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rate-independent and rate dependent model, Fig. 12 shows that distribution of equivalent plastic
strain rate calculated by the rate dependent model.
CONCLUSIONS
A modified three-parameter William-Wamke consistency viscoplastic model is proposed to
investigate the strain-rate effects on the seismic response of arch dams. It is shown that the rate
dependent analyses alter the stress distribution over the dam body and lead to an increased
maximum tensile stress. These effects should be taken into consideration in the safety assessment of
arch dams located in high seismic area.
A CKNO WLEDGEMENT
This research was founded by the National Science Foundation of China under grant No. 50139010 and No. 59739180.
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