Thanks Sir....
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RE: Against a same Load why Beam Reactions are varied?
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Against a same Load why Beam Reactions are varied?
Hi,
I create two simple frame of same RC beam properties with same load, provided dist. member load -1 kip/ft on beams only.
The 1ST RC frame consists of Shear-wall, Column and Beam when 2ND RC frame consists of Column and Beam. I have a question about Beam-reactions of 1ST frame, when I used surface (shear-wall) at one side of frame the end moments (-ve Moment) of beam are not equal in values.
But, when I used member (column) in both side of frame (beam) in 2ND frame, the reactions are same in values. I can't understand it, how is it possible without lateral force a beam end reactions are different.
Further question, in this case of analysis results, which moment I would be considered?
NB: For more clarity of my question, I attached my analysis observation here. Please give a more explanation which I was missed in my questions.
Thanks,
Joty
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RE: ISM Repository Creation Crash
Hi,
Could you try doing these steps outlined in troubleshooting opening a RAM model and the try creating a repository again? I have seen following these steps resolve some problems when trying to create a new repository. If that does not work could you please send your RAM model for review?
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RE: ISM Repository Creation Crash
Thanks Steve,
Not working - file uploaded as "test RSS to Revit.zip"
Not working - file uploaded as "test RSS to Revit.zip"
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RE: PROBABLE CAUSE NEGATIVE DIAGONAL =>LDLT MTX Error in truss model
The warnings are due to the fact that the design is being carried out as per the IS802 design code where members are designed for axial forces only assuming these are axial only members or TRUSS members. The fact that you using partial moment releases would mean that some amount of moments would develop in these members which the software is not designing for and it is trying to communicate that information to you through these warnings.
The way to get rid of the warnings is to specify the frame as a TRUSS type frame. However with the type of structure and loading you have applied on it, I don’t think you can do that. For example consider node 59. If the members connecting to the node 37 113 124 and 125 are all TRUSS members, there is no stiffness at that joint to carry a load that is in the X direction. If you look at your load case 3, there is a joint load acting in X direction which cannot be taken up by any member, as none of these members will have any ability to carry any shear if these are declared as TRUSSes. So you may need to have another member in X direction at that joint or you should only specify the braces 124 and 125 as TRUSS members but not members 37 and 113 in which case you would get these warnings for those 2 members.
Also I would definitely recommend that before you get into the design phase, you check the nodal displacements and ensure that these are within acceptable limits.
The way to get rid of the warnings is to specify the frame as a TRUSS type frame. However with the type of structure and loading you have applied on it, I don’t think you can do that. For example consider node 59. If the members connecting to the node 37 113 124 and 125 are all TRUSS members, there is no stiffness at that joint to carry a load that is in the X direction. If you look at your load case 3, there is a joint load acting in X direction which cannot be taken up by any member, as none of these members will have any ability to carry any shear if these are declared as TRUSSes. So you may need to have another member in X direction at that joint or you should only specify the braces 124 and 125 as TRUSS members but not members 37 and 113 in which case you would get these warnings for those 2 members.
Also I would definitely recommend that before you get into the design phase, you check the nodal displacements and ensure that these are within acceptable limits.
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RE: ISM Repository Creation Crash
Tim, I got your model and I am getting a little different error but it is still crashing for me. I will try a few things and see if I can get it to work. Otherwise I will need to get on of the developers to look at it.
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RE: ISM Repository Creation Crash
Thanks.
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ISM Repository Creation Crash
ISM has been nothing but a pain - I wish we still had the old direct link available. Trying to create a repository from a RAM Model. Just installed the updated versions of RAM, Synchronizer and the Revit plugin this morning.
I get this message on attempting to create an ISM repository:
and then it crashes and gives me the option for a backup or most recent database. If I choose backup, then try and view what's in it I get this message:
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RE: Dynamic Load
Start with these STAAD.pro Dynamic Analysis FAQ.
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Dynamic Load
Dear Sir / Mam,
In this Year (2017) i am using Staad Pro. i am facing a problem who i can design steel frame with Dynamic load. I have rpm and Mpa (loading details). please provide your reply..
Regards
Yashvir
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RE: ISM Repository Creation Crash
Steve tried redefining the model story data and then it worked. That narrows things down to a problem with braces (which are purged in this process) or something with the member unique IDs which are regenerated with new stories.
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RE: Bearing Stress
Not sure which software you are referring to but if the question is related to STAAD.Pro, you can right click the mouse and choose Labels and plot the contour plot for the Bae Pressure as shown next
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RE: Bearing Stress
This is for RAM CONCEPT
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Bearing Stress
It would be very help full to add the contour values tool to the "Soil Bearing Design"
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我使用旋转复制命令，梁的局部坐标系不跟着一块进行旋转，导致旋转复制后的梁截面放置完全乱了，是我设置有问题吗？
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RE: Continuous Beam Along at the Top of Column Connection
Thank you seth for your immediate reply. Sorry I do not have exact sample for Column Cap connection reference manuals, i just design currently by calculating force will act at the end of the hollow section then design the weld or bolt as per Eurocode.
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Continuous Beam Along at the Top of Column Connection
Hi,
I know this type of connection is just easy to calculate, but still I wanted to ask if this type of connection is available to the ram connection in Eurocode.
Thanks
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RE: staad pro
yes ok but what does this mean, is it important in a structural assessment ?
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staad pro
what does these messages means :
**WARNING** AVERAGE FLANGE THICKNESS IS TAKEN FOR DESIGN
**WARNING** TAPERED BEAM DESIGN OUTPUT RESTRICTED TO TRACK 0
thank you
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RE: Member Specification
You can go through section 5.20.9 and 5.20.10 of the Technical reference manual for more details about these. (In the STAAD window, click on Help > Contents to open this).
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