Concrete creep has become one of the major problems that threatens concrete structural\ndevelopment and construction. However, a reasonable and accurate calculation model for\nnumerical analysis is the key to control and solve the creep deformation of concrete. To better\ndescribe the concrete nonlinear creep damage evolution rule, the visco-elasticity Plasticity\nRheological Theory, Riemann Liouville Theory and Combined Model Theory are quoted, and the\nAble dashpot is used to reconstruct fractional-order soft-body composite elements to propose the\nexpression of the stress-strain relationship of the elastomer, visco-elasticity plasticity body, and\nViscoplasticity body, considering the evolution of the concrete compression damage process. A\nnonlinear creep damage constitutive model of concrete, based on fractional calculus theory, is\nconducted, and the parameters of the specific calculation method of the model are given................
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