Seismic response of arch dams considering infinite radiation damping and
joint opening effects
Liu Xinjia (刘新佳)†, Xu Yanjie (徐艳杰)‡, Wang
Guanglun (王光纶)§ and Zhang Chuhan (张楚汉)§
Department of Hydraulic Engineering ,Tsinghua University, Beijing 100084,
China
Abstract: Effects of two important factors on earthquake response of
high arch dams are considered and combined into one program. These factors are:
effects of radiation damping of the infinite canyon and local non-linearity of
the contraction joint opening between the dam monoliths. For modeling of rock
canyon, the discrete parameters are obtained based on a curve fitting, thus
allowing the nonlinear dam system to be solved in the time domain. The
earthquake uniform free-field input at the dam-canyon interface is used. An
engineering example is given to demonstrate the significant effects of the
radiation damping on the structure response.
Keywords: arch dams; dam-canyon interaction; radiation damping; joint
opening; local nonlinearity
