论文部分内容阅读
超高层建筑共同作用系统的时变作用是相互耦合的,其计算是一个相互迭代,直至收敛的复杂过程。该问题主要涉及三部分内容,即地基基础沉降变形的时变性规律、上部结构的时变性规律和共同作用理论。另一方面,结构自振周期作为超高层建筑结构分析与设计的重要基本参数,其值不宜过短,也不宜过长,且需严格控制前三阶振型周期的比例。本文从地基沉降的时变性规律及上部结构的时变性规律出发,以时间切片的形式进行共同作用分析,综合考虑时变作用的耦合效应,采用共同作用时变效应分析方法,初步分析得到超高层建筑共同作用系统的时变性对结构周期的影响。分析结果表明,超高层建筑共同作用系统的时变性对结构前两阶振型的周期影响较大,与传统计算方法相比,周期会拉长1.25~1.4倍,这对于风、地震等水平荷载的影响较大,在工程实践中应引起重视。
The time-varying effect of the synergistic system in the super-tall buildings is coupled with each other, and the calculation is a complicated process from iteration to convergence. The problem mainly involves three parts, namely the time-dependent deformation settlement of subsoil foundation, the time-variation of superstructure and the theory of interaction. On the other hand, the natural vibration period of structure is an important basic parameter in the analysis and design of super high-rise building structure. Its value should not be too short or too long, and the proportion of the first three modes’ periods must be strictly controlled. Based on the time-varying regularity of subsidence and the time-varying law of superstructure, this paper analyzes the interaction effect of time-varying slices by considering the coupling effect of time-varying effect and the time-varying effect analysis method. The Influence of Time Variability of Building Synergy System on Structure Period. The analysis results show that the time-varying of the synergetic system of super high-rise buildings has a great influence on the period of the first two modes of the structure. Compared with the traditional calculation method, the period will be 1.25 ~ 1.4 times longer, which is good for horizontal loads such as wind and earthquake A greater impact, in engineering practice should pay attention.