This paper is concerned with the dynamic characteristics of buildings, especially with the measurement of the natural frequencies(natural periods) and the damping. Process of ambient vibration and synchronized human excitation tests for natural period and damping are given. Data from measurement on 16 reinforced concrete buildings in Seoul and Seoul national university of technology are given. 16 Low-rise Reinforced concrete buildings are measured for ambient vibration to obtain the vibrations characteristics. The natural periods obtained by ambient vibration measurements are compared with those of forecast model suggested by standards and foreign researchers. The natural periods show a clear dependence on building height. On the other hand, the damping ration scatter under the influence of various factors, for example, building height and natural frequency.

• 강동균(케이에스엠기술(주) 차장, 공학석사) | Kang, Dong-Gyun
• 윤성원( 서울산업대 건축설계학과 조교수, 공학박사) | 윤성원