I've been trying to use the parameter command for element loads and I get the following error when I run a FORM analysis:
the norm of the gradient is zero.
The commands I'm using are as follows:
parameter $Paramtag randomVariable $RVtag loadPattern $LPtag elementLoad $eltag wy
parameter $Paramtag randomVariable $RVtag loadPattern $LPtag elementLoad $eltag P
I do not get any error when assigning a parameter to a nodal load. Do you know what the probem could be? Is it possible that these commands only work for certain types of elements?
In relation to the parameter command for an element point load, I notice that in one of your past lectures you specified that the last argument can be Px, Py or xOverL. Surely you need to specify all of these variables for an element line load?
It seems I can get the linear element load working for 2D but not for 3D. I am using elastic elements in 3D. Should it be possible use the parameter command for these elements?
I still cannot make sense of the parameter command for element point loads.
addToParameter 1 element $i section 1001 fibersection 1 material 1 fc
addToParameter 2 element $i section 1001 fibersection 1 material 2 fy
(1001 is the section tag for section aggregator and concrete 01 and steel 01 materials are used)
addToParameter 3 loadPattern 2 elementLoad $j wy
Have you found some information about this issue? Thanks in advance.
mattresses, mattress, dining table set, office desk, home office desk, counter height table, dining room table sets, counter height dining set, 5 piece dining set, dining table chairs, desk with storage, cheap dining, table set, counter height dining table, dining room furniture, 3 piece dining set, adjustable bed base, kids bedroom furniture, dining table and chairs, dining room table and chairs, home desk, cheap dining room sets, small office desk, dining table height, high dining table, black computer desk, office desk furniture, room desk, wooden dining table set, 5 piece counter height dining set, counter height table sets, table and chair set, round dining set, dining set for 4, round dining room sets, 5 piece round dining set, dining furniture, dining table and chair set, home computer desks, queen adjustable bed, dining table set for 4, counter height dining table set, counter height kitchen table, office computer desk, dining room table chairs, dining room furniture sets, black, office desk, 5 piece dining table set, round dining room table sets, counter dining table, kitchen counter table, cheap dining room tables, office desk with drawers, dining room table and chair sets, 5 piece dining room set, 4 chair dining table set, dining table with bench and chairs, 4 piece dining set