The Effect of Long Duration Earthquakes on the Overall Seismic Behavior of Steel Structures Designed According to Eurocode 8 Provisions

Vibration

Panagiota Katsimpini¹  Nikos Pnevmatikos²  Foteini Konstandakopoulou³  GeorgeD. Hatzigeorgiou³  GeorgeA. Papagiannopoulos³ 

[1] Department of Civil Engineering, University of Patras, GR-26500 Patras, Greece;Department of Civil Engineering, University of West Attica, GR-12241 Athens, Greece;School of Science and Technology, Hellenic Open University, GR-26335 Patras, Greece;

关键词: steel buildings;    seismic performance;    dynamic soil–structure interaction;    long duration earthquakes;    Eurocode 8;   

DOI  :  10.3390/vibration3040029

来源: DOAJ

【 摘 要 】

Premature and simultaneous buckling of several steel braces in steel structures due to the prolonged duration of a seismic motion is one of the issues that must be addressed in the next version of Eurocode 8. In an effort to contribute towards the improvement of the seismic design provisions of Eurocode 8, an evaluation of the overall behavior of some steel building-foundation systems under the action of long duration seismic motions is performed herein by means of nonlinear time-history seismic analyses, taking into account soil–structure interaction (SSI) effects. In particular, the maximum seismic response results—in terms of permanent interstorey drifts, overturning moments and base shears of the steel buildings as well as of the permanent settlement and tilting of their foundations—are computed. It is found that the seismic performance of steel buildings when subjected to long duration seismic motions is: (i) acceptable for the two and five-storey fixed base steel buildings and for the two-storey steel buildings with SSI effects included; (ii) unacceptable for the eight-storey fixed base steel buildings and for the five and eight-storey steel buildings with SSI effects included. In all cases of steel buildings with SSI effects included, the seismic performance of the mat foundation, as expressed by the computed values of residual settlement and tilting, is always acceptable.

【 授权许可】

Unknown