Dear all,

Presentaly, I am working on stress analysis of modular plant (Skid).
I would like to know following.

- What special consideration are taken or special measures are taken while doing stress analysis of modular plant when mode of transportation is by road ?

-Is there any kind of transportation effects are taken into consideration when mode of transportation is by road?.

Thanks.

More information

Module transportation is by truck and module shipping orientation is horizontal.

Search in this forum"Weight of the Truck on the Underground piping ",
http://65.57.255.42/ubbthreads/ubbthread...=true#Post62651

Dear Limin,

Intent of this thread is to know special consideration for stress analysis of modular plant when mode of transporation is by road (Truck) ? and not , consideration of live load for burried piping.

Anyone who knows about this type of analysis , please share knowledge / experience. This would be really helpful.

Thanks.

For modular construction of piping, I consider the equivalent G factor of acceleration due to transportation on sea, train, or truck, whichever has the highest acceleration. Input this G factor in CII just like seismic case. Piping model should be extended only up to the limit of module and should be empty. Analyze the system and check the stresses, support loads & deflection. Provide additional temporary supporst if needed.

for underground pipe live load, you can use
1, ALA
2, AISI AWWA M11,
3, PPI (Handbook of Polyethylene pipe of the plastic pipe institute)
4, CEPA equation (Warman Hart and Francini, 2009)
5, CSA S6-10 CHDB (Canadian Highway Bridge Design Code)
6, API RP1102
7, American Association of State Highway and transportation officials design Guide,
each method has their own focus,

Thanks Fkx for your promt reply,

I would like to have clarification on below points.

1) "I consider the equivalent G factor of acceleration due to transportation on sea, train, or truck, whichever has the highest acceleration.Input this G factor in CII just like seismic case."

- Why it is required to consider equialent G factor when the mode of transportation is Road ?

2) " Piping model should be extended only up to the limit of module and should be empty."

- Orientation of Module (Skid) during transportation is horizontal. Should I rotate the model in CAESAR in same orientation for transportation case analysis ?

3)"Analyze the system and check the stresses, support loads & deflection.Provide additional temporary supporst if needed."

- What is the type of loade case and limit of Stress for transportation case ? Is it same as Sustain ?

- What is maximum permissible limit of deflection for transportaiotn case ?

Thanks in advance. Please share your views / clarification / Knowledge sharing on above points.

Dear All,

Please share your experience / guidence for transportation (By Road) analysis of modular plant.

Thanks,

Have a Good Day.

This is a wierd thread.

Limin ... please stop banging on about buried pipe. That is not the question.

Nandishdave .... Why do you want to do stress analysis on this skid at all ?

1. It is not operating (I assume) therefore not under pressure or under any thermal load. I guss there is no contents weight either.

2. For transportation, unless you have a map of every bump in the road and the likely speed of the truck, you cannot do any meaningful dynamic analysis.

3. The usual solution to this sort of problem is to add temporary supports by visual inspection. Stop any cantilevered masses from moving, support any free ends, possible enhance some existing simple supports to be temporary stops / guides.

4. Paint any temporary supports red for positive identification !

Thanks MoverZ for reply.