考虑地基基础影响的巨型框架半解析静力分析

Semi-analytical static analysis of mega frames with considering the effects of base and foundation

根据刚度等效原理,将超高层建筑空间巨型框架的上部结构与基础等效连续化为一个加劲薄壁筒体,以此作为空间巨型框架结构的简化分析模型,并用半解析法对受静力作用的空间巨型框架结构进行了分析计算.计算结果表明,这种简化分析方法是合理的,与不考虑地基基础对上部结构影响的模型相比,这种简化分析模型也更接近空间巨型框架结构的实际受力情况,因此,可以用于初步设计阶段或整体性能评价阶段对空间巨型框架结构的简化分析.

Based on the principle of stiffness equivalence, the upper structure and foundation of a super high-rise building with spatial mage frame structure is simplified equivalently and continuously to a combination structure of stiffened-thin-wailed tube, which is regarded as the simplified analysis model of spatial mage frame structure. After that, a spatial mage frame structure that is subjected to static loads is analyzed and calculated by semi-analytical method with this model. The computed results show that the simplified analysis method is effective and reasonable. Compared with the mode! of none-considering the base and foundation＇s effects to upper structure, the simplified analysis mode! is more close to the real working condition of spatial mage frame structures. So the presented simplified analysis in this paper can be used for spatial mage frame structures in the phase of initial design or total performance evaluation.