Staad Plate

[zbizafar]

I am having problem analysis a 600 x 600 x 10 mm plate in staad. with only self wt the stress are so high. I am attaching the staad input file, please check and inform what i am doing wrong.

The plate is intended to be a chequered plate cover over underground Pit.

Staad Plate

Code:

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[triance]

I saw the model and didn,t find any problem. You have to choice which result you want. Here are some fig to explain staad plate result.

[zbizafar]

I have attached the absolute value from staad, i know you can check for different stresses but i can't understand how a 600 mm long plate with self wt only can have such high stress values. if you see in the model almost all stresses are very high. Maybe i am looking at it in a wrong way but i am confused.

Thanks,

[zbizafar]

I am sure many people here know the solution to the problem, please make time and reply.

Thanks

[seb3k]

You made an error in syntax while adding self weight load
it should be:

LOAD 1 LOADTYPE None TITLE SELF WT
SELFWEIGHT Y -1

replace theese 2 lines, keep everything else the same and it works perfectly (ran it in staad2007).
deflection is about 0.02mm