Dynamic Characteristic Investigation of a Historical Masonry Building and Surrounding Ground in Kathmandu
Hari Ram Parajuli*1, Junji Kiyono*2, Masatoshi Tatsumi*2,
Yoshiyuki Suzuki*1, Hisashi Umemura*3,
Hitoshi Taniguchi*1, Kenzo Toki*1, Aiko Furukawa*4,
and Prem Nath Maskey*5
*1Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, 58 Komatsu-bara Kita-machi, Kitaku, Kyoto 603-8341, Japan
*2Department of Urban Management, Kyoto University, Japan
*3Faculty of Engineering, Nagoya Institute of Technology, Japan
*4Department of Civil and Earth Resources Engineering, Kyoto University, Japan
*5Department of Civil Engineering, Institute of Engineering, Tribhuvan University, Nepal
Saving human lives and cultural heritage from natural disasters is a key to earthquake-disaster mitigation strategies. Culturally valued structures built before earthquake codes and regulations emerged are often vulnerable to earthquake loads, but such structures must be comprehensively studied before applying mitigation measures. Microtremor measurements in Patan Durbar Square area, a World Heritage site, were investigated to determine dynamic properties of the soil at four locations and the predominant ground frequency calculated to be 2.07 Hz. Ambient vibration in an old masonry building was measured and vibration frequencies in different modes were detected using the Fourier spectrum, which found that the building has fundamental period in transverse direction. The building’s damping was estimated to be 5.2-6.4%.
Yoshiyuki Suzuki, Hisashi Umemura,
Hitoshi Taniguchi, Kenzo Toki, Aiko Furukawa, and
and Prem Nath Maskey, “Dynamic Characteristic Investigation of a Historical Masonry Building and Surrounding Ground in Kathmandu,” J. Disaster Res., Vol.6, No.1, pp. 26-35, 2011.
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