Mechanical Analysis and Numerical Simulation of Steel-Ring and Rigid-Frame Restrained Concrete

Abstract

The complicated counterbalance system of steel ring and concrete-ring，rigid-frame and concrete-plate was analyzed and simplified under the restrain deformation and strains. The material parameters of early-age concrete are measured. Based on these work, the corresponding mechanical models were established and a special tool was employed for the meshing of model, and then, internal stress and strain induced by shrinkage of early-age concrete on restrained conditions were studied by FEM. The self-induced tensile stresses and strains in the restrain concrete can be calibrated，on the basis of which the elastic strains and tensile stresses would be calculated. So, the results of the numerical simulation reveal the law of the stress and strain distribution perfectly. It is significant to contrast the restraint characters of steel-ring and rigid-frame. The early-age shrinkage behaviors can be studied in depth.