## Search found 8 matches

Mon Dec 01, 2014 5:58 am
Forum: OpenSees.exe Users
Topic: Trying nonlinear methods with integrator LoadControl
Replies: 1
Views: 746

### Trying nonlinear methods with integrator LoadControl

How I can implement a code like this for the case of the integrator command is Integrator LoadControl ?. That is, If I use integrator LoadControl, is possible to change the algorithm through the integration process? I have some convergence problems and I would like to try several nonlinear methods. ...
Wed Nov 12, 2014 6:00 am
Forum: Reliability Analysis
Topic: Assign Random Variable to Reinforced Steel
Replies: 1
Views: 2055

### Re: Assign Random Variable to Reinforced Steel

Hello, all
I think that Steel02 material is not valid, as ii is implemented for structural reliability analysis.
Using uniaxialMaterial Hardening the error no objects were able to identify parameter
disappears, however convergence problems appear.

Thanks
Luis
Sun Nov 02, 2014 4:18 am
Forum: Reliability Analysis
Topic: Assign Random Variable to Reinforced Steel
Replies: 1
Views: 2055

### Assign Random Variable to Reinforced Steel

Hello, I have a question about assigning random variables to material properties of layer in a fiber section. How I can consider the material properties of the reinforced Steel bars in a RC section as random variables? I am working to compute structural reliability of a RC frame. I have defined RC s...
Mon May 19, 2014 4:20 am
Forum: Reliability Analysis
Replies: 4
Views: 4422

Hello, In my code I have used the command computeGradients This is a pierce of my code: computeGradients foreach p [lsort -integer [getParamTags]] { puts \$gradDESfile "[sensNodeDisp 2 2 \$p]" puts "[sensNodeDisp 2 2 \$p] " } My question is: Are the gradients obtained, normalized gradients or real grad...
Thu Mar 13, 2014 12:07 am
Forum: Reliability Analysis
Replies: 1
Views: 1955

Hello, I would like to know: Is there a function or command to compute the gradients of the reliability index (betaFORM) with relation to means of random variables? I have also some doubts about some functions starting with “get..” like getNodeTags getLSFTags getParamTags getRVTags Could you explain...
Sat Jan 25, 2014 2:07 am
Forum: Reliability Analysis
Topic: Reliability
Replies: 14
Views: 17232

### Re: Reliability

Hello, I have read the paper: "Shape sensitivities in the reliability analysis of nonlinear frame structures". In this paper two examples are explained. I thanks that Michael had uploaded the first example involving a steel structure. I have run it and it works very well. Can you please upload the s...
Fri Jan 03, 2014 4:16 pm
Forum: OpenSees.exe Users
Topic: Double T section in Steel
Replies: 0
Views: 508

### Double T section in Steel

Hi, I would like to computer and simulate a steel frame that consist in doule T sections. I will consider the width and height of column secctions and beam section as parameters or design variables in an optimization problem. I am modelling these beams and columns as nonlinearBeamColumn elements and...
Wed Aug 07, 2013 7:08 am
Forum: OpenSees.exe Users
Topic: DAKOTA - OPENSEES interface
Replies: 0
Views: 472

### DAKOTA - OPENSEES interface

Hi, Opensees Users. My name is Luis Celorrio, I came from La Rioja (Spain). I would like to know if someone has been working in Optimization Uncer Uncertainty using DAKOTA fron Sandia National Laboratory as an Optimization package and OpenSees as a Simulation Code. It is posible to connect these two...