[1186] Geometric parameters relating corrosion penetration to surface crack width
キーワード：corrosion penetration, rbsm, surface crack width, surface deformation area
This study aims to clarify the decisive geometric parameters relating corrosion penetration to surface crack width. The corrosion-induced crack propagation was simulated using the Rigid Body Spring Method considering varying geometric parameters of concrete sections, and regression analysis of the simulation results was performed. It was found that the deformation area of concrete surface has a great influence on surface cracking. For a certain type of concrete material, the critical corrosion penetration producing visible surface crack can be expressed in a linear form in terms of the cover-to-bar diameter ratio and the width of surface deformation area. On the other hand, the growth rate of crack width is linearly proportional to the ratio of cover to the width of surface deformation area.