Research on Relationship of Dynamic Calculation Parameters and Deformation

Abstract:

In order to analyze the effect of dynamic calculation parameters to subgrade deformation, cross-section in the Shanghai-Nanjing high-speed railway is chosen and the numerical simulation calculation method is applied. Through numerical calculation of 121 kinds of conditions combining dynamic shear modulus and dynamic damping ratio, the dynamic elastic deformation of point A and dynamic partial stress of bottom layer of foundation bed were studied. It shows that the maximum dynamic elastic deformation of point A reduces with dynamic shear modulus and dynamic damping ratio increasing. Moreover, the value of average dynamic partial stress augments with dynamic shear modulus increasing, and reduces along with the increase of dynamic damping ratio. Using nonlinear fitting method of constructing three polynomial surface equations, the function of total deformation with dynamic calculation parameters is obtained.

• Periodical: Applied Mechanics and Materials (Volumes 178-181)
• Pages: 1459-1462
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.178-181.1459
• Online since: May 2012
• Authors: Jian Yi Yuan, Tao Cheng, Ding Bang Zhang, Zhen Hua Wu, Jian Xiang
• Keywords: Deformation, Dynamic Calculation Parameter, Dynamic Damping Ratio, Dynamic Partial Stress, Dynamic Response, Dynamic Shear Modulus

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