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Method for establishing cement-based material fatigue failure model and fatigue strain probability model by considering stress level

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

Active Publication Date: 2016-12-21
ZHEJIANG UNIV
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Problems solved by technology

However, there is no relevant research report on the probability distribution of fatigue strain of cement-based materials.

Method used

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  • Method for establishing cement-based material fatigue failure model and fatigue strain probability model by considering stress level
  • Method for establishing cement-based material fatigue failure model and fatigue strain probability model by considering stress level
  • Method for establishing cement-based material fatigue failure model and fatigue strain probability model by considering stress level

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Embodiment Construction

[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 three stress levels was carried out on the sample of the ultra-high toughness cement-based material, and the average value of the compressive strength of the material under quasi-static loading was 42.3 MPa. Fatigue test The stress ratio R is 0.1, the loading frequency is 4Hz, and the stress levels are 0.90, 0.80, 0.70 respectively, and the fatigue failure strain of the sample under each stress level is obtained. A quasi-static uniaxial compression test is performed on the cement-based material to obtain the failure strain under quasi-static loading. The above strains are shown in the table below:

[0028]

[0029] Get the proportional pa...

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Abstract

The present invention discloses a method for establishing a cement-based material fatigue failure model and a fatigue strain probability model by considering a stress level. A fatigue strain probability model of a cement-based material may be conveniently and fast obtained based on quasi-static loading failure strain of the cement-based material and fatigue failure strain at different stress levels. On one hand, the model may be used to predict, by using fatigue strain, a fatigue failure probability of the cement-based material and a structure using the cement-based material, and on the other hand, fatigue strain of the cement-based material and a structure may be calculated by setting the fatigue failure probability, to provide a new approach and a new method for a fatigue performance design of a corresponding structure and service condition detection and assessment of a fatigue loading 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...

Claims

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Application Information

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