چکیده مقاله
The complicated nature of near field earthquakes and its effects on the structures, especially MDOF systems, have questioned the credibility of design spectra usage for these kinds of seismological events In comparison to the far field ground motions, a velocity pulse can be detected at the beginning of nearfield earthquakes This pulse is main factor for many disastrous effects on flexible structures as they can impart a considerable amount of energy to the low frequency structural systems Therefore, it is desired to provide a mathematical representation of the near field records for problems which lack recorded motionwith those specific characteristics Many researchers have tried to propose a mathematical model for the velocity pulse present in near field earthquakes However, neglecting the residual pulse free part of those records could lead to certain inadequacies of the resulting simulated near field records In this study, using Papageorgiou’s pulse model, a simplified model for the Fourier transform of the residual part of near fault records is proposed for their simulation The model can be calibrated using a number of parameters to properly match the target records Subsequently, regression analyses are performed in order to relate the model’s parameters to the seismological characteristics of the event Finally, an algorithm ispresented to combine the velocity pulse obtained from Papageorgiou’s model and the residual record generated using the proposed mathematical model Various parameters such as, moment magnitude, epicentral distance, etc , are involved in producing the residual record MATLAB program is used for numerical analyses
کلیدواژهها
نویسندگان
Zakariya Waezi
PhD Student, Civil Engineering, Sharif University of Technology, Tehran, Iran
Fayaz R.Rofooei
Professor, Civil Engineering Department, Sharif University of Technology, Tehran
Nader K. A. Attari
Zakariya Waezi PhD Student, Civil Engineering, Sharif University of Technology, Tehran, IranFayaz R.Rofooei Professor, Civil Engineering Department, Sharif University of Technology, Tehran
شیوه ارجاع
Waezi, Zakariya and R.Rofooei, Fayaz and Attari, Nader K. A.,1391,DEVELOPMENT OF A MATHEMATICAL MODEL FOR THE PULSE-FREE PART OF THE NEAR FAULT EARTHQUAKES FOR THEIR TIME DOMAIN SIMULATION,9th International Congress on Civil Engineering,Isfahan
ارائهشده در
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