Research on dynamic damage of gravity dam considering concrete strength inhomogeneity
The mass concrete used in gravity dam is easy to lead to inhomogeneity of strength due to its inherent characteristics,construction quality and other reasons.In the current seismic analysis of concrete dams,concrete is generally regarded as a material with uniform strength distribution,but there are few studies on the influence of strength inhomogeneity on dam dynamic damage.Based on the plastic damage theory of concrete and the probability distribution model of Weibull,Python language is used to redevelop ABAQUS.On the premise of considering the plastic damage of concrete,the influence of random inhomogeneity distribution of concrete strength on the damage of gravity dam body and bedrock is studied.The dynamic damage of dam and bedrock,the interaction between dam and reservoir water,and the radiation damping of infinite foundation are comprehensively considered in calculation.The dynamic responses of dam and bedrock after earthquakes,such as damage area distribution,damage area ratio and damage dissipation energy,are compared and analyzed.The influences of inhomogeneity concrete strength on dam and bedrock seismic damage are revealed.The research results can provide reference for the design and construction of gravity dam.
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