Can anyone advise or may be have experience how to model trust blocks at GRE elbows.

The difficulty is that it should be monolithic block of concrete and where the restraints should be applied to model it is not clear.

When I try to put anchors at the elbow itself and at some short distance away from elbow at pipe the software shows very huge overstress at this location between two anchors.
When I try to anchor at elbow ends I also have overstress but not huge.

The question is if it is an artificial overstress... thus need to find better ways how to implement trust block.


Please share your opinions.

Regards
Zhambul