The practical use of the concrete design menu
Within the concrete menu, you have several options. To know them well, use these tips to achieve your goal quickly.
To design 1D members (Beams, ribs, and columns):
STEP 1: Check the internal forces:
It is quite important to understand your internal forces and see if everything is logical and aligned with your expectations. If not, then you have to fix that before spending any time on the reinforcement calculation.
STEP 2: Check if your template reinforcement difinition is ok via As,add,req
To be sure that your template reinforcement (As basic + As add) is ok or not, go to the “As, add, req”.
In fact, this value is designed to show you if your providing reinforcement (As basic + As add) bigger or equal to As,req.
So, based on that, you may see some required additional reinforcement somewhere along the beam. Or, you may see no results. If no results, then, in fact, this is what we are looking for.
What should I do if I see the value of As, add, req > zero? Well, in this case, you need to change your template reinforcement (increase) to cover this missing reinforcement.
STEP 3: Calculate As
After checking the value of As,add,req = zero, you can go to the next step and calculate your provided reinforcement.
As prov. = As,basic + As,add (those two values coming from the template reinforcement inside the design default).
STEP 4: How to check if As,prov is ready for the final conversion?
In the design menu, you can have several options to make sure that the designed reinforcement is ready to go for the final conversion.
Some of these options are:
UC (As,req) = As,req / As, Prov.
This value is to compare the required reinforcement and the provided reinforcement. This value should be always less or equal to one. If this value is bigger than 1, then this means that you have skipped step 2 in this procedure because you can see that the value of As,add,req > 0.
UC (As,max) = As,prov. / As,max
This value is to compare the provided reinforcement and the max allowable reinforcement from the code requirement. This value should be less than one in most of the cases.
STEP 5: Checking the shear reinforcement:
You can repeat the same steps to be sure that your shear reinforcement is ok or not.
STEP 6: Convert the final reinforcement to real bars:
After doing all the steps before, your reinforcement is now ready to be converted to real bars.
There are several advantages to the converted reinforcement. Here are some of that:
1. Understand the results: after the conversion, you can see your reinforcement as 3D bars. This will help you understand your results and make sure if everything is aligned with your expectations.
2. Get the benefits of the supported ULS+SLS checks: without converting, you can not use the checks unless you decided to model the bars manually which could take a lot of time from you. So, do the conversion and start using the checks to make sure your reinforcement will fulfill the ULS+SLS requirements.