PLATE ELEMENT DESIGN

[vivaraj]

Our recent urgent requirement is to design a retaining wall or an underground tank. This tank is modelled using plate elements and design parameters that are available for BS8110 & BS8007 were used for element design. But we find that the axial tension (Sx & Sy) are not included in the design of reinforcement. Also, the shear forces (Qx & Qy) are not taken care. Kindly advice, if there is any option to include Axial forces and Shear in Element Design (both using BS8110 &BS8007). Your suggestion on any other method of design (of Walls) in STAAD which includes these forces will be appreciated.

 

[JoshPlumSE]

You should also inquire if the Mxy moments are included in the design in any way? I've seen a couple of design programs base reinforcement design on Mx moment alone or My moment alone....

I'm never been much of a STAAD user, so I don't really know what they do. But, I do know that the the Mxy moment does contribute to bending stresses for BOTH directions and should be combined with the Mx and My moments in some way.

Alternatively, it is possible (sometime preferable) to directly use the plate's nodal forces for the design.

 

[RahulLeslieAlexander]

I heard (from a STAAD marketing person) that STAAD uses wood-armer method. If so, it would incorporate Mxy in the design. However, I haven't yet checked with the help or manuals as to whether STAAD does use wood-armer method.