Rectangular tank bottom to shell joint design & seismic evaluation
Rectangular tank bottom to shell joint design & seismic evaluation
(OP)
Hello every body,
i have to prepare a calculation book for rectangular storage tank with following dimension (L * W *H) = 2500 * 2500 * 1500
Calculations for wall and bottom thickness and stiffeners size is base on this book : "Design of process equipment" ,By:Mahajan.
I have to offer calculation for the bottom to shell joint. i didn't have find any rules for it in ASME Section VIII. I will appreciate any help.
I am also involved in seismic design evaluation a the tank. in order to obtain base shear, first mode natural period of vibration should be calculated first. i will be appreciated if any one could suggest a procedure for finding natural frequency.
BR.
i have to prepare a calculation book for rectangular storage tank with following dimension (L * W *H) = 2500 * 2500 * 1500
Calculations for wall and bottom thickness and stiffeners size is base on this book : "Design of process equipment" ,By:Mahajan.
I have to offer calculation for the bottom to shell joint. i didn't have find any rules for it in ASME Section VIII. I will appreciate any help.
I am also involved in seismic design evaluation a the tank. in order to obtain base shear, first mode natural period of vibration should be calculated first. i will be appreciated if any one could suggest a procedure for finding natural frequency.
BR.





RE: Rectangular tank bottom to shell joint design & seismic evaluation
http://www.eng-tips.com/viewthread.cfm?qid=39705
Why must you "offer calculation for the bottom to shell joint" ??? In a rectangular tank, this will be an externally stiffened joint. This requirement sounds like something required for a round, flat bottomed tank. Did the client or some MBA boss require this ?
MJCronin
Sr. Process Engineer
RE: Rectangular tank bottom to shell joint design & seismic evaluation
Unfortunately, the the client don't have enough engineering sight and knowledge.
So, I have to prove for him that the joint is stiffened enough.