Optical fiber sensing method for detecting stress change of concrete structure
A concrete structure and stress sensing technology, which is applied in the direction of force measurement, measurement force, measurement device, etc. by measuring the change of optical properties of materials when they are stressed, and can solve the problem of inability to detect concrete stress, prone to breakage, and stress detection. The reliability of the measurement results of the data is insufficient, so as to achieve the effect of high reliability and easy understanding of the detection results.
Pending Publication Date: 2020-06-23
南京智慧基础设施技术研究院有限公司
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Problems solved by technology
[0004] Aiming at the deficiencies of the prior art, the present invention provides an optical fiber sensing method for detecting the stress change of the concrete structure, which solves the problem that the existing method of detecting the stress change of the concrete structure generally uses optical fiber sensing in the detection process proposed in the above-mentioned background technology. method, but the existing optical fiber sensing method cannot protect the optical fiber pre-embedded in the concrete during operation, and the position where the optical fiber leads out of the concrete is prone to breakage, and the distribution range of the optical fiber during stress detection is small. It is not possible to perform sufficient stress detection on different heights and different positions of concrete, resulting in insufficient reliability of the measurement results of stress detection data
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[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the specific embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.
[0025] The present invention provides a technical solution: an optical fiber sensing method for detecting stress changes in concrete structures, comprising the following specific steps:
[0026] (1) laying stress sensing optical fiber
[0027] The stress-sensing optical fiber is preset into the concrete, and two layers of stress-detecting surfaces are set at different heights. When laying, each cross-section is laid horizontally, and two stress-sensing optical fibers are symmetrically arranged in the horizontal and vertical directions, so that The stress-sensing optical fibers in the transverse and longitudinal directions intersect perpendicularly;
[0028] The stress-s...
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The invention discloses an optical fiber sensing method for detecting a stress change of a concrete structure, relates to the technical field of concrete structure stress detection, and particularly relates to an optical fiber sensing method for detecting the stress change of the concrete structure. The method comprises the steps of laying a stress sensing optical fiber; setting a stress change measuring point; setting a stress sensing optical fiber protection measure; leading out the stress sensing optical fiber at aside edge position of concrete; and detecting stress data and calculating thestress data. By using the optical fiber sensing method for detecting the stress change of the concrete structure, in the process of laying the stress sensing optical fiber, two layers of stress detection surfaces are arranged at different height positions so that the stresses at the different height positions can be conveniently detected so that sufficient stress detection data can be obtained; in addition, the four groups of stress sensing optical fibers distributed in the shape like the Chinese character ''jing'' can comprehensively detect transverse stress changes and longitudinal stress changes on the same detection surface, and reliability of detection results is high.
Description
technical field [0001] The invention relates to the technical field of stress detection of concrete structures, in particular to an optical fiber sensing method for detecting stress changes of concrete structures. Background technique [0002] Concrete (concrete, stone vector) is a general term for composite materials made of gel material, aggregate and water in an appropriate proportion, and then hardened after a certain period of time. It is the most widely used artificial civil construction material in the world. In the process of concrete construction, in order to ensure the quality of concrete, it is necessary to perform stress change detection. Stress detection generally refers to the process of building structures, such as steel structure installation, unloading, transformation, reinforcement, concrete pouring and other processes. The monitoring instrument is a technical means of monitoring the stress change of the stressed structure. When the monitoring value is clos...
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IPC IPC(8): G01L1/24
CPCG01L1/242
Inventor 郝品山黄志刚
Owner 南京智慧基础设施技术研究院有限公司