Author(s)

T. Aoki, S. Kato & K. Ishikawa

Abstract

Structural characteristics of the dome of Hagia Sophia from measurement of micro tremor T. Aoki," S. Kato,& K. Ishikawa" ^ Department of Structural Engineering, Nagasaki University, Bunkyo-machi 1-14? Nagasaki 852, Japan ** Department of Architecture and Regional Planning, Toyohashi University of Technology, Tempaku, Toyohashi 441> Japan ^ Department of Architecture, Ishikawa College of Technology, Kitanakajyou, Ishikawa 929-03, Japan ABSTRACT In order to clarify the structural characteristics of the dome as a whole, we conduct the measurement of micro tremors at Hagia Sophia. As a brief result of the measurement, we prepared some figures showing the funda- mental frequencies of micro tremors observed at several points, such as on the second floor, at the secondary cornice and at the dome cornice, within the structure of Hagia Sophia. The fundamental frequency is considered around 2 Hz, that is about 0.5 second per one cycle, in both directions of NS and EW. The fund

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