A method for establish a mathematical model of damage rate evolution of recycled concrete under freeze-thaw condition

A technology of recycled concrete and mathematical models, applied in electrical digital data processing, design optimization/simulation, special data processing applications, etc. The effect of cost, simple understanding of formula and accurate conclusion

Inactive Publication Date: 2019-03-15
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

In the past, the research on the freeze-thaw damage trend of concrete had to collect multiple index data and conduct experiments, which took a lot of time and energy, and most of the reasons for the freeze-thaw damage trend of concrete were inferred by observing the different experimental phenomena. Lack of theoretical basis, not accurate, clear enough, not convincing enough

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  • A method for establish a mathematical model of damage rate evolution of recycled concrete under freeze-thaw condition
  • A method for establish a mathematical model of damage rate evolution of recycled concrete under freeze-thaw condition
  • A method for establish a mathematical model of damage rate evolution of recycled concrete under freeze-thaw condition

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Embodiment Construction

[0022] In order to make the technical means, creative features, goals and effects of the present invention easy to understand, the following examples will specifically illustrate a method of establishing a mathematical model of the damage rate evolution of recycled concrete under freeze-thaw conditions in conjunction with the accompanying drawings.

[0023] Material damage is manifested as the degree of damage to the appearance or interior of the object, which can be described as the generation of tiny cracks or voids for some reason, making the effective area that bears a certain load smaller. Damage mechanics can be used to analyze deformable solids with continuous defects. The research methods can be roughly divided into three types: metal physics methods, macroscopic phenomenological methods and statistical methods. The premise of using damage mechanics to study the test object is to determine a variable that can describe the damage process, that is, the damage variable. W...

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Abstract

The invention relates to a method for establishing a mathematical model of damage rate evolution of recycled concrete under freeze-thaw, Because of the application of damage mechanics, The freeze-thawdamage degree of recycled concrete is defined by dynamic elastic modulus, and the freeze-thaw damage experiment of recycled concrete is designed. Then the relationship model between freeze-thaw damage degree of recycled concrete and different freeze-thaw cycles is established by quick freezing method, and the damage rate evolution mathematical model of recycled concrete under freeze-thaw is obtained. Therefore, the method for establishing a mathematical model of damage rate evolution of recycled concrete under freezing and thawing is based on macroscopic damage mechanics theory, and has a solid mechanics theory foundation compared with previous research methods, and the result accords with objective law and mechanics principle, and the conclusion obtained is accurate, clear and convincing. Compared with the previous research methods, the process of the damage rate evolution mathematical model established by the invention is controllable, the period is short, and the time and the costare greatly saved.

Description

technical field [0001] The invention belongs to the field of concrete materials, and in particular relates to a method for establishing a damage rate evolution mathematical model of recycled concrete under freeze-thaw conditions. Background technique [0002] With the research and development of damage mechanics by scholars at home and abroad, damage mechanics has become a powerful tool for studying material damage, and it is used in damage analysis, mechanical property prediction, life estimation, and material toughening. The existing damage mechanics is mainly applied to the constitutive model of rock and the damage mechanics analysis of metals. However, the application of damage mechanics to concrete freeze-thaw damage is relatively seldom. In the past, the research on the freeze-thaw damage trend of concrete had to collect multiple index data and conduct experiments, which took a lot of time and energy, and most of the reasons for the freeze-thaw damage trend of concret...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 李德宝李振华树明亮陈小燕
Owner UNIV OF SHANGHAI FOR SCI & TECH
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