Simplified Prediction Method of Wind-induced response of Base-isolated Tall building using LRB

Abstract

It is becoming increasingly important to carry out wind resistance design for base-isolated tall buildings. Otherwise, the wind-induced response of base-isolated building, using lead-plugged rubber bearings (LRB), predicted by the hysteresis model of an isolator for seismic response analysis has a large error, because the creep and re-crystallizations of LRB's lead portion caused by dynamic motion having static component. Therefore, a convenient method is proposed for estimating base-isolated-tall-building responses to strong winds, which comprise slowly- and quickly- varying components. This method proposed with considering of the experimental results for a LRB subjected to four types of ideal wind loads, show that the LRB brings one-side horizontal deformation with fluctuation, accompanied with creep and re-crystallizations of LRB's lead portion. And the last, comparing the dynamic tests results and the predicted results by the proposed method, the property of the proposed method is verified.