The Stochastic Seismic Response Analysis on Nonlinear Pile-Soil-Structure Interaction System with Uncertain Parameters

Abstract:

In order to solve the problem of the analysis of seismic response for nonlinear pile-soil-structure interaction system with uncertain parameters subjected to stochastic external excitation, a simple and practical method was proposed in this paper, and the corresponding plug-in program was developed on the platform of universal software ANSYS. Firstly, the stochastic vibration analysis was converted into the definite harmonic vibration analysis accurately by means of the pseudo-excitation method. Secondly, perturbation theory of small parameter was introduced to consider the uncertain material parameters and direct interpolation equivalent linearization model was used to simulate the nonlinearity of material. Finally, the effects of the variability of shear modulus, damping ratio, density and Poisson’s ratio on the stochastic seismic response of the pile-soil-structure interaction system are studied. The results show that the variability coefficients of the response have the same magnitude as the input material parameters and the influence of the variability of material parameters on the response magnitude can’t be ignored.

• Periodical: Advanced Materials Research (Volumes 243-249)
• Pages: 3940-3944
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.243-249.3940
• Online since: May 2011
• Authors: Ai Hong Zhou, Ying Yuan, Ji Hua Chen
• Keywords: Perturbation Method, Pseudo-Excitation Method, Stochastic Earthquake, Structure with Uncertain Parameter

References

[1] Z. G. Wu: Journal of Hydraulic Engineering, No.10 (1991), (In Chinese)

[2] S. H. Chen: Vibration Theory of Random Parameter Structure, edited by Jilin Science and Techno1ogy Press, Changchun (1992), (In Chinese)

[3] J. Li: World Earthquake Engineering, No.2 (1993), p.1, (In Chinese)

[4] I. Igusa and A. D. Kiureghian: Journal of Engineering Mechanics, Vol.114, No.5 (1988), p.812

[5] C. Lee and R. Singh: Journal of Sound and Vibration, Vol.174, No.3 (1994), p.395

[6] S. H.Chen, Z. S. Liu and Z. F. Zhang: Computers & Structures, Vol.43, No.4 (1992), p.681, (In Chinese)

[7] J. H. Lin, P.Yi: Journal of Computational Mechanics, Vol.18, No.4, (2001), p.402, (In Chinese)

[8] J. H. Lin, Y. H. Zhang: Pseudo-Excitation Method for Random Vibration (Science Press, Beijing 2004), (In Chinese)

[9] Q. Chen, X. B. Liu: Stochastic Finite Element Method and Engineering Application (Southwest Jiaotong University Press, Xi'an 1993), (In Chinese)

[10] Z. G. Wu: Journal of Vibration Engineering, Vol.3, No.1, (1990), p.56, (In Chinese)

[11] A. H. Zhou, Y.Yuan, H. R. Zhang, J. H. Chen: The International Symposium on Environmental Vibrations, ISEV 2009 (In Chinese) (2009), (In Chinese)

[12] R. R. Hu, Y. Y. Wang: World Earthquake Engineering, No.4 (2006), (In Chinese)