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THX！ However, my friends use this code and solve the problem, could u see why it works? # define gravity pattern Plain 1 Linear { load 12 0 -1000 0 load 22 0 -1000 0 } # Gravity-analysis: load-controlled static analysis # define parameters of gravity set Tol 1.0e-4; # convergence tolerance for test ...

Hi everyone I am doing a pushover anaysis As long as the gravity load is 0, everything will be OK. However, when I apply the gravity load, the gravity analysis will not converge no matter how small it is !!! Could someone give me some advice? THX!! wipe all; # clear memory of past model definitions ...

THX！I will have a try

> #HingeRadau > set interiorhingeSection 11; > set interior 10; > section Elastic $interiorhingeSection $Es $A_col [expr $beta1*$I_beam]; > section Elastic $interior $Es $A_col [expr $beta2*$I_beam]; > > set Locations "0 [expr (8.0/3*$Lp_Beam)/$LBeam] [expr > (4.0*$Lp_Beam+($LBeam-8*$Lp_Beam)/2...

f.ribeiro wrote: > 1) The initial stiffness of the element is supposed to be controlled by the > elastic element. Maybe you should look at the EI you are using to define > the elastic element. > > 2) It wasn't me that posted this example so I am not the right person to > talk about it. I will let ot...

Thank u for your help, and now it's too late in my timezone I get to bed, and I would try your method tomorrow.
Really thanks, your answers solve a lot of my question ^ _ ^

1）This initial stiffness is to describe the hinge. In this step study I would get the rotation and moment of hinge. If I use n*E*I/L (n=10) for hinge stiffness the tangent (which means the elastic stiffness of hinge ) showed in moment-rotation figure is too large. So I directly define the hinge rota...

Thank u very much! No words could express my feeling now because no one could help me around my side, so I am really appreciated for your help! And I Still have some questions about how to define Bilin this material 1) this code is used to simulate a cantilever column with a plastic hinge (wide flan...

file of rotation hinge proc rotSect2DModIKModel {eleID E A K asPos asNeg MyPos MyNeg LS LK LA LD cS cK cA cD th_pP th_pN th_pcP th_pcN ResP ResN th_uP th_uN DP DN} { # Create the material and section uniaxialMaterial Bilin $eleID $K $asPos $asNeg $MyPos $MyNeg $LS $LK $LA $LD $cS $cK $cA $cD $th_pP ...

This is the beam with plastic hinge model # Units: N mm second ################################################################################################### # Set Up & Source Definition ################################################################################################### wipe...

This is the concentrated model # Units: N mm second ################################################################################################### # Set Up & Source Definition ################################################################################################### wipe # clear me...

Thank you for your reply ! You are so nice!
Could i send an email to u so that I could describe the problem in detail with pictures and tcl files?

Hello everyone 1 It works well when I use concentrated plastic model ( bilin material); however, i use the same deterioration parameters with beamwithhinge element, the result would not have any deterioration. Could someone tell me why? 2 The plastic length of hinge we got from tests might be nearly...

f.ribeiro wrote: > You can record the moment at the element ends, where the plastic hinges > will form. The rotation is obtained by integrating the curvature along a > defined length so there is no rotation associated with the hinge section. > What you can do is to record the curvature at your hinge...

f.ribeiro wrote: > The paper by Scott and Ryan (2013) only addresses the case of > elasto-plastic material with hardening. In the case you have a softening > region, the second paper proposes a calibration procedure for force-based > beam column elements. Hope it helps. Excuse me, are there any comm...