环境随机激励下七层底层框架—混凝土多孔砖结构动力特性分析

Analysis of dynamic characteristics of seven-story ground floor frame—porous concrete brick structure under environmental stochastic excitation

结构动力特性对结构总体刚度和内在力学性能的分析具有重要作用。本文通过对七层底层框架—混凝土多孔砖结构进行环境随机激励振动试验,并通过模态试验分析系统实测了结构的动力特性参数;然后通过ANSYS建模分析出了该结构理论的动力特性参数。通过两者的比较即可分析出结构的内在力学性能。得出结论:结构动力特性研究对结构内在力学性能和抗震性能分析提供了有益参考,试验方法简单,数据精确,便于实际工程应用。

The dynamic characteristics of structures play important roles in the analysis of overall stiffness and intrinsic mechanical properties of structures. In this paper, a random vibration excitation test of the framework of the seven-story frame-perforated concrete brick was carried out, and the dynamic characteristic parameters of the struc- ture were measured through the modal test analysis system. Then the dynamic characteristic parameters of the struc- ture were analyzed through ANSYS modeling, and by comparing the two, the intrinsic mechanical properties of the structure can be analyzed. It is concluded in this paper that, the study on dynamic characteristics of the structure provides a useful reference to the analysis of the inherent mechanical properties and seismic performance of the structure. The test method is simple, the data are accurate, and it is convenient for practical engineering applications.