Concrete Tank in Staad

You can use the Hydrostatic option within plate loads to generate the soil pressure. Please refer to the screenshot below

I have attached the example10 mentioned in the post. I have actually added a load case 2 to the example which is a lateral soil pressure loading

EXAMP10.STD

Quick question - can you hinge the corners/sides of the tank in Staad?

Quick question - can you hinge the corners/sides of the tank in Staad?

To release the moments at the edges of walls it is better to define small dummy beam elements connecting the edge nodes of the wall to the corresponding nodes in the adjacent beam or plates and apply appropriate moment releases to the beam elements. One can define a new material for these dummy members having zero density and small E value so that these do not contribute towards additional loads or stiffness.

Dear Mr Sye, hope you are fine. I was trying to get connected with you on underground tank design without any inside water. Approximate size is 8m x 7m x6.5m depth inside wall to wall.  I am considering Self weight ,Motor operated Valve (MOV) as DL , Lateral active earth pressure all 4 sides , Hydrostatic subsoil water pressure on wall acting outside wall , and accidental full water load inside RCC tank due to leak , Surchage , LL on top slab. I need following support:

1) Which load combinations i should use.

2) What about buoyancy- is there any STAAD support for check.

3) Tutorial bentley videos 

Appreciate your prompt support and will wait eagerly