超高层建筑空间巨型框架的地基、基础、上部结构共同工作的简化振动分析  被引量:1

Simplified free vibaration analysis considering interactions between subgrade and foundation and superstructure of super tall buidings with space mega frame

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作  者:龚耀清[1] 吴华芹[2] 甄静水[3] 

机构地区:[1]河南理工大学土木工程学院,河南焦作454003 [2]河南省化学工业学校,河南郑州450042 [3]宁夏大学土木与水利工程学院,宁夏银川750021

出  处:《河南理工大学学报(自然科学版)》2007年第3期322-328,共7页Journal of Henan Polytechnic University(Natural Science)

基  金:教育部科学技术重点项目(00260);河南省重点学科基金资助项目(504906)

摘  要:为超高层建筑空间巨型框架建立了一种新的简化计算模型——半无限大弹性地基-空间杆系-层模型,它由半无限大弹性地基、巨型文克勒弹性地基梁和巨型剪切型弹性地基柱组成(二级框架柱考虑其轴向刚度作为巨型梁的文克勒弹性地基;二级框架梁、柱考虑其弯曲刚度作为巨型柱的剪切型弹性地基),可同时考虑基础结构和上部结构的刚度变化以及地基的弹性变形.算例计算结果表明,新的简化振动分析模型是合理、可行的,可为超高层建筑巨型框架的整体动力特性分析提供一种可行的简化方法,对此类结构的抗震设计具有指导意义.A new simplified computing model, which is her-storey model, has been developed for free vibration semiinfinite-elastic-subgrade-space - memanalysis of super tall buildings with space mega frames. The model is composed of semiinfinite-elastic-subgrade, the mega beams with Winkler elastic support resulted from the idealization of the axial rigidity of auxiliary columns along the axes of the beams, and the mega columns with shear-typed elastic support obtained by the simplification of the bending rigidity of the subsidiary frames within the mega frames. The stiffness changes of the foundation and the superstructure as well as the subgrade is taken into account in the model. Computing examples results show that the new model is reasonable and advisable, given a practicable simplified method for the global dynamic analysis of the super tall building with space mega frames, and propose a suggestion to aseismic design of super tall buildings with space mega frames.

关 键 词:超高层建筑 空间巨型框架 自由振动分析 半无限大弹性地基 半无限大弹性地基-空间杆系-层模型 地基-基础-上部结构共同工作 

分 类 号:TU973.23[建筑科学—结构工程]

 

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