巨—子型控制结构体系在竖向地震作用下的响应分析

【作者】 薛荣刚；

【导师】 张洵安；

【作者基本信息】 西北工业大学 ， 结构工程， 2006， 硕士

【摘要】 巨-子型控制结构体系是一种新的超高层建筑结构形式,它是随着结构工程的发展和控制理论研究的深入,综合利用巨型框架特有的二级结构形式和结构控制的基本思想而提出的,具有良好的自振动控制功能。 本文从理论推导、算例分析、参数优化等方面对巨-子型控制结构进行了深入研究,并对结构形式进行了改进,提出了改进的巨-子型控制结构体系。 本文建立了在竖向地震作用下,巨-子型控制结构体系的串并联质点系计算模型,运用有限元方法推导了结构动力方程,并进一步对动力方程各矩阵进行凝聚,得到了巨-子型控制结构体系在竖向地震作用下的简化动力方程。运用复模态方法,详细推导了在非平稳竖向地震作用下,巨-子型控制结构体系在频域内的动力响应表达式,并以同本东京市政一号楼为基本模型,研究探讨了这种新型结构体系在竖向地震作用下的动力特性:对巨-子型控制结构体系及其改进形式进行了时程对比分析;然后进一步重点分析了在竖向地震作用下,附加柱数量、巨型梁刚度以及子结构层数等参数对改进的巨-子型控制结构体系动力响应的影响。结果表明:改进的巨-子型控制结构体系与原巨-子型控制结构体系相比,不但可以解决巨型梁层的大跨度问题,而且在竖向地震作用下具有较好的控制效果;附加柱数量、巨型梁刚度以及子结构层数等参数对改进的巨-子型控制结构体系的动力响应均有较显著的影响。最后本文还对巨梁层结构单元的设计进行了相关讨论。 本文所得结论为进一步丰富对巨-子型控制结构体系的研究提供了参考依据,并对工程实践具有一定的参考价值。更多还原

【Abstract】 Mega-sub controlled structural system is a new kind of super tall building structure configuration, it appears with the development of the structural engineering and the control theory, through synthesizing the special form of Mega frame structures which is made up of two classes frames and the basic thought of the control theory. It has the function of self vibration control.This paper takes work on the theoretic deduction, numerical analysis, and parameter optimization to study the Mega-sub controlled structural system. Based on the conclusion, a reformative structural form is introduced, and it is named Reformative Mega-sub controlled structural system in this paper.The member analytical model is adopted in the paper. Then this paper establishes the dynamic equation of the Mega-sub controlled structural system under the vertical non-stationary seismic action, and condenses the dynamic equation with static force cohesion method. Based on the complex mode theory, this paper gains the expression of dynamic response of the system under the vertical non-stationary seismic action. Choosing the municipal No. 1 building of Tokyo City as a calculating example, this paper analyses the dynamic characteristics of the system under vertical seismic action. The results of time history analysis show that Reformative Mega-sub controlled structural system have the better control effectiveness in comparison with the customary Mega-sub controlled structural system. Then this paper chiefly analyses the effects of the additional columns numbers, mega-beam stiffness and sub-frame floor numbers on the responses of Reformative Mega-sub controlled structural system under the vertical non-stationary seismic action, and the results show that the effects of these parameters on the responses of Reformative Mega-sub controlled structural system are very remarkable. At last, this paper discusses the design for the mega beam floor.The conclusion of this paper develops the research on the Mega-sub controlled structural system, and has some reference value to the actual engineering.更多还原