RE: Period and Mass participation of the building in RAM SS
30 modes (using the improved Lanczos solver which is new in version 15) yielded great results, well over 90% in both directions.
View ArticleRE: Period and Mass participation of the building in RAM SS
Thanks Seth, I'm updating my version of RAM SS now. Could you advise on few items: - how to engage Lancros solver - which values you've got for 1st and 2nd mode of the building - I've tried to change...
View ArticleRE: Seismic analysis
sir, Whether any possibility of modelling my above requirement of encased column?? Pls. check my model and suggest the corrections.
View ArticleRE: Seismic analysis
It is not directly possible in STAAD.Pro. I'll give you some alternatives.
View ArticleRE: Period and Mass participation of the building in RAM SS
That solver option is under Criteria - General (the Ritz option is still pretty good too). The first period was right at 5 seconds and the 2nd just slightly shorter, as I recall. There are two factors...
View ArticleRE: Period and Mass participation of the building in RAM SS
Thanks Seth, This building is just 22 storey and I believe 5s is a very high period for it. I was predicting it to be in a range of 1.5-2.5 s Do you have any idea why would it be so high?
View ArticleRE: Seismic analysis
There is no such direct way to model the encased column in Staad. But still if you want them to be simulated in Staad then you can adopt some indirect trick. For example you have a composite member...
View ArticleRE: Seismic analysis
Thank you for your valuable suggestions. But i dont know how to calculate the section properties of a composite section. Can you pls send me the composite column added in my model .
View ArticleSeismic analysis
Sir, The below steel structure is analysed for sesismic loading.I modelled the foundation of structure using plate element and for soil structure interaction i followed impedance approach i.e. Soil...
View ArticleRE: AISC Strength/Serviceability check in design error in STAAD
Dear Mr.Amitava,Even without any input mistakes like "same load combinations in the list of Strength and Serviceability envelopes" im getting errorI used only Serviceability env. still below error...
View ArticleAISC Strength/Serviceability check in design error in STAAD
In STAAD 20.07.11.50 I used the following syntax for Strength/Serviceability checkDEFINE ENVELOPE11 ENVELOPE 1 TYPE SERVICEABILITY10 ENVELOPE 2 TYPE STRENGTHEND DEFINE ENVELOPELOAD LIST ENVELOPE 1...
View ArticleRE: Temperature load in STAAD (Thermal load of steel )
You have to know three temperatures : 1) the stress-free temperature, which is the temperature that the beam was at when it was constructed or installed. Call it A. 2) The temperature of the top fiber...
View ArticleTemperature load in STAAD (Thermal load of steel )
Dear Engineers,Im analysing a steel structure where I have to apply thermal load. below are the datas.Max. Temp 45 deg CelsiusMin.Temp -35 deg CelsiusSite Average maximum temperature : 36°CSite Average...
View ArticlePrinciples of Structural Analysis—Static and Dynamic Loads by kris sathia
hi kris ,i have purchased your book and really it is a great resources .in the note from the author section , you have mentioned that "This book, which is part 2 of a 3-part set" also it is...
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RE: Tapered Reinforced Concrete Beam
One can model the Concrete tapered I shaped section but it cannot be designed in Staad.
View ArticleRE: AISC Strength/Serviceability check in design error in STAAD
Yes. DFF is mandatory even if a serviceability load Envelop is specified.
View ArticleRE: STAAD FOUNDATION ADVANCED -Service vs Ultimate
Sye, Thank you for the response. I tried classifying every load case type as " Ultimate" and then I rerun the analysis. I still get an error for design that says:"Error: No Service stress load case...
View ArticleRE: Period and Mass participation of the building in RAM SS
Here are a couple of contributing factors. First you have set the cracked section factor on the walls fairly low (0.4 in plane), reducing the stiffness. Second you have P-delta analysis on, which in...
View ArticleRE: Tapered Reinforced Concrete Beam
Thanks for the reply, I am however trying to model a rectangular concrete section but I will try to manipulate the different sectional properties in the I-section and see if I can arrive at a suitable...
View ArticleRE: STAAD FOUNDATION ADVANCED -Service vs Ultimate
Jason, You can reduce the FOS so that sliding and overturning checks become inconsequential as you mentioned. Generally you would have some service cases which would be used for bearing and stability...
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