波動・振動

[I-04] NUMERICAL ANALYSIS ON NATURAL VIBRATION CHARACTERISTICS OF 5-SPAN CONTINUOUS PC RIGID-FRAME BOX GIRDER BRIDGE

*Vu Thanh¹、Komuro Masato¹、Kishi Norimitsu¹、Kawase Ryoji² (1. Muroran Institute of Technology、2. Koken Engineering Co.Ltd.)

This paper presents an investigation of the natural vibration characteristics of an actual five-span continuous PC rigid-frame box girder bridge. A numerical analysis method was conducted on the 3D finite element model of the bridge by using ABAQUS software to obtain dynamic characteristics. To investigate the damage level of the bridge, the results obtained from the analysis were compared to the experimental results, and concluding as follow: 1) The natural vibration frequencies and modes from the ambient vibration test were almost similar to the numerical analysis results, and 2) The natural vibration frequencies and modes of the undamaged bridge before the start of the operation were verified.