Device and experimental method for simulating coupling effect of seawater erosion and axial tensile load on concrete

Abstract

The invention relates to the technical field of buildings, in particular to a device and an experimental method for simulating a coupling effect of seawater erosion and axial tensile load on concrete,and is suitable for a concrete durability test technology. The device comprises a fixed rigid frame, the fixed rigid frame is provided with a lever type axial stretching mechanism for axially stretching a columnar concrete test piece, the columnar concrete test piece is provided with a water tank of which the open end is hermetically connected with the side surface of the columnar concrete test piece, and the water tank is provided with a seawater erosion simulating mechanism for simulating seawater erosion. According to the device, the lever loading principle is utilized, seawater erosion issimulated, long-term axial stretching is kept, stress relaxation is avoided, and the coupling effect of seawater erosion and axial stretching loads on concrete is simulated.

Description

technical field [0001] The invention relates to the field of construction technology, in particular to a device and an experimental method for simulating the coupling action of seawater erosion and axial tensile load on concrete, which is suitable for concrete durability testing technology. Background technique [0002] Concrete structures used in coastal or marine environments are often subject to a combination of loading and seawater erosion. In such a complex environment, the durability of concrete cannot reach a normal level. Especially in the tension area of ​​the concrete structure, its ability to resist seawater erosion is weakened. The current research mainly focuses on simulating the marine environment to conduct erosion tests on concrete. The test results may cause the overestimation of the anti-corrosion performance of concrete, resulting in premature structural damage. Therefore, it is extremely important to carry out research on the influence of axial load and...

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Problems solved by technology

[0004] At home and abroad, there are certain studies on the durability of concrete under the action of tensile stress, which mainly focus on the research under the action of bending load. Stretch is a test at a high stress level, due to the stress relaxation characteristics of the spring, causing errors in the test

Some scholars also use a fast chloride ion permeation device to measure the chloride ion permeability coefficient under the action of stretching, but this does not truly reflect the chloride ion permeation behavior under the action of the actual dry-wet cycle. From the currently collected literature, there is no relevant Scholars proposed a similar device, but it is of great significance to evaluate the durability of concrete structures

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