basement and ground floor columns

[merveduygu]

The number of column reinforcements on the basement floor and the ground floor do not match. While there are 10 12s in a column on the ground floor, it shows 22 12s in the same column on the ground floor. How can I fix the difference if it is due to the curtains on the basement floor? I will be grateful if you could help me.

 

[Levent Özpak]

Due to the column design effects, the reinforcement on the upper floor may be more than the one on the lower floor. In the Column Reinforced Concrete dialog, the column reinforcement on the lower floor can be arranged to be the same as the upper floor.

 

[merveduygu]

thank you levent ozpak

 

[bedros]

the number of column reinforcements in the basement and the ground floor do not match. There are 10 12 pieces of iron in a column on the ground floor, while there are 22 12 pieces in the same column on the ground floor. Can it be the curtains in the basement floor and dissolve them together according to that If it is due to the reinforcement, how can I fix the difference. I would appreciate it if you could help.

I need to specify before I write the answer to your question. You can't use 12-gauge reinforcement in columns. Now to answer your question. Vertical reinforcements are used for bending and normal force effects in columns. However, equal size , two identical columns of equal height, equal concrete strength, and equal reinforcement do not have the same moment capacity. Because the moment capacity of the column is determined by the normal force size.How much is the normal force up to a certain value? The higher the moment, the higher the moment capacity of the column. For this reason, our project engineer friends have probably encountered one of the following two situations: 1. CASE: The situation where there is more reinforcement in the same column on the upper floor. If this situation is examined, it is seen that the normal force decreases in the upper floors. Since the normal force of the column in the lower floor is high, the moment capacity is high. When you put the same reinforcement on the column on the upper floor, the moment capacity may not be as much as the column on the lower floor, since the normal force is low. This is why a few additional vertical reinforcements are placed on the upper floor column to bring the moment capacity to the required level. Thus, the torque capacity is increased. Although the columns are the same, the number of reinforcements in the upper floor column increases. STATUS 2: When the same type of columns is in the middle column (near the middle of the building), that is, the reinforcement is sufficient when the normal force is high, you can see that more reinforcement is thrown when the same type of column is at the corner (building corner). You may have even heard the following expression from some of your engineer friends: "There is more load on the middle column, there are 10 16's, very little force is coming to the side column, there are 12 16' reinforcements.". This is perfectly normal. There are no errors in the software. Because the middle column receives more normal force, the moment capacity is higher, while the side column receives a lower normal force, so the moment capacity is low. The moment capacity is increased by adding additional reinforcement to the side column with low moment capacity. Quoted from Ahmet Çelikkollu's comment.

 

[siromar]

What is written is correct but may cause misunderstanding. Column capacity diagram should be examined, the part in which the moment carrying capacity is directly proportional with the increase of the column axial load is the part in the tensile region of the column. As the axial load increases and the pressure zone increases, the moment capacity will decrease, and risks such as the risk of brittle fracture of the column and the creep effect will arise. The joke here is to examine the column capacity diagram (in all combinations) and interpret it by the engineer.

 

[umut gudukoglu]

I had the same problem. In a 32-column structure, 17 columns were designed with less reinforcement in the basement than in the upper floors, I increased the number of reinforcements in the basement from the reinforced concrete tab, but when I re-analyze, I get the warning that there is a lack of reinforcement in the basement. There was no problem when the doat was less, but when I increased it, I got a missing warning How can I solve it?

 

[Levent Özpak]

I had the same problem, in a 32-column structure, 17 columns were designed with less reinforcement in the basement than in the upper floors, I increased the number of reinforcements in the basement from the reinforced concrete tab, but when I re-analyzed, the reinforcement was missing in the basement. I get a warning. There was no problem when the amount was less, but when I increased it, I got a missing warning How can I solve it?

AS(-) warning may be caused by insufficient stirrup reinforcement. Decrease the spacing of the stirrup and increase its diameter. If the problem is not resolved, add your project, let's examine it. Good work

 

[epoxi]

Due to the design effects of the column, the reinforcement on the upper floor may exceed the one on the lower floor. In the Column Reinforced Concrete dialog, the column reinforcement on the lower floor can be arranged to be the same as the upper floor.

I could not find this arrangement button, but it helps I'm just using the demo, I wonder if it could be because of that (column reinforced concrete dialog, rearrange the upper and lower floors?...)

 

[Levent Özpak]

Due to the column design effects, the reinforcement on the upper floor may exceed that on the lower floor. In the Column Reinforced Concrete dialog, the column reinforcement at the bottom floor can be arranged to be the same as the top floor.

I couldn't find this arrangement button, can you help me, I'm just using a demo, can it be because (arrange the column reinforced concrete dialog bottom and top floor?...)[ /quote] In the column reinforced concrete dialog, double-click the row you want to change. You can change the diameter and number of rebars in the rebar dialog that opens.

 

[epoxi]

I understood from your statements that we can change it in a different way, otherwise I knew this menu, but thank you for your interest.