topic Re: RC WALL DESIGN TO EC2 - Analytical method extreamly large required reinf in Robot Structural Analysis Forum

RC WALL DESIGN TO EC2 - Analytical method extreamly large required reinf

Anonymous — Thu, 23 Nov 2017 15:10:26 GMT

I am trying to design the required reinforcement for core walls, based on the recommended methods on various webinars.

However I am getting extremely large required reinforcement values at few locations, see attached.

What is causing these large spikes in the values and has anyone found a solution to the problem?

I have also tried using the direct provided reinforcement module however the required reinforcement is different to the analytical method, see attached.

Any reason why they would be different?

Re: RC WALL DESIGN TO EC2 - Analytical method extreamly large required reinf

mustafahesenow — Thu, 21 Dec 2017 07:14:38 GMT

Hi @Anonymous

Have include in the calculation parameters reinforcement correction of cracking and deflection ?

Could you please send the model .

Re: RC WALL DESIGN TO EC2 - Analytical method extreamly large required reinf

Artur.Kosakowski — Thu, 21 Dec 2017 09:53:33 GMT

Hi @Anonymous

If these huge values are in the corner nodes of the walls you may consider looking at the values in the centers of the corners' surface elements instead.

Mind to switch of global averaging of forces while calculating reinforcement.

If one or more of these posts answered your question, please click Accept as Solution on the posts that helped you so others in the community can find them easily.

Re: RC WALL DESIGN TO EC2 - Analytical method extreamly large required reinf

Anonymous — Thu, 21 Dec 2017 10:23:11 GMT

Please find link for the Robot file for the RC wall design: https://we.tl/VpUaCbVYSd

Regards,

Parag

Re: RC WALL DESIGN TO EC2 - Analytical method extreamly large required reinf

Artur.Kosakowski — Wed, 27 Dec 2017 07:02:34 GMT

Hi @Anonymous

First of all you included out of the plane bending in the calculation of reinforcement so you have to include it when you think about the required area of reinforcement. Then if you display the actual sizes of beams and columns you may consider disregarding the results of panel reinforcement in the areas they overlap or add rigid links corresponding to the sizes of columns.

If one or more of these posts answered your question, please click Accept as Solution on the posts that helped you so others in the community can find them easily.

Re: RC WALL DESIGN TO EC2 - Analytical method extreamly large required reinf

Anonymous — Thu, 04 Jan 2018 11:32:11 GMT

Artur,

I used the rigid link option however this does not solve the problem, you can download the robot file from link https://we.tl/ycv2uDFN4o

I tried three different alteration, by adding rigid links where the required reinforcement was extremely high.

However the extreme vales just move to different location. I just feel that there is something fundamentally wrong with the design modules when it comes to RC walls.

I am going to use Etabs to verify the design and ensure that results from Robot are valid.

Re: RC WALL DESIGN TO EC2 - Analytical method extreamly large required reinf

me1205377 — Tue, 09 Jan 2018 16:18:55 GMT

it would be really great if you can share with us your findings after the comparison

regards

Re: RC WALL DESIGN TO EC2 - Analytical method extreamly large required reinf

Anonymous — Mon, 15 Jan 2018 15:06:26 GMT

Mustafa,

You can not carryout direct comparison, Etabs & Robot work differently.

I am just carrying out high level review of the reinforcement.

Regards,

Parag