During the long-term service of concrete structures, cracks are commonly present and difficult to avoid due to multiple factors such as material properties, environmental effects, design and construction, and usage loads.
As a key load-bearing component in building structures, the appearance and development of cracks in beams are particularly noteworthy.
These cracks not only affect the aesthetics and functional use of buildings, but more importantly, as important external manifestations of the deterioration of the internal state of the structure, their shape, distribution, width, and development trend directly affect the overall integrity, durability, and even load-bearing safety of the structure.
Minor cracks may accelerate the invasion of moisture and harmful media, causing internal steel reinforcement corrosion and expansion, resulting in the peeling of concrete protective layer, reduction of effective cross-section, and ultimately significantly reducing the stiffness and bearing capacity of components.
In severe cases, it may induce brittle failure or structural failure, posing a potential threat to the safety of building use.
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