Prediction Of Long-term Subgrade Deformation
Under Cyclic Loadings With The Implicit-explicit
Transition Method Using Finite Elements
Author(s)
K. Zhuang, G. Quanmei & W. Yang
Abstract
Calculating accumulated soil deformation caused by millions of cyclic loadings
with finite element simulating calculation is usually limited by storage space and
physical error accumulation. The implicit method with which the constitutive
relation of soil can be well described in fact cannot satisfy the finite element
calculation on millions of times of cyclic loadings. With the research on the
long-term deformation of soil under cyclic loadings, it is evident that this process
has a similar character with the process of creep deformation of materials. In
addition, the two experience expressions describing the two deformation process
are also analogues. Based on these, a new idea to forecast soil deformation under
high accumulated cyclic loadings is proposed in this paper. With this idea, the
time-wasting and space-wasting problems in finite element calculation
implementation is solved. Comparing the finite element calculation results and
the dynamic triaxial experiment results, the accuracy of the idea is proved. With
the comparison between the practical measured results of detection on highspeed
railway section and finite element calculation results, the idea is further
proved that it can represent the regularity and tendency of soil deformation under
long-term cyclic loadings on a high-speed railway.
Keywords: high-speed railway, cyclic loadings, deformation prediction, finite
element simulating calculation.
Keywords
high-speed railway, cyclic loadings, deformation prediction, finiteelement simulating calculation.
Related Book
Other papers in this volume
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