Nonlinear dynamic analysis of Dagangshan arch dam with considering damper reinforcement

A numerical model is developed based on the arch dam nonlinear dynamic analysis program ADAP-88 to simulate the strengthening performance of damper measurers installed in arch dams.With this program,analyses have been carried out on nonlinear dynamic responses of Dagangshan arch dam.The results illustrate that damper reinforcing measurers can only be functional to reduce contraction joint opening of the arch dam during strong earthquake,but it appears to have insufficient effect on the distribution of dam stresses.