巨、子结构质量比对新型有控建筑结构影响研究

新型有控建筑结构能够高效地控制其在脉动风载下的动力反应,它的巨、子结构质量比对其控振效果影响非常大,对这一问题进行深入研究。在以往研究新型有控建筑结构风振反应的某些特性时,将风载全部作用于巨结构,而对于巨、子结构同时承受风载的情形未曾考虑,有失新型有控建筑结构研究的全面性。综合讨论了新型有控建筑结构依靠巨结构独自承担风载及巨、子结构同时承担风载两种抗振方案,并研究了不同方案下,新型有控建筑结构风振反应随巨、子结构质量比不同而变化的规律。围绕着该问题,文中给出了新型有控建筑结构分析模型,介绍该结构动力参数矩阵组装方法及其动力特性分析方法。

Investigation in New Building Structure with Different Mass Ratio Between Mega- Structure And Sub-Structure

The dynamical response of the new controlled building structure, whose self-control function is closely related with the mass ratio between mega-structure and sub-structure, can be reduced effectively when acted by wind loads. In the previous research about the performance of the new controlled building structure, it was thought that wind loads are only inflicted on the mega-structure and not on the sub-structure. In fact, sub-structure may be exposed in the natural surroundings and receive wind force, so the two instances that winds loads act only on the mega-structure and on both the mega-structure and sub-structure should be both investigated to roundly understand the performance of the new controlled building structure. In the paper, the changing rules of the dynamical responses of the new structure are studied with different mass ratios between mega-structure and sub-structure under two forcing schemes, a new analytical model for the building structure is introduced, and the method to assemble the matrix of momentum, parameters is presented.