There is a circle of transverse cracks in the concrete pillars and beams of the house

As follows:

1. Transverse cracks occur in reinforced concrete columns under compression, which may be due to insufficient mutual anchorage of column or beam longitudinal reinforcement.

2. Reinforced concrete refers to the components formed by filling concrete in steel pipes. Columns made of reinforced concrete material. It is the most basic load-bearing component in various engineering structures such as houses, bridges, and hydraulics, and is often used as the pillar of the floor, the pier, the foundation column, the tower and the truss of the pressure rod.

3. Cracks refer to the cracks produced by the material under the action of stress or environment (or both).

How it works. The reason why reinforced concrete can work together is determined by its own material properties. First of all, steel and concrete have approximately the same linear expansion coefficient, and will not be overstressed due to different environments. Secondly, there is a good adhesion between the steel bar and the concrete, and sometimes the surface of the steel bar is also processed into spaced ribs (called deformed steel bars) to improve the mechanical occlusion between the concrete and the steel bar.

When this is still not enough to transmit the tensile force between the rebar and the concrete, the ends of the rebar are usually bent up 90 degrees. In addition, the alkaline environment provided by calcium hydroxide in concrete forms a passivation protective film on the surface of the steel bar, making the steel bar less susceptible to corrosion than in neutral and acidic environments.

I've also encountered this problem, the crack appears at the lower mouth of the beam, and on the outside of the column, into the half of the column. The reasons may be:

1. The reinforcement treatment of the column and beam node does not meet the requirements, especially the column stirrups are not encrypted, resulting in insufficient local shear resistance.

2. The longitudinal reinforcement of the column or beam is not enough to anchor each other.

3. In the construction project, after the concrete is poured and the strength does not increase, the beam and plate support sinks, resulting in a large amount of local deformation, which exceeds the deformation control during the design.

The frame column is not fully compressed, and if it is eccentric, it is locally tensioned.

Hello dear! I am glad to answer for you: what is the reason for the vertical crack in the middle of the frame beamAnswer: Hello dear <>

Sleepy Waiter 1Beam reinforcement is insufficient, resulting in the cracking caused by the load of the upper part of the journey, such reinforcement is unreasonable, there are pits are longitudinal reinforcement or may be negative moment reinforcement or stirrups, such is a fatal congenital insufficiency, generally to take reinforcement or restriction measures 2If the maintenance time is insufficient or there is no maintenance at all, the general crack will not be too large, and it is generally a crack or a non-through joint joint of irregular hair size, and generally does not need to be treated 3

The span is large, the dust holding time is too early, and the beam deformation caused by the support sinking in the process of pouring concrete may later develop into cracks4Complex stress conditions such as compression, tension and torsion of the upper component caused by the uneven settlement of the ground pole, and cracks occur when the beam's own stiffness cannot resist.

Hello, glad to answer for you. What is the reason for the transverse cracks in the reinforced concrete column under compressionRelated information: 1. What is the reason for the improper water-cement mix ratio of the concrete column due to the cracks:

Concrete has a fixed ratio, whether it is a small amount of cement, or a large amount of water, or there are more impurities in the mixing process, there is a risk of cracking after curing. Cement material abnormality: the cement used in concrete is very important, is the key to its strength, if the curing time is not enough, it will not reach the corresponding strength, and there will naturally be cracks.

If the cement is stored for too long, it will also lead to a decrease in strength and cracking. Improper pouring: When the concrete is not vibrated in place during the pouring process, or when there is slurry leakage, it is easy to crack.

Inadequate maintenance: Concrete columns need to be properly cured after pouring, or if the temperature and humidity conditions are not suitable, it will affect the strength and lead to crack problems. Once there are cracks in the concrete columns, you need to find a professional to deal with them in time, otherwise it will bring danger to the whole building, you can use building structural adhesive to repair the cracks, or use carbon fiber reinforcement treatment.

If the project has not been delivered, it can be reconstructed to avoid danger in the later stage. Extended information: Second, concrete pouring should pay attention to what concrete pouring before and after can not be sloppy, before pouring need to install the formwork, and fully watering and moistening, at the same time to remove the debris above, if there is stagnant water, but also to deal with it, to ensure that the field can be closed after being in place.

In the pouring process, it is necessary to construct in sections and layers, generally the pouring height of each layer should be controlled, and the vibrator should be used to fully vibrate after each layer is poured to ensure that there will be no bubbles, leakage and so on.

What is going on with cracks in commercial concrete beams, of course, the cracks of concrete beams are not in a normal posture, the general load-bearing beam is very strong, and the model of steel and concrete is very particular, after the general concrete is poured, the compaction is carried out and the solidification of the concrete is waited, and finally the series of processes of demoulding are very rigorous, and the weather factors will be taken into account. Therefore, the concrete itself has a certain elasticity, and this kind of crack will generally not occur. If there are slight small cracks, but the intermittent kind may not have much impact on the load-bearing, because due to the weather, due to humidity, due to the material of the concrete, etc., there will be a little such cracks, as the construction unit will also deal with these cracks, when the hall will also have inspectors to test.