We present a new method to model fracture of concrete based on energy minimisation.The concrete is considered on the mesoscale as composite consisting of cement paste,aggregates and micro pores.In this first step,the ...We present a new method to model fracture of concrete based on energy minimisation.The concrete is considered on the mesoscale as composite consisting of cement paste,aggregates and micro pores.In this first step,the alkali-silica reaction is taken into account through damage mechanics though the process is more complex involving thermo-hygro-chemo-mechanical reaction.We use a non-local damage model that ensures the wellposedness of the boundary value problem(BVP).In contrast to existing methods,the interactions between degrees of freedom evolve with the damage evolutions.Numerical results are compared to analytical and experimental results and show good agreement.展开更多
文摘We present a new method to model fracture of concrete based on energy minimisation.The concrete is considered on the mesoscale as composite consisting of cement paste,aggregates and micro pores.In this first step,the alkali-silica reaction is taken into account through damage mechanics though the process is more complex involving thermo-hygro-chemo-mechanical reaction.We use a non-local damage model that ensures the wellposedness of the boundary value problem(BVP).In contrast to existing methods,the interactions between degrees of freedom evolve with the damage evolutions.Numerical results are compared to analytical and experimental results and show good agreement.
