Page - 1100 - in Book of Full Papers - Symposium Hydro Engineering

SEISMIC HAZARD ANALYSIS FOR GAMBIRI DIVERSION DAM S.SOLEYMANI1, A.MAHDAVIAN2, H.BAHRAMI3 1Expert of Engineering Seismology, TOOSSAB CONSULTATNT ENGINEERING COMPANY IRAN 2University professor, UNIVERSITY OF WATER AND POWER TECHNOLOGY IRAN 3PhD candidate in Engineering Geology, FERDOWSI UNIVERSITY OF MASHHAD IRAN 1. INTRODUCTION The Gambiri diversion dam is located at east of Kunar province, near the Asadabad city on the Kunar river, eastern Afghanistan "Fig 1". This project falls within a region of very high seismicity, in the eastern sector of Alpine- Himalaya orogenic belt. In order to estimate the ground motion parameters a comprehensive seismic hazard analysis was performed. This paper gives first a brief overview of the seismo-tectonics of the region and the seismicity. The methodology followed to obtain the peak ground acceleration, response spectra and design accelerograms for different design levels is then described together with selected results. 2. SEISMOTECTONIC SETTING AND HISTORICAL SEISMICITY As recent deformation continues in the Alpine- Himalaya region, moderate- to-large magnitude, potentially damaging earthquakes are common. Earthquakes in this region will likely cause serious damage, not only from strong ground shaking and faults rupturing the ground surface, but also from liquefaction, lateral spreading and extensive landslide. 1100