Vibration Measurements of Tall Buildings in Korea

摘要

The design of tall building is often influenced by wind-induced vibration such as accelerations in the matter of occupant's comport. Consequently, vibration periods and damping becomes important parameter in the determination of such motions. This paper is concerned with the natural periods and damping ratios of steel buildings. It describes the vibration measurement methods employed for testing buildings and presents reliable methods of assessing natural period and damping from ambient vibration tests. This paper describes the findings from full-scale measurement of micro-tremor vibration of 21 typical high-rise buildings in Korea. Regression formulas of natural periods and damping ratios for steel-framed tall buildings are suggested. Finally, obtained natural periods are compared with empirical expressions of structural standards and eigenvalue analysis.