基于环境振动测试的桥梁柔性桥塔动力特性识别

摘要

The goal of this paper is to identify the bridge flexible tower dynamic properties. Technique & principle of dynamic properties identification for civil structure based on ambient vibration testing is expatiated. By a bridge flexible tower application example, the commonly approach, technique detail & realization process is analyzed. The dynamic properties for the example tower, is test & identified. The value of identification is nearly consistent with the value of bridge tower structure finite element (FE) theory analysis. This paper can be used as a technique reference for similar bridge tower dynamic properties testing.%针对桥梁柔性桥塔动力特性的识别问题,阐述了基于环境振动测试的结构动力特性识别技术与原理.结合某桥梁柔性桥塔工程实例,分析了该方法的一般步骤、技术细节和实现过程.测试、识别得到了实例桥塔的动力特性数据,该数据与桥塔结构有限元理论计算的结果基本一致.可为同类桥梁桥塔的动力特性测试提供技术借鉴和参考.