In my example the CR location is irrelevant, I'm doing an equilibrium check for a summation of moments about the vertical Z axis at the point of the applied load Fx.
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RE: RAM Frame distribution of wind loads in a rigid diaphragm accounting for changes in stiffness in shear walls caused by openings
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RAM Frame distribution of wind loads in a rigid diaphragm accounting for changes in stiffness in shear walls caused by openings
I am trying to understand if RAM Frame takes into account the effect of openings in concrete shear walls on their stiffness when distributing story shears in a rigid diaphragm due to wind loading. To determine this I have modelled a square building, one side of which has shear walls with very large openings and on the opposite side of which it does not have openings. It has 3 floors all with rigid diaphragms. I then evaluate the shear induced on the walls by wind load in the direction of the shear walls with openings and without openings. Unfortunately, I have been alarmed to see that the shear forces are the same on each side... if there are 3 shear walls on 3 sides of the building. However, if I add a 4th shear wall, the walls with openings take on less shear than the walls without openings as expected! It is very strange. Adding another level of confusion is that the Center of Rigidity is very clearly in the right place and is taking into account this change in stiffness for both the 4 walled system and the 3 walled system. But, unless I specify a special load case for the CR, the button does not turn on, which indicates to me that RAM Frame does not compute torsional forces about the center of rigidity. Is it computing them about the COM? Essentially, I have two questions:
1. Does RAM Frame account for the change in stiffnesses due to wall openings when distributing lateral forces due to wind in systems with rigid diaphragms?
2. How does RAM Frame compute torsion for these systems? If not about the COR, why not?
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RE: STAADPRO PHYSICAL MEMBER PROBLEM
Hello!
The following are the member numbers I intend to create physical member.
1857 To 1859
Thanks in advance,
Mark
The following are the member numbers I intend to create physical member.
1857 To 1859
Thanks in advance,
Mark
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WHAT IS THE USE OF RELEASE AND WHY DO WE PROVIDE IT?
RELEASE
GEOMETRY_BEAM_RELEASE
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RE: STAADPRO PHYSICAL MEMBER PROBLEM
Nodes 1365, 1367, 1387 and 1300 are slightly not in the same line. To fix the issue, try the following steps:
1) Delete members 1857, 1858 and 1859 (nodes 1367 and 1387 should be left in the model);
2) Draw a new member between nodes 1300 and 1365;
3) Select nodes 1367 and 1387 and go to Geometry -> Break Beams at Selected Nodes.
Now try to create a physical member.
1) Delete members 1857, 1858 and 1859 (nodes 1367 and 1387 should be left in the model);
2) Draw a new member between nodes 1300 and 1365;
3) Select nodes 1367 and 1387 and go to Geometry -> Break Beams at Selected Nodes.
Now try to create a physical member.
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RE: STAADPRO PHYSICAL MEMBER PROBLEM
Hi!
Your suggestion really works.
Thank you very much.
Your suggestion really works.
Thank you very much.
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RE: Location of Zero BM
You can create your own code using relevant OpenSTAAD functions. For example, I have created one to print the zero bending moment location using the above mentioned OpenSTAAD function as shown in the following video.
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Location of Zero BM
Hi,
Could you please tell me how do we find the location of bending moment curve sign change(i.e., location of zero bending moment on the member) in Staad Pro.?
Thank you
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Importing 3D DXF to STAAD - Geometry Changes
Hi,
I am attempting to import a 3D dxf file to STAAD, and after importing, I noticed that the geometry is skewed from the actual 3D dxf file. I have attached the 3D dxf file. I did not post the generated STAAD file as the file was unable to open after I closed it.
Is there a way that I can get the correct geometry of my 3D dxf file? I am currently using STAAD.pro V8i SS5.
Thanks,[View:/cfs-file/__key/communityserver-discussions-components-files/5932/Importing-File.dxf:0:0]
Jacky
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RE: STAAD FOUNDATION ADVANCED DON'T SHOW THE RESULTS (ALL RESULTS ARE IN 0 VALUE)
I am also intingued and eager to see what happen with that file.
Are there any news on this?
Are there any news on this?
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RE: Ram steel
You just need to install Structural Synchronizer for the ISM commands to work in RAM.
You can download ISM Structural Synchronizer CONNECT Edition v.10.00.01.32 here:
https://store.bentley.com/products/iware/1000STRS--Structural-Synchronizer
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Ram steel
how do I install ism on my ram steel
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RE: BUILDING PLANNER IN STAAD PRO.V8i
You can also check the following video. Hope this helps you.
(Please visit the site to view this video)
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BUILDING PLANNER IN STAAD PRO.V8i
please could someone model a structure in staad pro. with the building planner window.
Thank you.
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RE: HOW TO VIEW A PARTICULAR ELEMENT IN STAAD PRO
I GOT IT THANKS TO SYE.I READ YOUR PREVIOUS REPLY TO SOME SANJAY ON JUNE 20 2017.THANKS
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HOW TO VIEW A PARTICULAR ELEMENT IN STAAD PRO
RECENTLY I WAS WORKING WITH STAAD PRO AND MISTAKENLY DIDN'T INCLUDE ELASTIC MODULUS IN ONE OF MY ELEMENT.NOW ITS TAKING TO MUCH TIME TO FIND THAT ELEMENT.SO I WOULD LIKE TO KNOW IS THERE ANY WAY TO SHORT MY PROBLEM.
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RE: Location of Zero BM
Thank you very much.
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RE: DATA SHOULD FOLLOW AFTER CONSTANT COMMAND AND NOT ANY OTHER TYPE OF COMMAND. DATA-CHECK MODE ENTERED.
You need to assign the material to all beams. To do so, go to General -> Material vertical page and assign the required material.
In addition, one PERFORM ANALYSIS command is enough in your model, so the others should be removed. Also, PERFROM DIRECT ANALYSIS command is not required.
In addition, one PERFORM ANALYSIS command is enough in your model, so the others should be removed. Also, PERFROM DIRECT ANALYSIS command is not required.
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DATA SHOULD FOLLOW AFTER CONSTANT COMMAND AND NOT ANY OTHER TYPE OF COMMAND. DATA-CHECK MODE ENTERED.
I'm designing this RC beam bridge per AASHTO LRFD specifications. It is designed for HL-93. I have created my model but everytime I run my analysis, I keep getting the subject error message. I am fairly new to STAAD so I've no clue what am I doing wrong to trigger that error. Any help is greatly appreciated.
Here's my input:
STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 28-Jun-17
END JOB INFORMATION
INPUT WIDTH 79
UNIT FEET KIP
JOINT COORDINATES
1 0 0 0; 2 20 0 0; 3 20 0 4; 4 20 0 8; 5 20 0 12; 6 20 0 16; 7 0 0 4;
8 0 0 8; 9 0 0 12; 10 0 0 16; 11 20 0 5;
MEMBER INCIDENCES
1 1 2; 2 7 3; 3 8 4; 4 9 5; 5 10 6;
DEFINE MATERIAL START
ISOTROPIC CONCRETE
E 453600
POISSON 0.17
DENSITY 0.150336
ALPHA 5e-006
DAMP 0.05
TYPE CONCRETE
G 193846
TYPE CONCRETE
STRENGTH FCU 576
STRENGTH FCU 576
END DEFINE MATERIAL
MEMBER PROPERTY
1 TO 5 PRIS YD 1.04167 ZD 4
CONSTANTS
SUPPORTS
1 7 TO 10 PINNED
2 TO 6 ENFORCED BUT FX MX MZ
DEFINE MOVING LOAD
TYPE 1 HS20 1
TYPE 2 H20 1
TYPE 3 LOAD 25 25
DIST 4 WID 6
LOAD GENERATION 200
TYPE 1 0 0 6.5 XINC 0.1
TYPE 2 0 0 6.5 XINC 0.1
TYPE 3 0 0 6.5 XINC 0.1
LOAD 201 LOADTYPE Dead TITLE DL
SELFWEIGHT Y -1 LIST ALL
LOAD 202 LOADTYPE Dead TITLE Lane Load
MEMBER LOAD
1 TO 5 UNI GY -0.0533 0 20
LOAD COMB 203 COMBINATION Dead and Lane
201 1.0 202 1.0
PERFORM ANALYSIS PRINT ALL
PERFORM ANALYSIS PRINT ALL
PERFORM ANALYSIS PRINT ALL
PERFORM ANALYSIS PRINT ALL
PERFORM ANALYSIS
DEFINE ENVELOPE
201 202 ENVELOPE 1 TYPE STRENGTH
END DEFINE ENVELOPE
PERFORM DIRECT ANALYSIS
FINISH
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RE: HOW TO REDUCE DESIGN MOMENT IN STAAD PRO
I SOLVED IT BY MY OWN.IF THIS KIND OF PROBLEM PROCEED IN STRUCTURE JUST TRY TO CHANGE SECTION DIMENSION AND RE-ANALYSE THE STRUCTURE AND KEEP DOING IT UNTIL IT BEST FIT THE STUCTURE.
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