Excess amount of column reinforcement

[illaga]

I am a 4th year civil engineering student. I am working on İdecad. I have a few questions on the project I'm working on. 1- While I thought that the amount of reinforcement would decrease as one went from the basement to the attic, I saw that it increased. In some columns, I was able to solve this by equalizing the amount of reinforcement in the basement, floor, normal and attic columns. But in some columns I could not solve it. Can you help me? 2-Can we trust the equipment assigned by the program after performing the analysis after the data entries in the İdecad program. So sometimes it throws exaggerated equipment. Do we need to be involved as a staticsist? 3- While I enter the building system, I solve the ladder together with the building. i.e. i don't solve it separately from data window Some friends suggested that there is an easier way, and that I should solve the ladder last, apart from the system. I don't know how this is done and how it affects the system. I'm also asking for help with this. Thanks...

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[Levent Özpak]

1- While I thought that the amount of reinforcement would decrease as one went from the basement to the attic, I saw that it increased on the contrary. I was able to solve this problem in some columns by equalizing the amount of reinforcement in the basement, ground, normal and attic columns. However, I could not solve it for some columns. Would you be ok?

The reinforcement of columns that give AS(-) warning does not statically meet the required pursantan.It would be appropriate to arrange the column reinforcements by taking the largest reinforcement as reference. Then we can trust the props that the program assigns. So sometimes exaggerated reinforcement is thrown. Do we need to be involved as statics?[/quote] If there is no problem in data entry, you can rely on analysis and reinforced concrete results. The fact that the reinforcements in the elements in the structural system are more than the minimum values indicates that the related element or elements are forced. Apart from this, the project engineer should always examine and evaluate the analysis results in order to reach the optimum solution and ensure project compliance. (In your project, the columns on the 1st and 9th axis of the attic have been removed. Your S2 and S12 columns in the attic are so hard from it. When you copy and analyze the 2nd floor to the roof, you will see that the column reinforcements are reduced)

3-I building system I solve the ladder together with the structure when I enter. That is, I do not solve it separately from the data window. Some friends suggested that there is an easier way to solve the ladder separately from the system. I do not know how this is done and how it affects the system. I also request help in this regard.[/ quote] In order to solve the staircase separately from the system, it is sufficient to arrange the stair support conditions according to the solution conditions independent of the structure. There is no need to define the staircase in a separate project. In this case, it is appropriate to give the stair loads as an additional load to the relevant elements. In order to solve the staircase together with the structure, the stair supports together with the structure Editing the solution conditions and Analysis Settings/General Settings It is appropriate to perform analysis by selecting the Semi-rigid diaphragm option from the Drives Tab. (By the way, ladder is not defined in the project you added) Good work

 

[illaga]

Thank you Levent for your interest and solutions..I will ask one more thing..Is it healthy to enter 5.5 for columns and beams for this project? I think it would be ideal if 2.5-3 cm was chosen. What conditions do the cover thicknesses depend on? Does rust cause an increase/decrease in the amount of reinforcement? Best regards

 

[illaga]

can you reply to my message

 

[Levent Özpak]

Thank you for your interest and solutions, my teacher levent..I will ask one more thing..Is it healthy to enter 5.5 in the columns and beams for this project? I think, what conditions are the cover thicknesses dependent on? Does the cover space cause an increase/decrease in the amount of reinforcement? Best regards

Net concrete cover and concrete cover concepts are available in TS 500 February 2000. The value entered in the parameters is the concrete cover value. The net concrete cover program automatically Net concrete cover value is also printed in reports and drawings. If you mean net concrete cover by cover, when a value such as 4.5 cm concrete cover is entered in the parameters, it can be seen that the net concrete cover value is calculated as 3 cm in the report and drawings. The concrete cover value affects the amount of reinforcement. ] Concrete cover:[/b] It is the distance from the center of gravity of the longitudinal reinforcement to the outermost concrete fiber Net Concrete cover: Between the outer surface of the outermost reinforcement and the outermost concrete fiber i is the distance.