Method for establishing cement-based material fatigue failure probability and fatigue strain probability model capable of considering loading frequency

A cement-based material, fatigue failure technology, used in special data processing applications, instruments, electrical digital data processing, etc.

Active Publication Date: 2017-01-04
ZHEJIANG UNIV
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  • Method for establishing cement-based material fatigue failure probability and fatigue strain probability model capable of considering loading frequency
  • Method for establishing cement-based material fatigue failure probability and fatigue strain probability model capable of considering loading frequency
  • Method for establishing cement-based material fatigue failure probability and fatigue strain probability model capable of considering loading frequency

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[0026] 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.

[0027] The uniaxial compression fatigue test of four loading frequencies was carried out on the sample of the ultra-high toughness cement-based material, and the quasi-static loading compressive strength of the material was 30.2 MPa. Fatigue test The stress level is 0.85, the stress ratio R is 0.1, and the loading frequency is 8 Hz, 2 Hz, 0.5 Hz, 0.125 Hz, and the fatigue failure strain corresponding to the maximum load of the sample under each loading frequency is obtained. A quasi-static uniaxial compression test is performed on the cement-based material to obtain the strain at the same stress level as the fatigue test on the descending section of the stress-strain curve. The above strai...

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Abstract

The invention discloses a method for establishing a cement-based material fatigue failure probability and fatigue strain probability model capable of considering loading frequency. On the basis of the quasi-static loading failure strain of the cement-based material and the fatigue failure strain of the cement-based material under different loading frequencies, the cement-based material fatigue strain probability model can be conveniently and quickly obtained. On one hand, the model can predict the cement-based material and the fatigue failure probability of a structure which uses the cement-based material through fatigue strain, on the other hand, the fatigue strain of the cement-based material and the fatigue strain of the structure are calculated through the setting of the fatigue failure probability, and a new approach and a new method are provided for the service condition detection and assessment of the structure under the fatigue performance design and the fatigue loading of the corresponding structure.

Description

technical field [0001] The invention patent belongs to the technical field of cement-based material fatigue probability model. Background technique [0002] Cement-based materials are engineering materials that use cement as the cementitious material. Since the advent of Portland cement in the 19th century, concrete and other cement substrates have been widely used in transportation, construction, water conservancy, marine and other engineering fields, and are the most used materials 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 cement-based 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, the fatigue performance of cement-based materials and their str...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 李庆华徐世烺黄博滔
Owner ZHEJIANG UNIV
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