METHOD FOR EFFECTIVELY RESTRAINING RESPONSE OF A STRUCTURE TO OUTSIDE DISTURBANCES AND APPARATUS THEREFOR

摘要

Abstract:The present invention is related to a method for restrainingresponse of a structure to outside disturbances such as winds andearthquakes etc. and an apparatus therefor. According to theinvention there is provided an apparatus which comprises (a) anenclosure defining an inner space thereby, (b) a liquid retainedin the enclosure and having a free surface, and (c) an obstaclemeans disposed in the enclosure for disturbing a flow of theliquid, whereby the liquid has at least one sloshing naturalfrequency and the obstacle means increases damping coefficientof the sloshing. According to the invention, there is alsoprovided a method which comprises the steps of (a) attaching atleast one enclosure to the structure, the enclosure defining aninner space, (b) attaching at least one obstacle means to theenclosure so that the obstacle is retained inside the enclosure,and (c) providing the enclosure with liquid so that a prescribedportion of the inner space filled with the liquid and the liquidhas a free surface, wherein dimensions of the enclosure and theamount of the liquid is so determined that a sloshing naturalfrequency of the liquid generally coincides with the naturalfrequency of the structure.