problema ansys nonlineare

[simbaf]

Hello everyone,
I wanted to know if someone would kindly tell me if in ansys you can do non-linear analysis with displacement control (for example for a collapsing analysis). in case it is possible, what are the settings for analysis?
thanks to anyone who has the patience and kindness to respond.

 

[nicnoc]

do you mean pushover analysis typical for the structures of civil buildings?
is it not enough that once you notice the modal participation coefficients and the predominant modal form (usually it must be the first, because in the pushover at the end you discrete the mdof structure in a sdof structure), apply the distribution of horizontal loads that you have 0scelto (proportional to the mass, the first way to vibrate, triangular etc.) and then evaluate the shift of the applied control point?

Sorry, I suppose it's civil engineering or something, since you use sap2000

Hello, good evening.. .

 

[simbaf]

Hi.
I'm sorry, but I don't understand what the modal participation coefficients have to do with a pushover analysis, but this is not the point.
As I am a neophyte of ansys, I wanted to know if there is a way to conduct a nonlinear collapsing analysis with displacement control (with this I mean that at each step instead of increasing the loads you increase the shift of a control point, and you get the forces relative to the movements imprinted) this in order to grasp the behavior of the structure even after achieving maximum bearable load.

 

[nicnoc]

when you do a classical pushover analysis (with method n2, that of fayfar in substance, reported in ntc2008) you use modal participation coefficients (or factors) to convert the shift force curve of the whole structure (mdof) in an equivalent curve relative to a structure to a dof.

but excuse if you continue to apply strength even after your limit value does not continue your analysis?

 

[simbaf]

Okay, I'm sorry, but I didn't understand. Sorry.
the thing that I don't understand is how the tensions in the mat increase even if I set an elastic-perfectly plastic bond for the material. how do you consider that the material plasticizes?