Transfer Function Deformation Mechanism Due to Wind Force Effect on Buildings During Microtremors

Abstract

and with soil − s童 mct 肛 e interaction has advantages and disadvantages ． The advantages are th 飢 the vibration modes and dynamic characteristics of the buildings themselves ca 皿 be obIained under sma11 wind velociIy conditions ． A disadvanlage is thaUhe wind fbrce defbrms 山e spectral ratio． ． This paper describes a study ofthis phenomena ． Three factors were studied ：the existence ofupper input f6rces ， simultaneousupper and lower input situation ， and relation ( dependence or independence)between two input forces ． Fu 曲 ermore ， it was explained maIhematica 且 ly that 山 e relative magnitudes ofbase move ［nenIs due Io the upper and lower i皿 put fbrces control this phenomena ．