Experimental investigation of small-scaled model for powerhouse dam section on shaking table

摘要

On the basis of the similitude law, Emulation Concrete, which meets the similitude requirements, was used for smallscaledndam model test. For the dynamic failure mechanism of concrete gravity dam during earthquake to be studied,nthe dynamic model test on the shaking table was conducted for a powerhouse dam section. The reservoir and rigidnfoundation systems were considered in the test. The whole process of concrete gravity dam from elastic deformation,ndamage, to failure in various levels of Peak Ground Acceleration is studied through the tests. The failure mode of gravityndam is simulated, and the influencing factors are then analyzed by numerical method, which is based on concretennonlinear elasto-plastic model of damage mechanics. The analytical results are compared with experimental results.nThe damage patterns obtained fromthe numericalmodel are in good agreementwith those obtained fromshaking tablentests including water reservoir effect and rigid foundation. Copyright © 2012 John Wiley & Sons, Ltd.