Modelling technique masonry wall in STAAD pro

[Siva Thaya]

As the ground settle (sketch is attached), the masonry wall(brick wall) try to deform to follow the ground settlement profile. I tried to model the wall as plate element in STAAD model and apply enforce command to the support.The result is not in correct format (stress contour is attached). Do you have any idea how to model it in STAAD Pro correctly and what commands should be used?

 

[r13]

This is not program's problem, it's the modeling technics.

Questions and notes:
1) It looks like you are using pinned support instead of compression only spring support, why?
2) What are the loads that causing such rotation? Lateral load shouldn't be used in the initial study, until you are satisfied with gravity load (weight) cases only (usually heavy downward force at end supports, and lighter in the middle).
3) It looks like you have sensitive soil (maybe silty) below, do you have soil report?
4) What is groundwater elevation, and unusual fluctuation, or under flood condition.
5) Do you have survey data that reflects the deflection/settlement as shown on the sketch?
6) Is there visible distress/cracks around the building? What you want to gain from the model study, and what you want to accomplish?

 

[Sye123]

Using enforced support is the correct approach. Please make sure that you are putting in the settlements with proper signs at the right support locations. Also since plate stresses are reported with respect to local axes of plates, please make sure that all your plate local axes are oriented the same way and SX is actually the vertical stress.