Test mold for corrosion of reinforced concrete and stress monitoring method for corrosion process

Abstract

The invention provides a test mold for corrosion of reinforced concrete and a stress monitoring method for a corrosion process. The stress monitoring method comprises the following steps: firstly, producing an experimental test mold which takes a concrete test sample with reinforcing steel bars as a main part, wherein a micro-strain gage with a wire is arranged inside the reinforcing steel bar; secondly, enabling a CCD camera and a strain acquisition instrument to be communicated for respectively monitoring the outer part and the inner part of a reinforced concrete specimen; obtaining a strainvalue of the reinforced concrete specimen by processing and conversing of a digital image correlation system. The monitoring method has the advantages of lower requirements on measuring environment and vibration isolation, high controllability and short cycle of finishing single test; the reinforced concrete specimen has the advantages of easiness in processing and preparation, small occupied space, low cost and simple preparation; in addition, full-field real-time monitoring of the corrosion in the whole life cycle of a reinforced concrete specimen structure can be carried out, and an overall macroscopic model can be obtained. The stress monitoring method for the corrosion process, disclosed by the invention, can be carried out in a laboratory, or can be combined with engineering practice for real-time monitoring, and provides a novel measurement method for structural safety evaluation.

Description

technical field [0001] The invention belongs to the technical field of monitoring the corrosion process of reinforced concrete, and relates to a monitoring method, in particular to a test mold for the corrosion of reinforced concrete and a stress monitoring method in the corrosion process. Background technique [0002] At present, there are the following methods for non-destructive testing in the corrosion process of reinforced concrete: manual observation method, ultrasonic detection method, radar detection method, acoustic emission (AE) detection method, infrared thermal image detection and optical measurement method, etc., as follows: [0003] The manual observation method is to draw the visual inspection results into a sketch, and measure the crack width with a crack scale and a magnifying glass, which requires a lot of manpower and time, and the accuracy is not high; [0004] Ultrasonic detection method is to reflect the compressive strength of concrete by using the rel...

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Problems solved by technology

[0008] Although the above existing methods can obtain information on cracks in reinforced concrete structures, they require a lot of manpower and material resources, and are limited to the image of external factors such as terrain and location. It is even more difficult to capture micro-cracks caused by fires and bursts. The method of macroscopic fracture mechanics for mechanical analysis and safety assessment of damaged concrete structures requires an accurate description of the crack information in various stages of the concrete structure, and then establishes a mechanical analysis model. However, the traditional crack collection workload is large and the collection The information is rough

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