地基基础刚度变化对超高层建筑自振特性的影响  

Inflence of rigid differentia of the foundation on the free vibration of the mega frame structure

作　　者：谢向东[1] 孙洪鑫[2] 

机构地区：[1]襄樊学院土木工程系,湖北襄樊441053 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《西安建筑科技大学学报（自然科学版）》2007年第3期402-407,413,共7页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：襄樊学院科学研究计划基金项目(KJ04027)

摘　　要：近年来我国地基基础技术不断发展,各种新技术、新工艺不断开发和推广应用.随着地基基础技术不断发展,我国超高层建筑逐渐兴起,而在结构的选型上,由于巨型框架结构有很强的优越性,所以在超高层建筑结构中得到了很好的应用.鉴于此,以超高层建筑空间巨型框架结构为例,把超高层建筑空间巨型框架结构与其基础等效连续化为一个半无限大弹性地基上的加劲薄壁筒组合体,用半解析法对其进行了自由振动分析计算;讨论了地基基础刚度变化对超高层建筑结构自由振动特性的影响,得出了一些很有价值的结论.In recent years, with the technology development of the subgrade or the foundation in China, the tall buildings are developing rapidly. So it is very important to research the interactions between subgrade and foundation and superstructure. The mega-frame structures possess strong superiority. So in the paper, the infldence of free vibration differentia on tall building space-mega-frame structure caused by changing-rigid of the subgrade or the foundation is discussed with the numerical example of a tall building space-mega-frame structure by semi-analytical approach based on ODE（Ordinary Differential Equation） Solver, And some valuable conclusions are drawn through analyzing the reasonable results of the numerical example.

关 键 词：高层建筑 空间巨型框架 地基与基础 刚度变化 自由振动 半解析法 常微分方程求解器 

分 类 号：TU973.2[建筑科学—结构工程]