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Abstract
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Historic heritage buildings are a part of historic basis of each society and an economic resource.
Therefore, preserving and maintenance of these buildings are cultural, economic and social demand.
This research investigates the seismic performance of a historical building named Arg of Tabriz (Arge
Alishah) that dates back to 14th century and is located at the city center of Tabriz (NW of Iran). Static,
modal, and finally nonlinear dynamic (time history) analysis were performed by both “Considering Soil-
Structure Interaction (SSI)” and “fixed base (ignoring SSI)” Cases.
It is found from the results that, SSI extremely affects mode shapes and their frequencies and
depending on the frequency content of the records, can has an incremental or decremental effect
on structural responses. As expected, the building of Arg could carry gravity loads easily and
despite its stability against earthquake loading in fixed base case, showed a weakness (especially
in eastern and western walls direction) and overturned when it was analyzed in SSI case because
of yielding of the surrounding soil.
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