基于相似理论的钢筋混凝土建筑结构振动模态

Study on vibration mode of reinforced concrete building structures based on similarity theory

以三层钢筋混凝土建筑结构为研究对象,将其简化为3自由度的弹簧—质量振动系统,用相似理论建立振动系统的实验模型,制作等效的建筑结构实验模型.用传递函数响应方法对实验模型进行动态响应实验研究,测得振动系统的固有频率和振型,掌握振动系统的动态特性,为钢筋混凝土建筑的结构设计和系统减振设计提供动力学的实验测试方法,尤其给安装在建筑物内机械设备的振动控制提供了设计依据.

The three-tier reinforced concrete building structure is discussed as a study object, and the building structure is simplified to 3-DOF spring-mass vibration system, the experiment model parameter of the vibration system is built up on similarity theory and the experiment model equivalent to building structure is designed. The dynamic response of the experiment model is studied by transfer function response, and the natural frequency and vibration mode of the vibration system are measured, the dynamic characteristic is nastered, which provides the experiment test method of dynamic data for the structure design of reinforced concrete and the shock absorber design of the system, especially provides the design rules to vibration control of the machine equipment which are built in the building structure.