Author/Authors :
Moosavi, Mojtaba Geotechnical Engineering Research Center - International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran , Ashayeri, Iman School of Engineering - Razi University, Kermanshah, Iran , Haghshenas, Ebrahim Geotechnical Engineering Research Center - International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran , Biglari, Mahnoosh School of Engineering - Razi University, Kermanshah, Iran , Kamalian, Mohsen Geotechnical Engineering Research Center - International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran , Jalili, Javad Geotechnical Engineering Research Center - International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran
Abstract :
The destructive earthquake of Sarpol-e Zahab (Mw=7.3, Depth=18 Km) lead to
sever damages to manyof structures of the affected region. The first reconnaissance
of the area showed that the structures damage distribution could be interpreted by
the effect of local site conditions. Therefore, some microtremor measurements and
geophysical surveys were performed to investigate this concern. The survey included
totally 41 locations of microtremor measurements and 40 locations of geophysical
refraction profiles, the distribution of which covered all over the city. The recorded
motions were analyzed using horizontal to vertical spectral ratio (HVSR) method to
determine the natural frequencies of the alluvium; primary and secondary waves
velocitywere also measured as a complementarydata. The survey results concluded
to the preliminary seismic site classification map for the city, which would be useful
for future safe design of structures.
