What are the causes of cracks in reinforced concrete components, and what are the reasons that affec

Ferroconcrete.

The crack width of the beam is at the maximum crack width limit or normal.

The presence of cracks is a common phenomenon in concrete structures. A large number of scientific research and practice have proved that cracks in concrete structures are inevitable, and the load is often 15% to 25% of the ultimate load.

Under the action of normal use load, reinforced concrete structure is generally working with cracks, and the crack range that is generally visible to the naked eye is, and the crack width is less than the harmless crack, and the influence on waterproofing, anti-corrosion and load-bearing can be negligible.

Summary. Hello dear, the crack width of the reinforced concrete beam is at the maximum crack width limit or normal.

The presence of cracks is a common phenomenon in concrete structures. A large number of scientific research and practice have proved that cracks in concrete structures are inevitable, and the load is often 15% to 25% of the ultimate load.

Under the action of normal use load, reinforced concrete structure is generally working with cracks, and the crack range that is generally visible to the naked eye is, and the crack width is less than the harmless crack, and the influence on waterproofing, anti-corrosion and load-bearing can be negligible.

Extended information: Cracks in reinforced concrete beams are described as follows:

The current code in China controls the maximum crack width of concrete structural components under general normal use conditions. Therefore, from an economic and scientific point of view, a certain degree of fissures is acceptable.

What is the range of crack width of reinforced concrete beams?

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Hello dear, the crack width of the reinforced concrete beam is at the maximum crack width limit or normal. The presence of cracks is a common phenomenon in concrete structures. A large number of scientific research and practice have proved that cracks in concrete structures are inevitable, and the load is often 15% to 25% of the ultimate load.

Under the action of normal use load, the reinforced concrete structure is generally made by the early letter bureau with cracks, and the crack range visible to the naked eye is generally less than the harmless crack, and the impact on waterproofing, anti-corrosion and load-bearing is negligible. Extended information: Cracks in reinforced concrete beams are described as follows:

The current code in China controls the maximum crack width of concrete plain soil structural components under normal use conditions. Therefore, from an economic and scientific point of view, a certain degree of cracks is acceptable.

Is it normal for my house to have 1 mm in the beam row seam.

Cross beams, there are no standing beams underneath.

There is a millimeter of seam around the cross beam.

There are rows of seams at a distance of 50 cm around the cross beam.

It's been four years, and this year there is a row of seams.

Do you need reinforcement.

Kisses that are needed.

The crack width of the reinforced concrete beam is at the maximum crack width limit or is normal.

The presence of cracks is a common phenomenon in concrete structures. A large number of scientific research and practice have proved that cracks in concrete structures are inevitable, and the load is often 15% to 25% of the ultimate load.

Under the action of normal use load, reinforced concrete structure is generally working with cracks, and the crack range that is generally visible to the naked eye is, and the crack width is less than the harmless crack, and the influence on waterproofing, anti-corrosion and load-bearing can be negligible.

The beam cracks are not normal and can only be treated with reinforcement methods.

It should be within 1 to 3 millimeters.

The cracks of reinforced concrete structural components can be divided into three types according to their characterization: small cracks on the surface, that is, the crack width is very small, and the length is short and shallow; Medium cracks, the width of which is on the left and right, and the length is limited to the tension zone, and the cracks have penetrated into the structure to a certain depth; A penetrating crack in which the width of the crack exceeds and the length extends to the compression zone, and the crack has penetrated the entire section or part of the section.

Structural cracks not only characterize the stress of the structure, but also affect the durability of the structure. The wider the crack width, the easier it is for the rebar to corrode, which means that the grip between the rebar and the concrete has been completely broken, and the service life is nearing the end of its life.

In general indoor structure, the risk of transverse cracks causing steel corrosion is small, and the cracks do not affect the aesthetic requirements, while in a humid environment, cracks will cause steel corrosion, and the crack width should be less than, but the longitudinal cracks are easy to cause steel corrosion, and lead to the peeling off of the protective layer, which affects the durability of the structure and should be treated. When the crack length is long and the depth is deep, it seriously affects the integrity of the component, which is often a sign of failure.

For example, if there is a crack at the bottom of the beam of the positive section of the flexural member, the crack length develops to the compression zone and reaches or exceeds the neutralization axis, which is more dangerous. The depth of the crack is also one of the characteristics, usually the surface cracks are mostly non-structural cracks, and the penetrating cracks are mostly structural cracks, which are easy to make the steel bar corroded, and the danger is greater, the cause should be identified, and the necessary reinforcement measures should be taken according to the danger.

According to their propagation properties, cracks in reinforced concrete structural components are usually divided into three types: stable cracks, that is, the width and length of cracks remain constant; Active cracks, the width and length of which vary with the load state and the surrounding temperature and humidity; Cracks develop, and the width and length of the cracks grow over time.

Under the action of various loads, the reinforced concrete structure is generally allowed to work under the cracks in the tension area, that is to say, the cracks are inevitable, as long as the cracks are stable, its width is not large, it meets the requirements of the code, and there is not much danger, and it is a safety member.

However, the crack continues to expand with time, indicating that the stress of the reinforcement may be close to or reach the flow limit, which has a serious impact on the bearing capacity, and the danger is greater, so measures should be taken in time. The structure of the crack is stable, whether the crack will expand again, and it depends on whether the environment is stable, the environment changes, the old crack may still expand, and new cracks will also appear, which should be analyzed in combination with specific conditions.

Hello dear. It is wrong for a reinforced concrete member whose maximum crack width is equal to the average strain of the reinforcement between the cracks multiplied by the maximum crack spacing. Dear, <>

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