of soil–structure interaction are obtained. Critical examination of the results indicates that the flexibility of soil strongly affects the seismic response of steel frames. Furthermore, it is concluded that the structural response parameters under consideration are noticeably influenced by the type of fault mechanism.
Highlights Seismic response of plane steel moment resisting frames as affected by SSI. Influence of near-fault excitations on the seismic behavior of above frames. Influence of type of fault mechanism on the seismic behavior of above frames. Empirical expressions for IDR, max floor accelerations and inelastic displ. ratios.
SSI in steel frames subjected to near-fault earthquakes
Minasidis, G. (Autor:in) / Hatzigeorgiou, G.D. (Autor:in) / Beskos, D.E. (Autor:in)
Soil Dynamics and Earthquake Engineering ; 66 ; 56-68
28.06.2014
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
SSI in steel frames subjected to near-fault earthquakes
| Online Contents | 2014
Design criteria for steel moment resisting frames subjected to earthquakes
| British Library Online Contents | 2001
Friction Damped Steel Moment-Resisting Frames Subjected to Long-Distance Earthquakes:
| Online Contents | 2003
HAUPTAUFSÄTZE - Design criteria for steel moment resisting frames subjected to earthquakes
| Online Contents | 2001