Hello,
I have been working on blast analysis on steel structure building on one of my projects,
On design basis direct analysis method and ASCE blast load is required to be used during building design
I have been trying to use direct analysis method using time series blast load case but the STAAD software always resulting in error during analysis if direct analysis is performed, while the analysis is running fine if direct analysis is not used.
My question is as follows:
Can Blast analysis (time series-force) performed using direct analysis?
Thank you inn advance,
Best Regards
Florian O
It would not be appropriate to do a direct analysis with a time history loading. Instead what you can do is a Direct analysis for all other cases and then analyze the time history loading using a PDELTA KG. That accounts for the pdelta effects in the eigensolution. Subsequently one can use load combinations to combine the effect of the time history loading with the other load cases. I have attached a sample model demonstrating this. Although the time history loading is a harmonic function in this case however it would be the same for a blast loading as well which will essentially be a force vs time input.
Time History+Direct_Analysis.std
I cannot think of a better option than this for now.
Sir I have considered a RCC Frame structure and by using IS 4991-1968 I have calculated the blast parameters required and finally calculated Force in Kilo Newton for the Pressure on Front Face and no Pressure on Rear Face. Now I know only one point that blast loads are applied on the structure using Time History Loading in Staad Pro.Now please help me out how to give blast loading in Staad with detailed procedure or else a manual for giving blast loding using Staad. How to give Time History of Loads at Nodes ( Charge Weight-100 kg , Stand off distance - 30 m)
Sir currently iam undergoing a Thesis on Blast loading on RCC Structures using Staar Pro. Actually analysis part is completed and iam getting trouble in which results are to be taken. Blast load is evaluated on the structure using time history analysis.In Post processing mode- Dynamics - Time Displacement ,Time Velocity,Time Acceleration can be seen with variation of time.For every storey i was getting the displacements,velocity and acceleration in 3 directions x,y,z.How to take the maximum of these three graphs pls help me out sir so that I can move further in my career development
hello sir,
even i have the same doubt.. could you please help me..??
my email id is kanchin639@gmail.com
it would be kind enough if u help me..
thank you