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STAAD Pro SS6 - Composite Deck design example

August 8, 2017, 1:38 pm
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I'm using STAAD Pro SS6 and my building has composite steel beams with a lightweight concrete deck.  The building has a radial (curved) column grid so the beams are not at right angles to each other.  Does this affect the calculation of the composite effective flange width of the beams?  I am getting a lot of warnings stating that "CW of 0.0 Entered".  I didn't enter this value so I'm assuming the program is inputing 0 since the distance between members varies along the length.

I can upload my model if need be.  Does anyone have a good example of a project where the composite deck definition is used correctly? 

Thanks.

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Inconsistencies in deflection checks, DFF, unity ratios?

August 9, 2017, 1:08 am
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Hello,

I'm working on a model and am having some issues with the deflection check. I've attached a picture. So as you can see from the picture, I have a unity ratio of 1.178 under Deflection Clause, in member 36 for LC 603. The beam is 10m long and has DFF of 350 assigned. It's a single line member (i.e. no intermediate nodes in the member and no need for DJ1/DJ2 commands). If I view this member, annotate the deflection it shows deflection 38.916mm. The deflection at the end nodes is 5.294mm and 5.211mm. So the max. local deflection is 38.916 - (5.294 + 5.211)/2 = 33.664mm. Allowable deflection is 10,000/350 = 28.571mm.  33.664 actual / 28.571 allowable = 1.178, which is my unity ratio. So far so good. However, if I go into the Beam window by double clicking on the member, then go to Deflection tab and look at local deflection for LC 603, it shows a maximum deflection of 76.323mm! Why is this so different, and why is it not being picked up in the unity check? Thanks in advance for any answers!

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Report Viewer Control Issue

August 9, 2017, 11:40 am
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I am receiving error messages when I attempt to open reports in RAM Frame Analysis. The first message (see 'Error Message 1' attached) states that the 'Report Viewer Control' has not been registered on my computer. After following the instructions listed here, https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/10400/ram-steel-report-viewer-error, I received a second error message (see 'Error Message 2' attached). This one states that the registration failed due to error code 0x8002801c. Does anyone know what this means?

Thank you!(Please visit the site to view this file)

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Ram connection - Directly Welded W beam to HSS column

August 9, 2017, 1:04 pm
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Hi - 

I am designing a moment connection between W beam to HSS column using direct weld. 

It seems like that Ram connection does not consider the workable flat of the HSS section, and assumes that the beam flange width is the length of weld.

Even at cases were workable flat dimension is less than beam flange width. The length of weld usually impacts the capacity of weld. 

I wonder if this issue is resolved in most recent/future ram connection version. 

Thanks.

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MSTower Welded Connection

August 9, 2017, 9:00 pm
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Hi,

I am modelling a 3 faced tower which has horizontal and diagonal bracing members welded to the tower legs. When I run the non-linear analysis there are ineffective or buckled members. I checked the member forces for the brace members which are circular bars and they have no forces. I suspect the brace members have not been accounted for in the analysis leading to ineffective members during the analysis.

 Help on this will be much appreciated.

 I have tried to attach the MSTower model but get errors.

Thanks.

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Whats new in STAAD.Pro Advanced?

August 10, 2017, 12:23 am
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Hello everyone!!!

SP( Staad.pro), SPA (Staad.pro Advanced), SPCE ( Staad.pro Connect edition)

1. Is SPA & SPCE are same?

2. Whats new in SPA compare to SP SS6?

3. Is any additional country code, Extra tools added in SPA or SPCE?

Thanks in advance.

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What is the difference between a plate loads, area and the surface loads?

August 10, 2017, 3:13 am
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I have got a structure with beams and columns with enclosed plates. Inside this structure there is gas with some pressure. I would like to add this pressure to the surfaces (plates) of the structure but I'm not sure which load to apply. I think plate loads -> Pressure on full plate is the most appropriate one. 

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Plate Element Results In Staad Pro.

August 10, 2017, 4:14 am
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Hi,

Can you please tell me what are Min and Max results of plate element(please see attached image below)

Thank you

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STAAD FOUNDATION ADVANCED

August 8, 2017, 4:30 am
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1) When I view the base pressure contour lines, I see base pressure values such as -14.4 E9 ksf which does not make sense. Also, these values (displayed on the model screen) are too different from the maximum and minimum base pressure in the output. The output tells me that the maximum base pressure in 7.52 ksp and that the minimum us 0 ksf. Also, when I toggle between different load cases, this base pressure legend values do not change. I expect the base pressure legend to vary for each load case to reflect the soil pressure for each load case. 

2) In the output, it shows me the maximum base pressure value as 7.52 ksf for load case 2 and 0 ksf for load case 1. What about base pressure values for other load cased? 

3) I thought that the self of weight of the mat should be applied to a primary load case and then it will be included in the load combinations as part of the primary load case it was added to. When I do that, I get a warning telling me that the self weight of the mat is not added to any of the load cases/combination except that primary load case it was added to. For, now I have this option turned off and applying the mat self weight manually.

The model is attached. I used other means to check the results of STAAD Pro and I am finding my mac bearing to be 3.94 ksf while STAAD Foundation Advanced is reporting different contradicting results as explained above. 

Thanks for you help. 

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Issues with STAAD.Pro CONNECT Edition.

August 11, 2017, 8:33 am
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Firstly, I like the new look to STAAD and was happy to see some semblance of software development for the cost of a subscription. Hopefully this new interface will also be rolled out with STAAD Offshore, which has not been touched since 2004, despite the continued annual subscription payment.

Unfortunately, my positive attitude towards the new look software did not last long. I’ve been using the software for less than an hour and have come across the following issues:

  • In Postprocessing/Results tab, how do you change the load case presented in the diagram. In the previous version there was a pulldown box, which allowed you to select different load cases or combinations and compare them pictorially. It is not clear in the latest version how to achieve this.
  • Access to the STAAD Editor and Run Analysis buttons is proving intermittent. Sometimes they are accessible other times they are greyed out. It seems the only way to reinstate them is to completely close the programme and reopen the model. As an example, if you select to ‘stay in modelling mode’ after running analysis, the STAAD Editor is not accessible, nor the STAAD Output button, or any of the Specification functions. I’ve tried this on three computers and two of the three exhibited this behaviour. Any assistance would be appreciated on this as the software is unworkable with this issue.
  • I like the option to have a black screen background setting under the Configurations tab on the start window, however this seems to be a failure when the text for node / beam numbers and utilisation etc. is still in a black font. Anyway to change this?

Any assistance of correcting the above would be much appreciated.

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Ram Elements Effective Length Factors

August 11, 2017, 9:14 am
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See the column and member restraints and fixities below. I have my K33 and K22 values both set to "0" and the K value type set to "Recommended". The Ram Elements help section says the following:

"For AISC and AS codes, if K has its default value of (0), the program will calculate the approximate values of K according to the respective code (AISC360 Table C-C2.2, AS4100 section 4.6.3)."

When I go to the design report, ram is taking both the K33 and K22 values as 2.1 which is the K factor for condition (e) on the table ( see below). If this column is pinned at the base (not fixed) and pinned on top (not free to rotate and free to translate), why is it choosing a 2.1 factor instead of 1.0 for condition (d)? Thanks.

  

 

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Shrinkage strain in Ram concept according to AS3600

August 13, 2017, 6:06 pm
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How to calculate the shrinkage strain in Ram concept according to AS3600, thank you

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Dynamic Analysis Equation

August 13, 2017, 8:05 pm
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Can I extract Stiffenes Matrix Equation and Mass Matrix Equation from Model that I have made?

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OpenSTAAD Function "Output.GetMinMaxBendingMoment"

August 14, 2017, 9:15 am
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Please help...

OpenSTAAD Function "Output.GetMinMaxBendingMoment" returns 0 values while successfully executed (returned "true" value). I double checked the member no, strDir = "MZ" and lLoadCase; all are okay.

This function is used in the example included in OpenSTAAD folder under the installation directory (concretebeam). As a side note, both GetMemberEndForces and GetMemberIntermediateForces are working well. However, it is difficult to capture both min and max values using these two function.

Thank you

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RCDC for ACI code on rebar strength fy = grade 40 or grade 33

August 15, 2017, 3:34 am
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Dear ALL

Hope this is the correct forum i log in. 

regarding for Staad RCDC (Aci code), is it possible to ADD rebar strength = grade 33 to 40 or 220 to 275 Mpa? as noted it allows only from Fe410 to Fe 500

 

appreciate for replies.

Thank you

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STAAD Composite Steel Beam Error

August 15, 2017, 6:51 am
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I am trying to analyze a composite steel beam in STAAD and keep getting an error that says design of section for member is not supported.  Here is my input. 

STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 15-Aug-17
END JOB INFORMATION
INPUT WIDTH 79
UNIT FEET KIP
JOINT COORDINATES
1 0 0 0; 2 20 0 0;
MEMBER INCIDENCES
1 1 2;
DEFINE MATERIAL START
ISOTROPIC STEEL
E 4.176e+006
POISSON 0.3
DENSITY 0.489024
ALPHA 6e-006
DAMP 0.03
TYPE STEEL
STRENGTH FY 5184 FU 8352 RY 1.5 RT 1.2
END DEFINE MATERIAL
MEMBER PROPERTY AMERICAN
1 TABLE CM W12X26 CT 0.333 FC 576 CW 11.5 CD 0.15
CONSTANTS
MATERIAL STEEL ALL
SUPPORTS
1 PINNED
2 FIXED BUT MY MZ
LOAD 1 LOADTYPE Dead TITLE DEAD LOAD
SELFWEIGHT Y -1.05
MEMBER LOAD
1 UNI GY -1
LOAD 2 LOADTYPE Live TITLE LIVE LOAD
MEMBER LOAD
1 UNI GY -1
LOAD COMB 3 GENERATED IBC TABLE1LLFA232 1
1 1.4
LOAD COMB 4 GENERATED IBC TABLE1LLFA232 2
1 1.2 2 1.6
LOAD COMB 5 GENERATED IBC TABLE1LLFA232 3
1 1.2 2 1.0
LOAD COMB 6 GENERATED IBC TABLE1LLFA232 4
1 1.2
LOAD COMB 7 GENERATED IBC TABLE1LLFA232 5
1 0.9
PERFORM ANALYSIS
PARAMETER 1
CODE AISC UNIFIED 2010
BEAM 1 ALL
RBH 0.5 ALL
TRACK 2 ALL
RATIO 1 ALL
METHOD LRFD
FYLD 7200 ALL
FU 9360 ALL
CHECK CODE ALL
FINISH

Please let me know where I have an error.

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Section Wizard - Shear center of built-up column

August 15, 2017, 7:41 am
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Can the section wizard be used to determine the shear center of a built up section? I am evaluating an existing structure that has built-up columns (2 channels with a continuous plate on one side and laced on the other). I have made the built-up section in the Section Wizard but the properties do not appear to give the warping constant and shear center required to determine the compression strength in accordance with E4 of AISC specification.

Thanks!

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How can I get the RAM Connection User's Manual in Spanish?

August 15, 2017, 8:54 am
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Good Afternoon

How can I get the RAM Connection User's Manual in Spanish?

I need  the RAM Connection User's Manual in Spanish

Regard,

Pablo Mata

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GENERATE Command

August 15, 2017, 10:26 am
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When the GENERATE command was introduced in SELECTseries 4, the manual stated that it was to be used in conjunction with design codes ASME NF, AISC 360 05/10 for appropriate sign/direction for ABS/SRSS Combinations.  Our current project requires us to use AISC 9th Edition (ASD).  Will the GENERATE command work with this version of the code?  If so, what versions of STAAD.Pro is the GENERATE available with AISC 9th Edition?

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Gusset plate of bridge connection

August 15, 2017, 10:38 pm
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Dear Sir,

Can I made model of bridge connection with splice plate and gusset plate as in figure 1.

and all with gusset plate as in figure 2. (see my attchment) with RAM Connection?     Thanks a lot.

(Please visit the site to view this file)

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