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《Shanxi Architecture》 2013-01
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Modal analysis on steel tube concrete arch bridge under environment excitation

ZHANG Min1 ZHAO Qing2 HUANG Li1(1.Water Conservancy and Civil Engineering College,South China Agricultural University,Guangzhou 510640,China; 2.Guangzhou Rongbaisheng Building Structure Design Office,Guangzhou 510640,China)  
According to a steel tube concrete arch bridge,through the white noise signal simulation environment excitation,combining with stochastic subspace method gained arch bridge modal parameters,and contrasted to peak value method,explained that the stochastic subspace method under environment excitation could only identify the structural modal frequencies and damping ratios,but also accurately extract the structure modal vibration mode,suitable for modal analysis on large complex structure.
【Fund】: 国家自然科学基金项目(项目编号:50678099);; 国家青年自然科学基金项目(项目编号:51008129)
【CateGory Index】: U448.34
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