In cases where STAAD does not have a code that you want to design your structure with, you can use STAAD for the analysis part. Analysis is the process for obtaining results such as joint displacements, member forces, plate and solid element stresses, support reactions, etc. Example problem 10 in Help-Contents-APplication Examples shows a method for analysing these structures. The various loading conditions you mention can be simulated through positive/negative pressure loads (trapezoidal & uniform) on the appropriate elements.
You can then take those results and perform the design to your desired code either through hand calculations or through an OpenSTAAD Macro that you will have to create. The macro can be constructed to automatically fetch the results from the STAAD analysis.
I am practising with Indian Codes in which there is altogether a different code for designing Water Retaining Structures away from Limit State Design of IS 456. How can we design water retaining structures unless the relevant country code is supported by Staad? Permissible stresses for water retaining structures are not the the same as laid down in IS456. Design principles are also based on uncracked section. The condition of loading specially for underground water sumps are i)The tank is empty ii) The tank is full iii) The tank is empty, the surrounding earth is submerged iv) The tank is full and surrounding is submerged. Will you please throw some light how can we simulate the above loading conditions and design principles in Staad with sample example? I shall be highly grateful because enough time and labour is input for manually designing water retaining RCC structures.
Sure, you can analyze water retaining structures in STAAD.pro. I expect it's a fairly common use of the program. Our Help - Contents - Tutorial Problem 3 is a concrete flat plate structure that's not quite the same as water retaining structure, but a pretty good place to start learning how to use shell elements.
is it possible to design water retaining structures in staad pro ,if possible then how to design it plz explian mthanks in advance.