Abstract
A convenient method is proposed for estimating base-isolated-tall-building responses to strong winds, which comprise slowly- and quickly- varying components Experimental results for a lead-plugged rubber bearing (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 To estimate such deformation, the proposed method assumes that only rubber portion is burden with the slowly-varying loads, the lead portion cannot resist slowly-varying loads but has influence of quickly-varying components, and simple sum of both brings peak deformation Thus, wind loads are first decomposed to slowly- and quickly-varying components Next, deformations to each component are computed by static and dynamic analyses, respectively Then, their sum is taken as peak deformation Analyses for an assumed tall building with the LRBs show that the estimated deformation must be misesteem unless creep deformation due to slowly-varying components is incorporated
