MICROTREMOR MEASUREMENTS ON ARG-E TABRIZ (TABRIZ CITADEL) TO GET ITS DYNAMIC CHARACTERISTICS

Arg -e Tabriz is a huge masonry structure which has been built in 14th century in Tabriz, Iran. At the time being, the remains of this building are only three huge brick walls arranged in U shape. The height of the building is 33 m and its length in web side is about 50 m and width along flange walls is about 20 m. The average thickness of the walls is 10 m. To study seismic assessment of the building, microtremor measurements were performed to estimate its dynamic characteristics and its site ground. Total number of measurement locations was chosen as ten; and totally twenty one components were recorded at the ground surface, basement, 1st floor and top of the building. The tests resulted in that the natural frequency of the building is 2.6 Hz in the both EW and NS directions. The natural frequency of the ground subsurface was also estimated by using H/V spectral ratio (H: Horizontal and V: Vertical) and obtained as 5.0 Hz.

کلیدواژه ها:

Arg-E Tabriz ، Microtremor Measurements ، Natural Frequency