TITLE:
Chebyshev Spectral Element Analysis for Pore-Pressure of ERDs during Construction Period
AUTHORS:
Chujia Zhou, Mingyuan Chang, Nansheng Li
KEYWORDS:
Spectral Element Method (SEM), Chebyshev Series, Earth-Rockfilled Dams (ERD), Rolling Compaction, Pore-Pressure
JOURNAL NAME:
World Journal of Engineering and Technology,
Vol.6 No.2,
May
25,
2018
ABSTRACT: Chebyshev spectral elements are applied to dissipation analysis of pore-pressure of roller compaction earth-rockfilled dams (ERD) during their construction. Nevertheless, the conventional finite element, for its excellent adaptability to complex geometrical configuration, is the most common way of spatial discretization for the pore-pressure solution of ERDs now [1]. The spectral element method, by means of the spectral isoparametric transformation, surmounts the disadvantages of disposing with complex geometry. According to the illustration of numerical examples, one can conclude that the spectral element methods have the following obvious advantages: 1) large spectral elements can be used in spectral element methods for the domains of homogeneous material; 2) in the application of large spectral elements to spatial discretization, only a few leading terms of Chebyshev interpolation polynomial are taken to arrive at the solutions of better accuracy; 3) spectral element methods have excellent convergence as well-known. Spectral method also is used to integrate the evolution equation in time to avoid the limitation of conditional stability of time-history integration