A method and apparatus for predicting fatigue life of concrete based on Weibull equation and residual deformation

A technology of fatigue life prediction and residual deformation, applied in the direction of instruments, design optimization/simulation, computer-aided design, etc., can solve the problems of complex model form and difficulty in popularization and application, and achieve the reduction of calculation amount, simplification of testing equipment, and simple steps Effect

Active Publication Date: 2019-03-26
ZHEJIANG UNIV
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Problems solved by technology

Existing models usually require multiple parameters including fatigue strain, fatigue stress, elastic modulus, and material fitting parameters. The model form is relatively complex, and generally requires iterative calculations, so it is difficult to popularize and apply it in engineering construction.

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  • A method and apparatus for predicting fatigue life of concrete based on Weibull equation and residual deformation
  • A method and apparatus for predicting fatigue life of concrete based on Weibull equation and residual deformation
  • A method and apparatus for predicting fatigue life of concrete based on Weibull equation and residual deformation

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Embodiment Construction

[0021] The specific implementation of the technical solution provided by the present invention will be further described below in conjunction with the accompanying drawings. This implementation example is an illustration of the present invention, rather than limiting the present invention.

[0022] In this embodiment, the prediction of compression fatigue life and the characterization of fatigue deformation evolution law will be performed on three fiber concrete samples with stress levels of 0.85, 0.80 and 0.75 respectively.

[0023] For the same concrete material, λ p / k p can be set to the same value. Therefore, in this embodiment, a compression fatigue test with a stress level of 0.90 is first performed on three samples of the same fiber concrete to obtain the λ p / k p The average value as described is set to the same value. The compression fatigue test obtained respectively 15 residual deformations ε of the 3 samples p And the number of fatigue load cycles n (as shown...

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Abstract

The invention discloses a method and apparatus for predicting fatigue life of concrete based on Weibull equation and residual deformation. In the developing field of modern civil engineering, the fatigue behavior of concrete has become one of the focuses of attention. How to accurately predict the fatigue life of concrete has become an important problem in the field of engineering construction. The method and device provided by the invention can be used for life prediction of concrete under fatigue load and characterization of fatigue deformation evolution law. The invention has the advantagesof simple steps, easy use and high precision. The calculation amount can be greatly reduced in use, and only two fatigue parameters, the number of fatigue load cycles n and the residual deformation Epsilon p of the nth cycle, can be measured, which simplifies the testing equipment. The model can provide important technical support for the whole process of engineering design, construction, testingand maintenance.

Description

technical field [0001] The invention belongs to the technical field of concrete fatigue life prediction. Background technique [0002] Since the advent of Portland cement in the 19th century, concrete has been widely used in transportation, construction, water conservancy, marine and other engineering fields, and is the most used material in engineering construction. At the beginning of the 20th century, with the construction and development of reinforced concrete bridges, related research on the fatigue performance of concrete materials was gradually carried out. Since the 21st century, with the construction of large-scale infrastructure such as highways, high-speed railways, super high-rise buildings, super-high dams, sea-crossing bridges, and ocean platforms, concrete structures are facing more complex and harsh conditions such as cyclic loads and alternating environments. Conditions of service. On the other hand, the further development of concrete structure design the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F17/11
CPCG06F17/11G06F2119/04G06F30/17G06F30/20G06F2111/10
Inventor 黄博滔李庆华徐世烺
Owner ZHEJIANG UNIV
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