DAMAGE IDENTIFICATION ANALYSIS OF BRIDGE BEAM WITH SPACED SUPPORTS AS QUASI-PERIODIC STRUCTURE
Bridge is a typical periodic support structure in engineering, Because of earthquake, manufacturing error and long-term operation, supports including rubber bearing and pier can be damaged, and then stiffness and damping of supports are reduced.That essentially changes the original dynamic characteristics of the period-support bridge, and modal localization is an important feature of the dynamics due to the support quasi periodicity.The modal localization results in a large vibration displacement of local bridge, so that the damage degree and location of the bridge can be identified.It is a new and important way to identify damage of bridge supports through modal localization.In this paper, the bridge is considered as a period-support beam structure, and the modal localization features of the bridge as quasi-periodic support beam are studied.The relationship between modal localization and support damage is revealed, which provides a theoretical basis for the damage identification of bridges based on the modal localization features of quasi-periodic structures.
Spaced-support bridge Support damage Quasi-period Modal localization
Lei KANG Zu-guang YING
Department of Mechanics, School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China
国际会议
The 2017 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2017全国压电和声波理论及器件技术研讨会)
成都
英文
439-443
2017-10-27（万方平台首次上网日期，不代表论文的发表时间）