Dear all,
How much add value of stiffness in guide support tab during design of skirt support tall tower?
If I use fixed lug support as 0 stiffness, And after the same lug I need to design for upper portion of equipment with horizontal reactions or any different way to calculation.
Regards
PRAVIN
The guide support stiffness depends on the structural stiffness of the structure on which the equipment is installed. please ask the customer or the civil/structural group that is involved in the structural design work of the support. Also you can model it yourself using STAAD software for structural analysis.
mr sudip please call me on above number
+919921160295
Hello Pravin,
I had a meeting with Sudip, who had the following comment:
Normally the guide provides support for tall slender columns else if user does not know the stiffness value then best would be to assume no stiffness so no need of guides, you will get a conservative design as the vessel will have to withstand the whole lateral force like wind/seismic.
Again like all cases this is just a reference information, user must make use of his own engineering judgement and best practices. See webinar on Bentley Learn Server "load cases, wind, seismic design for tall vessel/column design".
Thanks for your time.
Regards,
Mike DattilioBentley Systems Design AnalystDesign Engineering Analysis group===================================================
Answer Verified By: Pravin NAIK
so you mean i will put zero value and run the programme
Due to liability lawsuits, Bentley cannot provide detailed values for use in modeling. The user is responsible for providing / confirming all data used in the model.
Sudip suggested that IF you do not know what the stiffness values are for a support, then to enter 0.00. The program will then help you design a tower with essential no elevated supports in the direction with 0.00 stiffness values. This deign may be conservative because, IF your real world design actually has support(s) but you entered 0.00 stiffness values in your modeled analysis the added actual support(s) would benefit the overall design of the structure.
Again, IF there are elevated guide(s) you have the following options:
1. Calculate or other to provide guide support lateral stiffness value(s) to be entered in the program.
OR
2. Enter guide stiffness values = 0.00 and the program will analyze the model assuming no support in the direction specified. Design maybe overly conservative.
The choice is yours.
Thank you for your time,