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本文根据工程振动实测观察及结构地震模拟实验中的模态测量结果指出 ,通常的确定性弹性分析方法中 ,直接由构件的几何尺寸确定其刚度并进而确定结构的自振特性 ,进行结构的弹性反应分析和设计 ,其结果只能代表结构处于完全理想弹性状态时对外界激励的一种理论估计。由此提出了比较切合实际的基于强度及屈服变形的构件刚度的确定方法 ,进而指出在偏心结构的扭转振动研究中 ,结构的刚度偏心实际上依赖于强度偏心 ,并不能随研究者的意愿随意调整。
In this paper, according to the observation results of engineering vibration and the results of modal measurements in structural seismic simulation experiments, it is pointed out that in the usual method of deterministic elasticity analysis, the stiffness of the structure is determined directly and the natural vibration characteristics of the structure are determined. Response analysis and design, the results can only represent a theoretical estimate of the external incentive when the structure is in a perfectly ideal state of elasticity. Therefore, a more realistic method of determining the stiffness of members based on strength and yield deformation is put forward. Furthermore, it is pointed out that in the torsional vibration study of eccentric structures, the structural eccentricity of the structure actually depends on the strength eccentricity and can not be arbitrary with the wishes of the researchers Adjustment.