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[ashoknadagoud]

Dear Sefians,


In RC Framed structure, for e.g., beam B is resting on midspan of  beam A and there is a node on the intersection. Since the presence of the node, the beam A is divided in to two. 
Please clarify, whether Staad considers beam A as one single beam or two beams? How to make beam A as single beam?


Thanks and Regards,

Posted via Email

[Surendra S]

its two beam... however the BMD and SFD will be as single beam only... pls check. there is no need to make it one beam.. reading to be checked twice for both beamsrgd
SS



On Thu, Jul 4, 2013 at 10:31 AM, ashoknadagoud <forum@sefindia.org (forum@sefindia.org)> wrote:

[sraipure]

staad considers it as a two beams, but the behavior of the these two beams will be similar to that of a single beam. i.e. if you see the deflections, bending moment & SF values in both the cases these values will be same. In staad, point load can not be applied without inserting a node. Even if it is a single beam with point load, it will split in to two, but the results will not differ. regards..





On Thu, Jul 4, 2013 at 10:31 AM, ashoknadagoud <forum@sefindia.org (forum@sefindia.org)> wrote:

[Manoharbs_eq]

Dear Ashok,

How does it matter, Even if the beam is divided the forces are same.If you are designing in Staad, for ease can assign as profile beam,or else provide the length in the design command selecting the beams.

However the analysis and forces does not differ, However in Etabs even if the beam is connected to beam we can have single line without breaking.



Rgds
Manohar

[ykarande1]

Dear Ashok,

STAAD will consider beam as two different beam elements.


As far as geometry is concerned,one can use the "merge beams"command to make beam A a single beam,but it would be better to check and compare the results in the above two cases.


Also Staad may consider the stiffness of the nodes which would make a difference.




Thanks & Regards,
Yogesh 



On Thu, Jul 4, 2013 at 10:31 AM, ashoknadagoud <forum@sefindia.org (forum@sefindia.org)> wrote:

[dssisodiya]

in RISA  there is facility to define a beam with multiple nodes between supports
as a single element.
In Struds also a beam with intermediate nodes, beam is designed as single element
with point load from secondary beams.
D.S.Sisodiya
Raipur



On Thu, Jul 4, 2013 at 10:31 AM, ashoknadagoud <forum@sefindia.org (forum@sefindia.org)> wrote:

[syed_A]

Hello
The Other way is like this.....
1> Note down the shear force of secondary beam with factor 1
2> Start new file staad plane
3> Model the main beam say 5 meters and assign all the loads, such as    selfweight,wall load and slab load etc
   (if it is Trap load then split in two triangles and rectangle, for triangular load two triangles can be    assigned)
4> point load of sec beam is at say mid point, assign this also
5> assign the supports
6> Remaining as usual with factor 1.5
  
   Hope it is the other option I feel, lets see what others have to say

Done

[Kunal Tank]

The moment we introduce a node in a Beam it divides the beam in to two segments. Now the interesting thing is we can use Interactive RC Designer (the tool available in Staad.Pro & dedicated to RC design) to convert them into single 'Physical Member' & design as a single beam.

Not only this in RC designer we can actually define the single physical member formed by number of beams who are the part of a continuous beam.


For more detail you may contact to the local resource from Bentley who can help you on this.


Thanks & Regards,
Kunal


Sr. Application Engineer
Bentley Systems - KL



On 4 July 2013 13:01, ashoknadagoud <forum@sefindia.org (forum@sefindia.org)> wrote:

[Bharathhassan]

Hi

Release Beam B at the ends.




On Thu, Jul 4, 2013 at 10:31 AM, ashoknadagoud <forum@sefindia.org (forum@sefindia.org)> wrote:

[prof.arc]

A physical BEAM represented by a one dimensional beam element [having either 3 or 6 degree of freedom per node] must have

ATLEAST 2 nodes, one node each at its two nodes.

Any number of intermediate nodes can be used - (a) to correspond to location of cross beams resting on it

(b) to idealize, say, beam of varying depths as combination of several smaller beam of constant depth


I realize that fundamentals of FEM are not taught properly and hence such questions


ARC







On Thu, Jul 4, 2013 at 1:01 AM, ashoknadagoud <forum@sefindia.org (forum@sefindia.org)> wrote: