topic Re: Composite beam extension - wrong design of beam size in Robot Structural Analysis Forum

Composite beam extension - wrong design of beam size

khimpitou — Tue, 03 Oct 2017 08:34:20 GMT

Dear all,

I would like to design composited beam extension by my drafting layout but RSA has chosen beam section does not match i supposed ( Girder beam section smaller than Beam), why ?

Regards,

Pitou

@khimpitou Artur Kosakowski edited the topic for better findability

Re: Composite beam extension - wrong design of beam size

Artur.Kosakowski — Tue, 03 Oct 2017 08:34:41 GMT

Hi @khimpitou

Assuming the load is transferred from the slab to 'beams' and then as point loads from 'beams' to girders then you may consider setting they one way load distribution rather than the two way ones.

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

Re: Composite beam extension - wrong design of beam size

khimpitou — Tue, 03 Oct 2017 08:35:11 GMT

Thank for replying Aurtur !!

I has changed panel calculation model to one-way but nothing changed !

Re: Composite beam extension - wrong design of beam size

Artur.Kosakowski — Tue, 03 Oct 2017 08:35:31 GMT

Hi @khimpitou

Which module of RSA did you use to design the beams?

Re: Composite beam extension - wrong design of beam size

khimpitou — Tue, 03 Oct 2017 08:35:48 GMT

I used composited beam extension for RSA 2017

Re: Composite beam extension - wrong design of beam size

mustafahesenow — Tue, 03 Oct 2017 08:36:08 GMT

Hi @khimpitou

Could you please mentioned to the beam number which you are thinking should be less and what the section should be base on your hand calculation.

Re: Composite beam extension - wrong design of beam size

khimpitou — Tue, 03 Oct 2017 08:37:22 GMT

Please check my attached picture and rsa file !

Re: Composite beam extension - wrong design of beam size

khimpitou — Tue, 03 Oct 2017 08:37:44 GMT

Where are you, Jesus ?

Re: Composite beam extension - wrong design of beam size

mustafahesenow — Tue, 03 Oct 2017 08:38:06 GMT

Hi @khimpitou

First of all the main beams should be 1 segment column to column not segmented at each intersection point with secondary beams.

Specify clear Construction Dead load (weight of steel member and concrete slab with metal deck and reinforcement ) Name it as construction Dead load.

Specify clear construction live load

make calculation and run the extension it will work 100%

Re: Composite beam extension - wrong design of beam size

khimpitou — Tue, 03 Oct 2017 08:38:28 GMT

I could not find any thing contrast your direction ! Have you check my rsa file ?

Re: Composite beam extension - wrong design of beam size

mustafahesenow — Tue, 03 Oct 2017 08:38:52 GMT

Hi @khimpitou

Yes I had checked it and these comments is from your model

you got small sections for main beams because you draw it segments between secondary the loads not specified well please update your model and see

For sure it will work I tried it already and its working .

Re: Composite beam extension - wrong design of beam size

khimpitou — Tue, 03 Oct 2017 08:39:13 GMT

Embarrassing!

Re: Composite beam extension - wrong design of beam size

khimpitou — Fri, 06 Oct 2017 04:16:25 GMT

Good afternoon

One more question, Should I intersect the beam (highlighted in attached picture)with middle secondary beam or not?

Regards,

Pitou

Re: Composite beam extension - wrong design of beam size

mustafahesenow — Fri, 06 Oct 2017 17:13:59 GMT

Hi @khimpitou

No you should keep it one segment as it is .