I am looking to perform a response spectrum analysis with a given input PSD. However, while I see the option to add a response spectrum in the step menu I have no been able to figure out how to define the input PSD values. Can anyone help me out; I have scoured the help and not been able to...
Sorry. It was simply that the element I had created was skinny enough that one node was outside of the line between two other nodes. This basically created a negative volume in one portion of the shape. Thus, while the overall volume of the elemenet was positive and the nodes were all...
Every time I attempt to run a modal analysis on my model I get the error message:
* * * E R R O R * * * (WHILE RUNNING ANALYSIS)
NEGATIVE JACOBIAN ENCOUNTERED,
CHECK ELEMENT CONNECTIVITY AND JOINT COORDINATES FOR ELEMENT 21491
I have checked and this element has 8 points all of which are...
Thanks a lot for your suggestions masomenos.
I defined the steady state loading function according to a function that describes force input by the actual shaker that was used on the damn. This is a discontinuous function but SAP2000 seems to have dealt with this just fine when it graphed the...
I am trying to perform a steady-state analysis on a dam model that I have created in SAP and unable to get results that make any sense at all. I am trying to mimic the excitation of the dam with a shaker but when I put a joint load on it of approximately the same input force in the default...
