عنوان مقاله [English]
Recorded earthquakes on near fields have special characteristics different from other usual records. Buildings placed near faults should be designed for the effects of such faults. Because of existing such faults in some cities in Iran such as Tehran and Tabriz, the effect of them should be considered in seismic codes in Iran. In this paper a comparison among various seismic design codes has been carried out almost this effect leads to increase the base shear using a separate coefficient that implies to design spectrum. This coefficient is a combination and a function of distance and period being larger in more near distance and longer periods. This effect has been considered in seismic design codes in some countries such as Taiwan, New Zealand and United States. In this paper a brief review of some seismic design codes and the new version of the Iranian seismic code of practice is presented.