摘要
对超高层建筑空间巨型框架的结构分析提供了一种新的简化分析模型(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),利用这种模型分析了上部结构、基础、地基的共同工作。又对二级框架梁、柱考虑其弯曲刚度作为巨型柱的剪切型弹性地基得出了改进的简化分析模型,其计算精度与精确解很接近。在此基础上考虑了基础结构,并考虑了地基的弹性变形,建立了由巨型文克勒弹性地基梁和巨型剪切型弹性地基柱组成的空间巨型框架与其基础、地基共同工作的模型,并通过算例进行分析计算。计算结果表明:共同工作的分析模型是合理的、可行的,从而为超高层建筑巨型框架与其基础地基的整体共同工作分析提供了一种可行的简化方法,并给出了几点对此类结构的初步设计有指导意义的结论。
A new simplified analytical model was developed for structural analysis of the space frame of super tall buildings, in which the axial rigidity of subsidiary columns within the space frame is idealized continuously as Winlder elastic subgrade along the axes of the mega beams. The interactions between the subgrade - foundation and the superstructure were analyzed. Afterwards a more reasonable model was presented, in which the mega columns were also simplified as members with shear-typed elastic subgrade obtained by bending rigidity of the subsidiary frames within the mega frames. Based on these models and considering the foundation and the subgrade, this paper presents an improved analytical model for the interactions between the subgrade and the foundation and the superstructure composed of the Winkler-elastic-subgrade beams and the shear-typed elastic-subgrade columns. It is observed through computing example that the improved interaction-model is reasonable. A practicable simplified method for the global static analysis of the super tall buildings with space frames is thus investigated. Some significant conclusions are as well presented so as to propose a suggestion to conceptual design of super tall buildings with space frames.
出处
《工程力学》
EI
CSCD
北大核心
2008年第2期110-115,121,共7页
Engineering Mechanics
基金
河南省重点学科基金项目(504906)
