东南大学学报（自然科学版）2024，Vol.54Issue(4)：852-860,9.DOI:10.3969/j.issn.1001-0505.2024.04.007
基底隔震高层建筑风振响应和等效静风荷载
Wind-induced response and equivalent static wind load for base-isolated tall buildings
摘要
Abstract
Based on the wind load code for tall buildings,the equation of motion of the base-isolated tall building under wind load was established,and the root mean squares of structural wind-induced responses were derived.Taking three base-isolated tall buildings with different heights as study cases,the dynamic characteristics and along-wind responses of buildings before and after isolation were investigated.Similar to the formula for the equivalent static wind load(ESWL)of the fixed-base buildings,the corresponding ES-WL of the base-isolated buildings was proposed,where the simplified formula of wind-induced vibration fac-tor was modified.The results show that the modal frequency and damping ratio of the isolated building with the elastic isolation layer are reduced,and a clear drift at the isolation layer in mode shape is observed.Con-sequently,the structural response increases obviously compared with the fixed-base building.The simplified formula of the background factor of base-isolated buildings can accurately estimate the wind-induced vi-bration factor and also can be used for the calculation of the acceleration.This study provides a reference for the checking calculation of the wind-induced vibration for base-isolated tall buildings in the elastic range.关键词
高层建筑/基底隔震/风致响应/等效静风荷载/背景因子Key words
tall building/base isolation/wind-induced response/equivalent static wind load/background factor分类
建筑与水利引用本文复制引用
李志豪,黄国庆,周颖,杨庆山,杨旭东..基底隔震高层建筑风振响应和等效静风荷载[J].东南大学学报（自然科学版）,2024,54(4):852-860,9.基金项目
国家自然科学基金资助项目(52178456,51978107)、高等学校学科创新引智计划资助项目(B18062). （52178456,51978107）
