Recycled concrete mesomechanics parameter inversion method based on genetic algorithm
A technology of meso-mechanical parameters and recycled concrete, which is applied in the fields of genetic laws, genetic models, electrical digital data processing, etc. Convenience, reduced time and effort, improved computing efficiency
Pending Publication Date: 2021-06-29
BEIJING UNIV OF TECH
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Problems solved by technology
The method proposed by the present invention solves the problem that the traditional artificial inversion method of the mesomechanical parameters of recycled concrete consumes a lot of time and energy for scholars and the obtained mesomechanical parameters are generally not the optimal solution
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[0025] In order to enable those skilled in the art to better understand the technical solutions in the present description, the technical solutions in the embodiments of the present description will be clearly and completely described below in conjunction with specific embodiments and accompanying drawings.
[0026] S1: Retrieve the mechanical test results of recycled concrete through MATLAB, see the attached figure 2 ;
[0027] S2: Based on the preset range of mesomechanical parameters of recycled concrete, determine the value range of each parameter inversion. The value range is shown in the following table:
[0028]
[0029] S3: Build a genetic algorithm framework in MATLAB, determine the optimization objective function, and iteratively generate various mesoscopic mechanical parameters. The genetic algorithm optimization parameters are the elastic modulus of the five mesoscopic component materials and the corresponding reduction coefficients of the two interface transit...
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The invention discloses a recycled concrete mesomechanics parameter inversion method based on a genetic algorithm, and belongs to the field of recycled concrete mesomechanics numerical computation. The method includes the following steps: constructing an MATLAB-PYTHON-ABAQUS joint simulation interaction platform, taking the absolute difference value of a called test result curve and a finite element calculation result curve as a target function, carrying out optimization solution on the target function by applying a genetic algorithm, and carrying out continuous iteration to obtain a minimum value of the target function, so that infinite approximation of an experimental result and a finite element result is realized, and each group of mesomechanical parameters capable of accurately representing the recycled concrete in a corresponding experiment is obtained. According to the method, interaction of various kinds of software is flexibly applied, the modeling, calculation, result extraction, data feedback and iterative inversion integrated interaction process is achieved, and great convenience and practicability are provided for recycled concrete mesoscopic numerical calculation. Compared with manual parameter inversion in a traditional method, the method has the advantages that the manual workload and the working efficiency of traditional inversion are greatly reduced, and the accuracy of parameter inversion is remarkably improved.
Description
technical field [0001] The invention belongs to the technical field of concrete mesoscopic numerical calculation, and in particular relates to a genetic algorithm-based inversion method for regenerated concrete mesomechanical parameters. Background technique [0002] At the mesoscopic level, recycled concrete is considered to be a five-phase heterogeneous material composed of cement mortar, cement mortar-old cement mortar interface transition zone, old cement mortar, old cement mortar-aggregate interface transition zone, and aggregate. When the mesoscopic numerical analysis of recycled concrete is carried out, there are many mesoscopic composition parameters that need to be determined, which makes the mesoscopic simulation of recycled concrete extremely complicated. Moreover, due to the limitation of the existing experimental technology level, the mesoscopic material constitutive of the recycled concrete interface transition zone and the old mortar cannot be obtained by expe...
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IPC IPC(8): G06F30/13G06F30/23G06N3/12G06F119/14
CPCG06F30/13G06F30/23G06N3/126G06F2119/14
Inventor 周宏元周后湛王小娟崔浩儒
Owner BEIJING UNIV OF TECH