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Dear Vesna, I was trying to model the shear keys on a bridge bent. A super small part of code is below. My assumption is to bond, bearing material in transverse direction and also the shear key effect as parallel materials. By the way for sure I use displacement control PO. In ElasticPPgap material ...

Dear Frank, Vesna My question will be about the localization issues of deformation in forcebased element of opensees. Lets say you have a nonlinearbeam with a fiber section. I think, the number of integration points assigned will affect the hypothetical plastic hinge length. So if I increase the num...

Dear Mousa,

I have the same problem that you had. If you solved it, please let me know.

Regards,
Murathan

By fixed I mean translation in both transverse and long direction is fixed. So at both side the deck in transverse direction deck nodes will be moving together with the pier cap center.

Hi Vesna and all, I am modelling a 3 bent and 5 pier per bent simply supported RC bridge. The superstructure consists of I beams. The I beams rests on the fixed steel bearings which are located on the cap beam. I modelled the piers with nonlinear beam column and assigned rigid offset till the middle...

Hi Vesna and others, I am doing a multi modes pushover analysis. As you know, I apply each time a different pattern on the structure. My problem is: each time, I have to start pushing from the undeformed state of the structure. Is there anyway to do it without exiting each time. By exiting, I mean w...

Dear Vesna and All, I am confused about the recorder: recorder Element -xml PierforcesSec1.out -time -eleRange 1 10 section 1 force recorder Element -xml PierforcesSec1.out -time -eleRange 1 10 section 1 force In 3D, it gives, P MZ MY T VY VZ. When I check the results for integration points at top a...

vesna wrote: > If the system is linear defining $betaKinit or $betaKcomm will give the > same result. If the system is nonlinear you have to be careful when > defining rayleigh damping. > > How did you define damping in SAP? Mostafa and vesna thank you for your helpful answers. Vesna, as you said in...

Dear Vesna, All I was comparing an elastic cantilever LTHA in Opensees with LTHA in SAP2000. I assume the only damping model in OS is rayleigh. I defined 0.02 percent damping and in sap2000 I also defined 0.02 percent constant damping. The results came out to be different. To check I ran the analyse...

Hi Vesna and all, In modelling of a column, I use zerolengthsection element to take care of the strain penetration at the bottom of the column. Its a 3d model. I am confused about constraining the bottom and top of the zerolengthsection element. I use equalDOF 1 2 1 3 5; So I constrained no 2 node t...

Hi Vesna and all, In my opensees modelling documents, I have been using SI type unit source. I tried to add also the slip simulation for the bottom of column through uniaxialMaterial Bond_SP01 and zerolength section. However, when I run opensees has a warning "use ksi and in for strain penetrat...

Dear Vesna, I performed pushover analysis on a 50m column with nonlinearbeamcolumn element. To see what it differs I performed the analysis with 5 element and only with one element. When I push the 5 element model, at a top level displacement of 2.28m the analysis fails and opensees gives notices 'B...

Dear oleviuqserh, Thanks for your post. I appreciated your help. Now it works for concrete04. However, can you please clarify smt for me. I dont know if you runned my script or not. But the problem was at the very beginning of PO analysis. It is not cyclic and doesnt have unloading. So I think it sh...

Dear Vesna, Im sorry for bothering again. However, I tried all your suggestions but still when the eps2c is -0.0055. It doesnt converge. Analysis stucks at the very beginning of lateral load. Please give me a hand. Thank you very much for everything. Note:Im already using the latest version. Murathan

Dear Vesna, Thanks a lot. And sorry I couldnt explain myself at my 1st question well. Anyway, I got it. I face to another problem and couldnt solve it. When Im pushing a simple column with exactly the same materials concrete02 and hysteretic material. All the specifications are exactly the same but ...