Dear سمانه درخشان,

Your question is not clear as you are not giving any information on the historical building. In this case it is difficult to give you a proper advice.

I can tell you that I have developed retrofitting designs for several historical buildings and for these cases I have used created by me seismic isolation technologies. Such an approach permits to significantly decrease the seismic forces acting on the buildings (about three times) and, therefore, there is no need to increase the size of foundation. Hope my answer will be of help in your work.

Best regards,

Mikayel Melkumyan

Doctor of Sciences (Engineering), Professor

Academician of the Saint-Petersburg Arctic Academy of Sciences

Academician of the Athens Institute for Education and Research

President of the Armenian Association for Earthquake Engineering

Vice-President of the International Association of CIS Countries on Base Isolation

Member of the USA Association for Science and Technology

Foreign member of the Research Center of Seismic Resistant Structures of the Institute of Industrial Science, University of Tokyo

Eminent Expert of the Committee of Eminent Experts in International Research Base of Seismic Mitigation and Isolation of Gansu Province in China

Founder of the "Save the Yerevan Schools From Earthquakes" foundation

Director of the "Melkumyan Seismic Technologies" LLC

+374 (91) 94-54-02

www.melkumyanseismic.com

thanks