Method for recognizing meso-structure parameter of dynamic performance of radiation shield concrete
A technology of mesoscopic parameters and identification methods, applied in the direction of material inspection products, etc., can solve the problem that it is difficult to obtain the dynamic mesoscopic parameters of the radiation-proof concrete interface
Inactive Publication Date: 2015-01-21
陈振富
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[0004] The purpose of the present invention is to provide a method for identifying the mesoscopic parameters of the dynamic performance of radiation-proof concrete, which solves the problem that it is difficult to obtain the dynamic mesoscopic parameters of the interface of radiation-proof concrete with existing testing techniques
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[0012] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0013] The present invention is based on the concrete random aggregate model, and the invention steps are as follows: figure 1 As shown, the barite concrete and magnetite concrete are discretized into a multiphase medium composed of heavy coarse aggregate, mortar and the joint surface of the two, and a mesoscopic numerical simulation model for studying the dynamic performance analysis of radiation-proof concrete is established. At the mesoscopic level, considering the different mechanical properties of the aggregate unit, the solidified cement mortar unit and the interface unit material, according to the parameters such as the density and dynamic elastic modulus of the heavy aggregate and its mortar obtained from the modal test, the radiation-proof concrete Analysis of frequency damping variation with three-phase material parameters.
[0014...
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The invention discloses a method for recognizing a meso-structure parameter of the dynamic performance of radiation shield concrete. The method comprises the following steps: manufacturing a modal test piece of radiation shield concrete and aggregate and mortar of the radiation shield concrete; carrying out modal testing and testing a transfer function of the test piece of the radiation shield concrete beam; carrying out modal testing, and testing a transfer function of the aggregate test piece corresponding to the radiation shield concrete beam; carrying out modal testing, and testing a transfer function of a mortar test piece corresponding to the radiation shield concrete beam; analyzing so as to obtain dynamic parameters of the radiation shield concrete beam, the aggregate and mortar of the radiation shield concrete beam; establishing a random aggregate model of the radiation shield concrete; and recognizing the interface dynamic meso-structure parameter of the radiation shield concrete. The method for recognizing the meso-structure parameter of the dynamic performance of the radiation shield concrete has the beneficial effects that the interface dynamic meso-structure parameter of the radiation shield concrete is obtained, such as damping and dynamic modulus of elasticity.
Description
technical field [0001] The invention belongs to the technical field of concrete performance testing, and relates to a method for identifying the mesoscopic parameters of the dynamic performance of radiation-proof concrete. Background technique [0002] The mechanical properties of concrete phase materials are the basis of numerical simulation. Due to the limitation of test conditions, the results of concrete mechanical tests often cannot reflect the material properties of the specimens, but can only reflect the structural properties of the entire specimen loading system. In the study of concrete multiphase mesomechanics, numerical simulation and material test complement each other, and the numerical simulation method that can explain some experimental phenomena and can stand the experimental verification can partially replace the test, thereby saving manpower and material resources, and reducing the limitations of the objective conditions of the test and human factors. [...
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IPC IPC(8): G01N33/38
Inventor 陈振富杨静甘元初陶秋旺刘君
Owner 陈振富