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Date of Publication:2012-01-01

Journal:大连理工大学学报

Affiliation of Author(s):建设工程学部

Volume:52

Issue:6

Page Number:850-854

ISSN No.:1000-8608

Abstract:Based on the scaled boundary finite element method (SBFEM), a
   transmitting boundary for the structure-unbounded foundation interaction
   analysis in frequency domain is established. The Sommerfeld radiation
   condition at infinity is satisfied exactly. It has the advantages that
   the high-order terms are evaluated recursively for unbounded domain
   stiffness matrix to match with the requirements of accuracy, so it can
   be conveniently applied to solving practical engineering problems.
   Features of several approximate models developed in the literatures are
   investigated. The dynamic response of gravity dam with unbounded
   foundation is calculated as an example, the lingering effect of the
   unbounded foundation on the earthquake response of the dam is analyzed.
   The experimental results show that the dynamic stress modeled by
   non-mass foundation overestimates the earthquake response of the dam by
   15% and the maximum stress considering the effect of the lingering
   effect is more than that of no lingering effect by 25%.

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