Identification method for dynamic constitutive parameters of concrete materials based on reverse calculation

A technology of parameter identification and calculation inversion, applied in the direction of analyzing materials, instruments, measuring devices, etc., can solve a large number of test and testing problems, improve efficiency and accuracy, reduce times and costs, and avoid stress wave effects and strain rate effects. Effects of Decoupling Problems
CN103344482AActive Publication Date: 2013-10-09HUNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN UNIV
Publication Date
2013-10-09

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Abstract

The invention discloses an identification method for dynamic constitutive parameters of concrete materials based on reverse calculation. According to the identification method, a separating type Hopkinson pressure bar (SHPB (Split Hopkinson Pressure Bar)) test of concrete and a corresponding finite element analytical model are comprehensively utilized, a minimum error function corresponding to reflected waves and transmitted waves which are subjected to test measurement and numerical calculation is taken as a reverse calculation object function, and a group of dynamic constitutive parameters of the concrete materials are identified by carrying out searching and evaluation based on an optimized reverse calculation method; the constitutive parameters of the concrete materials can be fast acquired only by carrying out SHPB tests for several times, meanwhile, decoupling problems of an stress wave effect and a strain rate effect are avoided, and the structural response and the material response do not need to be separated; the parameters which are difficult to confirm in a conventional method can be accurately and effectively acquired, the number of times and the cost of physical tests are greatly reduced, and the practical value is relatively good.
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Description

technical field

[0001] The invention belongs to the technical field of material property identification, and in particular relates to a method for identifying dynamic constitutive parameters of concrete materials based on calculation reverse calculation. Background technique

[0002] Concrete is a special composite material, which has excellent properties such as easy forming, durability, and strong bearing capacity, as well as the advantages of abundant raw materials, economic benefits, and suitable for building structures of any size and complex shape. It is used in housing, airport runways and It is widely used in various civil engineering and military facilities such as nuclear power plants. Concrete materials are mainly composed of cement mortar, aggregate and bonding layer. Due to the obvious difference in physical and mechanical properties of cement mortar and aggregate, the irregular shape and uncertain distribution of aggregate, the dynamic mechanical properties of ...

Claims

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