建筑结构学报2013，Vol.34Issue(6)：22-29,8.
厦门沿海某超高层建筑结构风致振动动力特性研究
Study on wind-induced vibration characteristics of coastal high-rise building in Xiamen
摘要
Abstract
The field measurement is a reliable approach to get the dynamic characteristics of a structure.By full-scale measurement,the structural dynamic characteristics of a high-rise building in Xiamen were obtained when typhoon landed,which included the acceleration data of six levels,the natural frequency and the vibration models.Meanwhile,the random decrement method was adopted to extract the damping ratios corresponding to the first three modes of the frequency on the basis of the measured data.It is indicated that,the value of the damping ratios for the first mode in two directions are about 7％ due to the significant wind-induced structural response resulted from the large wind speed.Moreover,the damping ratios for the first mode increase nonlinearly with the increase of the acceleration.Furthermore,the finite element 3D model was established by ANSYS to analyze the dynamic characteristics of the studied building,which agreed with the identified results from field measurement very well.Therefore,the finite element 3 D model has been confirmed to be reasonable.关键词
高层建筑/风致振动/原型实测/有限元分析/动力特性/随机减量法Key words
high-rise building/ wind-induced vibration/ full-scale measurement/ finite element analysis/ dynamic characteristics/ random decrement method分类
建筑与水利引用本文复制引用
李正农,潘月月,桑冲,史文海..厦门沿海某超高层建筑结构风致振动动力特性研究[J].建筑结构学报,2013,34(6):22-29,8.基金项目
国家自然科学基金重大研究计划项目(91215302),国家自然科学基金项目(51008237,51178180). （91215302）
