| Researches in the fiber reinforced complex materials have made rapid progresses since 1980'. Among all these materials, Steel-fiber concrete has been widely used because of its special high performance. Nowadays, the study on the mechanical problems in steel-fiber concrete has focused on the following aspects: the toughening and strengthening mechanism steel-fiber acted on concrete, the constitutive law and the research on the surface. The steel-fiber concrete is a kind of multiphase material. Its mechanical properties and damage rule are determined not only by the component performance, but also by its microscopic structural characteristics. Therefore, it is a new trend in steel-fiber concrete to establish an inherent relationship between the macroscopic mechanical properties and the component properties along with microscopic structural parameters by microscopic mechanics. In the present paper, combined with relevant experimental results and the application of elasticity, plasticity and complex material mechanics concerning the analysis on microscopic stress transfer mechanism in fiber composites, a theoretical model has been presented that the transfer between the fiber and the matrix surface in steel-fiber concrete under tension-compression stress. The distribution of friction, stress and displacement has been given between fiber and matrix. The present paper can provide useful references on the design of steel-fiber concrete complex. |
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