STAAD generated wind loads
Is STAAD equipped to automatically generate torsion from wind, per ASCE 7-10 for buildings?
RE: Difference between wall with openings and individual walls
The difference is in the total applied load
force
wind Y
model 1
127 k
model 2
343 k
As reported in the Loads and Applied force report (and also in the analysis log total reactions).
The reason for the difference is…
How to assign Wind Load to Glassing 2D Frame Structure
I have designed the 2d model with External Elevation and i used tublar steel section (in site im using MS Tube to hold the glass ) for Mullions and Transoms instead of columns and Beams.Then i give self wt as 1,Dead load(Glass Load) =Height of glass*…
RE: NO RIGID DIAPHRAGM WARNING
This note regarding floor diaphragm is a generic one and the purpose is to make the user aware that if there is a floor diaphragm definition, that should precede any wind load definition. In your case there is no floor diaphragm and so this warning is…
RE: Wind Load and Lateral Earth Pressure on Building with Basement
If you set the Ram Frame - Criteria - Ground level up one story from the base it will reduce the wind exposure. For more in this see: communities.bentley.com/.../18422.ram-frame-criteria-ground-level
RAM Wind Loads
Working on a 55' wide X 80' long X 33' tall building with perimeter curtain walls. Does the wind load generator assume exterior surfaces or are the wind loads applied only to the beams and column areas? i don't see a setting to differentiate between enclosed…
RE: Generate Wind Loads
When the open structure option is chosen in STAAD.Pro, it would apply the wind load on the face of all members and not just on the members at the front face of the tower. However you can always control which members to load. Please refer to the post below…
RE: RAM Wind Loads
Actually we ignore the internal pressure altogether, because we assume the structure is a closed box and the internal pressures will always cancel each other out when it comes to the total lateral force for the MWFRS.
WIND LOAD MAP
Hi
I want to use the ASCE 7 2010 for low rise steel buildings but the problem is that some times i need to design buildings in other countries (Africa ). So the question is :
1- How to get the basic wind speed to use for ASCE 7 2010 in other countries…
RE: wind loads on walls with varying heights in ram
Regretfully our wind load application is fairly simplistic. The slope of the roof is not fully accounted for and the parapet is only a constant dimension per story.
The RAM Frame - Wind Loads FAQ clarifies these points. Ultimately, using User Defined…
I am receiving errors. "...floor diaphragm is present in the model. Wind Load definition should be defined after Floor Diaphragm definition..."
I am having so many error and warnings everytime I run analysis.. PLEASE HELP ME...
68. DEFINE WIND LOAD
*** NOTE: If any floor diaphragm is present in the model Wind Load definition should be defined after Floor Diaphragm definition. Otherwise…
RE: Wind Pressure using Flexible diaphragm vs. Flexible-Psuedo Diaphragm Analysis
You get a different frequency values and that affects the Gust factor which, in turn, affects the total pressure. You may want to manually specify the frequency for the wind load in advance when using flexible diaphragm types Check our post on Pseudo…
RE: RAM Frame Story Shear with Multiple Diaphragms
When the diaphragm is pseudo-flexible, the location of the graphic for the diaphragm shear is largely irrelevant. This wiki indicates that it's somewhere near the geometric center.
If you look at the building story shear report, you'll see 4 lines in…
RE: RAM Frame ASCE 7-10 Wind
ASCE 7-10 uses an ultimate wind load type, but the program is asking the user to input basic wind speed, V,see Section 26.5.
wind load definition for z-up condition
hi,
i am using model with z-up co-ordinate, while defining the wind load along horizontal direction, staad wind load shows only x or z direction in the dialog
but my horizontal direction is y, if i apply the factor load in z-direction it is applying…
Undergraduate modeling 5 story structure in RAM Structural System
Hello all,
I'm an undergraduate modeling a 5 story building in RAM Structural System for a structure class. I have several basic issues:
1. Load inputs: Snow = 30 psf, LL = 100 psf, DL = 3000 kips
QUESTION: Do I differ the loading between Floors…
RAM Structural Wind
Designing a Warehouse with intermediate wind girts around the perimeter, and intermediate wind columns. Do these wind girts have to be created on its own level, do they need to be considered as part of a frame system? I guess whats the best way to model…
RE: RAM SS - Windward and Leeward sides got swapped
I ran a test model using your wind load parameters and version 14.06.01. My model has a rectangular plan, much like yours, and semi-rigid diaphragms, but in my case for Wind in the X direction, the left windward edge loads are significantly higher than…
RE: Loads from RAM Frame (RAM SS) to RAM Concept
What matters most here is the Ram Concept - Criteria - Loadings tab settings. For each imported Wind load case, Concept will designate it as a Service Wind type (for old wind loads or user defined loads out of Frame) or an Ultimate Wind load (for modern…
RE: Wind Load Application
I assume this is a STAAD.pro question, but I think I can answer in general terms. If the wind loads are applied to a floor, then the (rigid) diaphragm itself probably transfers the forces into the MWFRS. But if the loads are applied directly to the beams…
RE: Importance Factor in Ram Frame
When you create (or change) a Code Specific lateral load in RAM Frame you are presented with a dialog box that includes things like Wind Speed and Importance factor.
The ASCE 7-10 manual changed things, however. Now there is no Importance factor for…
STAAD - Box Frame - Error in design
Dear fellow users, I am trying to design in STAAD a BOX FRAME for a structure. This box frame has an intermediate (smaller) restraint beam which helps for stability. When running the analysis with the necessary loads, it seems that this intermediate beam…
Structural Design for steel structure with barge deflection and high wind force
Dear Bentley Users,
I've been helped a lot with this forum. So I need you guys' opinion in designing this steel structure, which is a lot difficult issue for me..
Here's going to be Huge PIperack for the gas plant, and the designed equipment with…