钢筋混凝土框架结构复模态试验分析

The complex modal test analysis of RC frame structure

通过一个钢筋混凝土空间框架模型的振动模态试验,分析讨论钢筋混凝土框架结构的模态性质、由实模态替代引起的误差以及哪种实模态提取方法更合适.结果显示,钢筋混凝土框架模型表现出了复模态的特征;其中用复留数相位提取的实模态最接近复模态.

Modal tests of a reinforced concrete （RC） space frame structural model in lab are presented in this paper. The modal character, the error of the substituting by real modes and the best way to extract real modes from complex modes are discussed. It showed the complex modal character of the RC frame model, and also indicated that the real modes extracted by the complex modal phase are most similar to the complex modes.