Study on Failure Criteria and Constitutive Relationships of High Strength and High Performance Concrete Applied to Steel Reinforced Concrete Composite Structures

摘要

The research of the constitutive relationships of concrete is one of the core problems to non-linear analysis of the concrete structures. The development of composite structures, especially the development of steel reinforced high-strength and high-performance concrete composite structures, should make the research more urgent. In order to seek for the failure criterion and constitutive relationships of high strength and high performance concrete applied to steel reinforced concrete composite structures, many related research results of domestic and oversea scholars are analyzed and summarized. Using statistical theory and knowledge of damage mechanics, the failure mechanism of material under load is analyzed, and the constitutive relationships of high strength and high performance concrete is deduced,which involves concrete damage variables on material properties. Based on damage experiment studies of material, the related coefficients in equations were defined. It even nears to the true characteristic of the concrete material,and facilitates engineering application.