摘要
目的研究具有埋入式基础的高层建筑考虑土-结构相互作用时的风振响应,为高层建筑的抗风设计提供理论依据.方法以埋入式基础的框架结构为例,建立了高层建筑的简化计算模型,导出结构的运动方程,进而对比分析了刚性地基和柔性地基条件下,土-结构相互作用对结构风振位移和加速度响应的影响.结果当结构高度达到15层时,弹性位移增幅已接近刚性位移的50%,再考虑结构摆动的转角和基础平移,总位移已显著大于刚性位移,达到刚性位移的2倍左右.结论考虑土-结构相互作用后,结构体系自振频率明显降低,结构总响应幅值总是大于刚性地基时的响应幅值;且在给定条件下,结构越高,地基越柔,影响越大;而基础埋深越大,影响则越小.
The purpose of this paper is to study the response of high-rise building with an embedded base to w ind-induced vibration considering soil-structure interaction（ SSI）,w hich is to provide theoretical proof for the w ind resistant design of the high-rise building. The method is that a simplified model of a high-rise building w ith an embedded base is proposed,as w ell as the structure motion equation is established. Based on this,the influence of soil structure interaction to the displacement and acceleration response aroused by w indinduced vibration is analyzed under rigid foundation and flexible foundation. The results figure out the quantitative relationship betw een the effect of SSI and w ind vibration effect. By considering the effect of SSI,the structure vibration frequency decreases significantly. The total response amplitude is alw ays greater than that w ithout considering SSI. And under given conditions,the higher structure height and the more flexible foundation is,the greater effect of the SSI w ill be. Also the effect of SSI goes smaller w ith the depth foundation increasing.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2014年第2期235-241,共7页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51178337)
江苏省高校教师境外研修项目
关键词
土-结构相互作用
高层建筑
埋入式基础
风振响应
soil-structural interaction
high-rise building
embedded base
wind-induced vibration response
