Research on Modal Identification Method of Pre-Stressed Concrete Bridge

Abstract:

To study validity of power spectrum density peak method which be used to identified modal parameter of concrete bridge under ambient excitation, number simulation of one Pre-stressed concrete bridge is carried out.3D model of the bridge is established by FEM software , FEM analysis and time-history analysis of 3D model of PC continuous beam bridge are carried out.During the simulation,practical factors such as acceleration measuring and white noise are taken into account. In the only case of the output signal modal parameter of bridge can be identified. Six-order modal parameters of the structure are identified by the number simulation which the average error is less than 5%. It is revealed that power spectrum density peak method is suitable for bridges monitoring and diagnosis, with important practical engineering application value.

• Periodical: Applied Mechanics and Materials (Volumes 405-408)
• Pages: 1651-1654
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.405-408.1651
• Online since: September 2013
• Authors: Hao Jiang, Guang Wei Meng, Hai Kuo Zhang
• Keywords: Ambient Excitation, Modal Parameter Identification, Power Spectrum Density Peak Method, Pre-Stressed Concrete Bridge

References

[1] Yu Fanhua, Liu Hanbing. Structural damage identification by support vector machine and particle swarm algorithm [J]. Journal of Jilin University (Engineering and Technology Edition), 2008, 38 (2): 0434-0438.

[2] Yu Fanhua, Liu Hanbing, Tan Guojin. Application of neural network ensemble for structural damage detection [J]. Journal of Jilin University (Engineering and Technology Edition), 2007,  37 (2): 0438-0441.

[3] A. Alvandia, C. Cremona. Assessment of vibration-based damage identification techniques [J]. Journal of Sound and Vibration, 2006, (292): 179-202.

DOI: 10.1016/j.jsv.2005.07.036

[4] Jong Jae Lee, Chung Bangyun. Damage diagnosis of steel girder bridges using ambient vibration data [J]. Engineering Structures, 2006, (28): 912-925.

DOI: 10.1016/j.engstruct.2005.10.017

[5] Chen Changsong, Tian Zhongchu. Long-span pre-stressed concrete cable-stayed bridge modal test technology research[J]Civil engineering journal, 2005，38(10)：72-75.

[6] Wang Gang, Yao Qianfeng. Environmental excitation frame structure modal identification method[J]Industrial buildings. 2004, 34(12): 45-47.

[7] Xu Xiuzhong, Hua Hongxing, Chen Zhaoneng. Based on the environmental incentive modal parameter identification method were reviewed[J]. Vibration and impact. 2002, 21(3): 1-5.

[8] Wang Liya, Meng Guangwei, Chen Jiezhong, Incentive of the linear structural system local stiffness parameter identification[J]. Journal of Jilin university(engineering edition)2006, 36 (01): 0001-0004.

[9] J. S. Bendat, A. G. Piersol. Engineering Applications of Correlation and Spectral Analysis{m}. 2nd edition. New York: John Wiley, 1980: 167-179.