Catastrophic Analysis of Seismic Response of Gravity Dam Sliding along Base Surface
For the instability problem of gravity dam sliding along base surface, cubic nonlinear constitutive model of soft material in base surface is adopted, which is usually expressed by Weibull model. Dynamic Equations of dam sliding along base surface is established. By means of catastrophe theory, the jumping and hysteresis phenomena of the vibration amplitude of the dam is analyzed, the parameter range of stable region in which amplitude doesn’t happen catastrophe is given and the factors which cause amplitude instability are discussed. The results obtained in the paper are of significant value for understanding the sliding instability mechanism of gravity dam under earthquake, as well as guiding the design of gravity dams.
D. B. Sun and Q. W. Ren, "Catastrophic Analysis of Seismic Response of Gravity Dam Sliding along Base Surface", Advanced Materials Research, Vols. 311-313, pp. 2164-2168, 2011