assessment of site effects and soil-structure resonance in algiers center

The damage pattern in urban areas during an earthquake depends on the characteristics of the event and on the interaction between site response and vulnerability of the exposed structures (gosar, 2012). shear wave velocity vs is one of the mostimportant input parameter to characterize the dynamic properties of soil. several geotechnical and geophysical methods are developed for estimates directly or indirectly the parameter vs. the microtremor horizontal-to-vertical spectral ratio (hvsr) method has been widely used for site effect studies (ohmachi et al., 1991; field and jacob, 1995; bard, 1998). theapplication of microtremor measurements has been extended to identify the fundamental frequencies of buildings (goar, 2010).