半刚性楼盖空间结构变-扭振动分析

实测数据表明,多种类型楼盖的水平刚度是有限的。对于非对称空间结构在水平干扰下的振动分析,应该考虑屋盖和楼盖水平变形的影响,采用“水平变形-扭转”耦联振动理论,以取代习用的“平移-扭转”振动理论;并采用“串并联质点系”或“立体质点系”作为结构振动分析的力学模型,以取代“串联刚片系”力学模型。本文提出的振动新理论,既适用于房屋结构,也适用于其他结构。

Torsional Vibration Analysis of Spatial Structures with Semi-Rigid Floorings

It is proved by earthquake damages and surveying data of buildings that the horizontal stiffness of the floor slabs of several structural types is not infinite. For asymmetric spatial structures, the influence of the horizontal deformation of floor slabs under the action of horizontal force has to be considered in the vibration analysis of the structures. In this paper,the theory of deformation-torsion coupling vibration is proposed to substitute for the current translation-torsion coupling vibration theory,and the series-parallel mass-point system or the spatial mass-point system is proposed as the mechanic model in the vibration analysis of asymmetric spatial structures instead of the series mass point system.