The OpenSees Community

Dear colleagues,

I have a problem in defining the Uniaxial Material Model for the steel fibers in zero-length section element for the rectangular section column.

Apparently the bond_sp01 model is not applicable for rectangular sections! Please, is there another solution?!

I appreciate your help.

Dear colleagues,

what is the model used to simulate the steel fiber in zeo-length section element for the rectangular section column?!

I appreciate your help.

Dear colleagues; I want to do a transient analysis and split the increment into two parts. The first calls for the first file (for a coarse discretization) and the second file (for a fine discretization). For that the program written below does not work, can you help me please! for {set i 0} {$ i <=...

Dears friends, How can be define 'tension strain in extreme tensile steel fiber' for column fiber FE model ?! Is it defined as follows ?! recorder Element -file SecSteel.out -time -ele1 section1 fiber -$ro 0. $IDreinf stressStrain (ro=Diameter/2) Please, your suggestions will be very useful for me.

Dear colleagues,

I am wrapping up Reinforcing Steel material with a fatigue material to use in RC column.

Please, How can i calibrate (or calculate parameters) fatigue material variables for ajusting it for this material?

I appreciate your hep.

I'm looking for how to compute ultimate strain of confined concrete (ecu) with Mander model (Those equations demand a iterative procedure) !!!

I will be very grateful if you can share with me the program for the iterative calculation.

I appreciate your help.

Dear all, I’m trying to validate a fibre FE model that analyse the cyclic pushover response of 415 RC column of Lehman et al. [1]. In a general way, I followed the modelling strategy proposed by Wang et al. [2]. To model the confined concrete, I used Mander et al. model [3] to compute the compressiv...

Dear all;
I had this note while running my model RC column;

R is negative in ReinforcingSteel::SetMP()

and then the convergence failed using all methods.
Any idea please!

Thank you so much for your reply.

Dear colleagues.

There is straightforward way to calculate the energy dissipated through hysteretic cycles in cyclic response using Matlab or OpenSees Script?

I appreciate your help.

Dear colleagues;

I want to know how to model the transverse reinforcement when considering buckling and low-cycle fatigue in RC column ?!

I appreciate your help.

Dear colleagues, For modelling the RC column considering inelastic buckling of reinforcement. Authors use force-based Frame Element (two force-based elements). Are these two force-based elements modeled by distributed plasticity (nonlinear beam column) or the combination of two formulations (distrib...

Dear colleagues, I am running a pushover analysis using load-control integrator. I use the following load control procedure, set Tol 1.0e-12; test NormDispIncr $Tol 1000 ; algorithm Newton integrator LoadControl 10.0 analysis Static analyze 10 I usually change the 'integrator LoadControl' increment ...

Dear colleagues, To evaluate the OpenSees capabilities for shear-flexion interaction. What is the best way to use. Rotation based shear failure model (RotationShearCurve) with (PinchingLimitStateMaterial) that controls the degrading column behavior OR Shear spring at the bottom defined using the lim...

Dear mohammmad,

thank you a lot for your reply.
I am looking for how to define in OpenSees the following command for circular sections ?!!
limitCurve Shear $curveTag $eleTag $rho $fc $b $h $d $Fsw $Kdeg $Fres $defType $forType <$ndI $ndJ $dof $perpDirn $delta>.

I appreciate your help colleague.