论混凝土破坏的尺寸效应

SIZE EFFECT OF CONCRETE FAILURE

本文考虑混凝土破坏的骨料和试件尺寸效应，通过引人非局部体力场，研究了非均质材料的断裂与内部相互作用，并根据流变断裂学的方法和原理，探讨了外部物理量与内部相互作用的依赖关系，从而把断裂与裂纹体内部结构有机地结合起来．在此基础上将混凝土视为非均匀材料，以其骨料的最大粒径的倍数作为相互作用的有效范围，通过混凝土破坏试验，研究混凝土骨料对断裂特性的影响和混凝土断裂的尺寸效应．

At the background of the effects of the aggregate of concrtet failure and sample size,and by introducting non-local bodyforce field,based on the method and principle of rheological fracture, in this paper,the author researches the fracture and internal coaction of heterogeneous materials,and approaches the relying relation between the external physical quantity and internal coaction from general angle, therefore organically combines the fracture with the internal structure of crack body.On this basis,regarding concrete as haterogeneous material,and taking the multiple of the largest diameter among its aggregates as the effective scope of coaction,through the experiments on concrete failure,the author has researched the influence on fracture property by concrete aggregate and the size effect of concrete fracture.