外部荷载作用下混凝土构件表面裂缝发展的标度律研究

Scaling law research on the crack development of the concrete member surface under external loads

通过混凝土四点弯曲梁的物理试验,验证了混凝土梁表面裂缝具有明显的统计意义上的分形特性,表明了采用分形手段研究混凝土表面裂缝的可行性.引入标度理论知识,研究了混凝土表面梁裂缝扩展的标度律,将标度理论应用于描述混凝土裂缝的发展情况,为混凝土结构的设计和维护提供了理论依据.

Through the physical experiment of four-point bending concrete beam,this paper verifies that the surface cracks of concrete beam has statistically fractal characteristics in significant sense,as shows the feasibility to take a fractal means for a study of the surface cracks.With the knowledge of scaling theory,it studies the scaling law of the crack in the surface of the concrete beam,uses the scaling theory to describe the development of cracks in concrete,and provides a theoretical basis for the design and maintenance of concrete structures.