Abstract
Damping ratios of structures are generally scattering under the influence of various excitations. Wind excitation is one of those excitations. Wind excitation is involved in microtremor data for tower-like structures such as high rise stacks. It is necessary that damping ratios for high rise reinforced concrete stacks are calculated using data of removing wind excitation. The purpose of this study is to propose the method to remove wind excitation involved in microtremor data. And relationship between displacement amplitudes and first mode damping ratios is examined using data of removing wind excitation involved in microtremor data.
