Research On The Dynamic Response Of Concrete Gravity Dam Under Earthquake And Landslide And Tsunami

In China,there are different degrees and forms of reservoir bank landslides or hidden da ngers in most of the reservoir areas under construction or already built,which are mainly caus ed by reservoir bank topography,geological structure,material composition,reservoir water l evel change,human activities and so on.In view of the fact that landslides may cause river ho wling to impact the dam at any time before,at the epicenter and at any time after the earthqua ke,the following research work has been carried out:(1)The koyna dam was selected as the numerical simulation prototype,the constitutive m odel of the material was determined,the determination method of the landslide river noise loa d in the current code was analyzed,the applicability of the formula to the actual disaster was j udged,and the landslide river noise load pressure model in this paper was studied and determi ned to prepare for the numerical simulation.(2)The reliability of the numerical simulation was verified by the pure ground motion co ndition,and on this basis,the dynamic response of the dam superimposed by the landslide riv er noise load pressure before,after and at the most adverse moment of the epicenter was analy zed by the untopped pressure model under the condition of untopped roof.(3)Analyze the dam dynamic response under the overtopping pressure mode,which is su perimposed by the landslide river noise load at the most adverse moments before,after and at the epicenter respectively.(4)Analyze the superposition of landslide river roar load of different heights at the most unfavorable moment of the epicenter,and explore the dynamic response of river roar wave hei ght to the dam.