## Search found 56 matches

- Sun Sep 20, 2020 4:20 pm
- Forum: OpenSees.exe Users
- Topic: How to do a transient analysis and split the increment into two parts?!!
- Replies:
**1** - Views:
**546**

### How to do a transient analysis and split the increment into two parts?!!

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 <=...

- Mon Aug 17, 2020 1:29 am
- Forum: OpenSees.exe Users
- Topic: tension strain in extreme tensile steel fiber
- Replies:
**3** - Views:
**749**

### tension strain in extreme tensile steel fiber

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.

- Fri Jul 24, 2020 4:18 pm
- Forum: OpenSees.exe Users
- Topic: computing fatigue variables in Reinforcing Steel
- Replies:
**1** - Views:
**545**

### computing fatigue variables in Reinforcing Steel

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 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.

- Wed Jun 24, 2020 6:21 pm
- Forum: OpenSees.exe Users
- Topic: Compute ultimate strain of confined concrete (ecu)?
- Replies:
**0** - Views:
**514**

### Compute ultimate strain of confined concrete (ecu)?

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.

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

I appreciate your help.

- Sat Jun 13, 2020 2:52 pm
- Forum: OpenSees.exe Users
- Topic: Compute the compressive strength of confined concrete
- Replies:
**0** - Views:
**527**

### Compute the compressive strength of confined concrete

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...

- Thu Jun 11, 2020 7:14 am
- Forum: OpenSees.exe Users
- Topic: R is negative in ReinforcingSteel::SetMP()
- Replies:
**0** - Views:
**468**

### R is negative in ReinforcingSteel::SetMP()

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!

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!

- Thu Jun 11, 2020 7:12 am
- Forum: OpenSees.exe Users
- Topic: Energy Dissipation
- Replies:
**2** - Views:
**904**

### Re: Energy Dissipation

Thank you so much for your reply.

- Sat May 30, 2020 11:18 am
- Forum: OpenSees.exe Users
- Topic: Energy Dissipation
- Replies:
**2** - Views:
**904**

### Energy Dissipation

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.

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

I appreciate your help.

- Sat May 09, 2020 8:49 am
- Forum: OpenSees.exe Users
- Topic: How to model the transverse reinforcement?
- Replies:
**1** - Views:
**639**

### How to model the transverse reinforcement?

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.

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

I appreciate your help.

- Tue Apr 21, 2020 3:02 am
- Forum: OpenSees.exe Users
- Topic: Force-based Frame Element ?!
- Replies:
**1** - Views:
**580**

### Force-based Frame Element ?!

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...

- Sun Feb 23, 2020 1:51 am
- Forum: OpenSees.exe Users
- Topic: load Control !
- Replies:
**1** - Views:
**624**

### load Control !

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 ...

- Mon Oct 28, 2019 2:45 am
- Forum: OpenSees.exe Users
- Topic: What is the best choice to evaluate the effect of shear ?
- Replies:
**0** - Views:
**457**

### What is the best choice to evaluate the effect of shear ?

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...

- Sun Oct 13, 2019 12:29 am
- Forum: OpenSees.exe Users
- Topic: How to define shear spring for circular section?
- Replies:
**3** - Views:
**961**

### Re: How to define shear spring for circular section?

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.

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.

- Thu Oct 10, 2019 1:35 am
- Forum: OpenSees.exe Users
- Topic: How to define shear spring for circular section?
- Replies:
**3** - Views:
**961**

### How to define shear spring for circular section?

Dears colleagues, I'm working on shear failure about circular section column. Concerning the shear limit in OpenSees manual, i have something confused! In the input of curve, i should input the section b, h, but it's for rectangular section. What should i do to define b, h for circular section? I ap...

- Thu Oct 10, 2019 1:18 am
- Forum: OpenSees.exe Users
- Topic: shear limit curve
- Replies:
**3** - Views:
**1124**

### Re: shear limit curve

Dear colleague,

I confront the same problem. did you find a solution.

Cordially.

I confront the same problem. did you find a solution.

Cordially.