Identification of Loads on Suspenders in Bridges Based on Measured Response Data in Time Domain

Abstract:

Article Preview

The purpose of this paper is to deal with identification of loads on suspenders. Values of the load at every moment were chose as identification parameters, and the objective function was established using measured data of responses and corresponding simulated ones. The vibration differential equation of suspenders was adopted to obtain the formula of relationship between the load and acceleration responses with superposition method. Furthermore, a regularization technique was applied in identification calculations to improve ill-posedness of the problem to be solved. With a tied arch bridge as the real example, the load on one of its suspenders was identified. Results of identification showed that the simulated data of acceleration response were almost identical to measured ones, which indicated validity of the proposed method.

Info:

Periodical:

Edited by:

Chunliang Zhang and Paul P. Lin

Pages:

1640-1644

Citation:

L. T. Zhang and Y. F. Zhang, "Identification of Loads on Suspenders in Bridges Based on Measured Response Data in Time Domain", Applied Mechanics and Materials, Vols. 226-228, pp. 1640-1644, 2012

Online since:

November 2012

Export:

Price:

$38.00

[1] G.M. Yan. Modern Suspension Bridges. (China Communications Press, P. R. China 2001). (in Chinese).

[2] X.D. Shao. Bridges Engineering. (China Communications Press, P. R. China 2003). (in Chinese).

[3] J.H. Lin and Y.H. Zhang. Pseudo-excitation Method of Random Vibration. (Science Press, P. R. China 2004). (in Chinese).

[4] F.C. Li, S.Z. Tian and J.P. Ou: Analysis of Precision and Error of Cable Force Identification of Cable-stayed Bridge. Journal of Harbin Institute of Technology, Vol. 18 (2011) No. 2, p.91.

[5] S.W. Doebling, C.R. Farrar and M.B. Prime: A Summary Review of Vibration-based Damage Identification Methods. The Shock and Vibration Digest, Vol. 30 (1998) No. 2, p.91.

DOI: https://doi.org/10.1177/058310249803000201

[6] H. Sohn, C.R. Farrar, F.M. Hemez, et al: A Review of Structural Health Monitoring Literature: 1996-2001. Los Alamos National Laboratory Report, LA-13976-MS, (2003).

[7] S.W. Doebling, C.R. Farrar: The State of the Art in Structural Identification of Constructed Facilities. A report by the ASCE Committee on Structural Identification of Constructed Facilities, (1999).

[8] G.R. Liu and X. Han. Computational Inverse Techniques in Nondestructive Evaluation. (CRC Press, America 2003).

[9] R.W. Clough and J. Penzien. Dynamics of Structures. (Computers & Structures, Inc, America 1995).

[10] R. Fletcher. Practical Methods of Optimization. (Science and Technology Translation Press in Tianjin, P. R. China 1990). (in Chinese).

[11] G.H. Golub and C.F. Loan. Matrix Computations. (the John Hopkins University Press, Britain 1996).