topic Re: Robot Analysis Warnings (cladding load distribution) (Instability 1,2 and 3) in Robot Structural Analysis Forum

Robot Analysis Warnings (cladding load distribution) (Instability 1,2 and 3)

emad.abdalghaffar — Mon, 10 Feb 2020 04:36:34 GMT

Some descriptions about the attached model, from which may someone get what caused such warnings:

> Regarding the "the load has not distributed correctly, there are no objects or elements carrying the load overlap"

- The cladding defined as "one way-x" to distribute the load as desired. (with edge bars)
- I did define the cladding at first, then assigned to it some area load, then wind simulation was been performed.
Also, is it mandatory to define cladding before performing wind simulation, or could I did that without any claddings ?

> Regarding the "Instability 1,2 and 3" warnings:
- In the modelling, I did define some bars as "truss", and all the rest as "beam" with Ry Rz releases.
- All supports are pinned.

Also, is it a problem if one joint has more than one member with the same releases at its end which at this joint?

Thanks in advance,
Emad

Re: Robot Analysis Warnings (cladding load distribution) (Instability 1,2 and 3)

emad.abdalghaffar — Mon, 10 Feb 2020 23:24:25 GMT

@Artur.Kosakowski Can you help please? If I can ignore the instability warnings in this case or not.

Re: Robot Analysis Warnings (cladding load distribution) (Instability 1,2 and 3)

paul.bassLH — Wed, 26 Feb 2020 13:39:46 GMT

Hi,

-You have to much truss beams and releases.

A truss beam is equivalent to a pinned-pinned beam with Rx, Ry and Rz free. HEB600 and HEB240 are not truss anymore.

-Columns are pinned-pinned with a pinned support : I replace pinned support with fixed support

-I remove all loads applied to nothing and all loads applied to outlines of panels and i don't have the message error about panels and loads.

No more error message

This is not the solution but maybe a way to find it.

Regards