According to the rules of stress release and stress adjustment of structure under lowfrequency cyclic earthquake action

this paper introduces dynamic contact element and adopts ground motion time histroy of El Centro to study contact nonlinear problem about dynamic contact analysis method for towering structure

comparatively analyzes the difference between etastic contact and dynamic contact methods

discusses dynamic behavior and response influence rule of intake tower interaction system.This method was used for Zipingpu 1#intake tower under action of "5.12" Wenchuan earthquake loads.Results show that considering the dynamic contact is more consistent with the actual condition of intake tower under earthquake loads

the displacement

velocity and acceleration depend more on the character of the foundation

and have little effect from the change of superstructure stiffness

the overall stability of tower can be guaranteed which accords with field check results after earthquake.Therefore

using dynamic contact method to research intake tower-rock mass combined dynamic interaction is very necessary.