TITLE:
Apply of Explicit Finite Element in Seismic Ground Motion Computation
AUTHORS:
Yuzhu Bai, Xiwei Xu
KEYWORDS:
Finite-Element Method; Fault; Ground Motion; Tangshan Earthquake
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.1 No.6,
November
28,
2013
ABSTRACT:
In this paper, we will use the explicit finite element
to compute ground motion due to Tangshan
earthquake. The explicit finite-element method uses one integration point and
an hourglass control scheme. We implement the coarse-grain method in a
structured finite-element mesh straightforwardly. At the same time, we also
apply the coarse-grain method to a widely used, slightly unstructured
finite-element mesh, where unstructured finite elements are only used in the vertical
velocity transition zones. By the finite-element methods, we can compute the
ground velocity with some distance to the seismogenic fault in Tangshan earthquake.
Through the computation, we can find the main character of ground motion for
the strike slip earthquake events and the high frequency vibration motion of
ground motion.