The OpenSees Community

Does anyone know why I cannot access to some part of the website such as links below ?

http://opensees.berkeley.edu/OpenSees/workshops
http://opensees.berkeley.edu/WebSVN/lis ... runk%2FSRC

Thanks

selimgunay wrote: > Which mass are you using? Hello selimgunay, Let's consider SDOF. The Resistance force in my damper is F = B.a which B is the fraction of mass of the structure, let say B = 0.5 m. Therefore the resistance force is F = B.a = 0.5.m.a. a is relative acceleration between two nodes of ...

Hello, I am trying to model a new type of damper which its resistance force is proportional to relative acceleration of its nodes and I got stuck. The concept is super easy, let me give you an example. In Viscous damper resistance force is proportional to velocity, let say F=C.V. In my damper resist...

Hey fmk, Do you have any tip how I can start coding that ?
I wonder if I could use the source code of ViscousDamper Material and modify that in the way I get resistance force based on accelerations in each step instead of velocities. Am I in a right tack ?

Thanks.

Hey TPdct , Yes please.

I cannot access the aforementioned page. I constantly get the error below:

Forbidden
You don't have permission to access /WebSVN/listing.php on this server.

Apache/2 Server at opensees.berkeley.edu Port 80

Any Idea why I receive this error ? I am using Mac

Does anyone know how I can access the source code in OpenSees ?
I'd like to access the source code for the viscous damper material and modify that based on my research.
Than you in advance

Hello everyone Does anyone know what element I should use in order to have the force of element proportional to relative accelerations between its two terminals ? For example, the force of viscous damper is proportional to relative velocity between its two terminal or in friction damper the force of...

Hello, In order to model new type of dampers I need an element which works with relative acceleration between two nodes. As far as I know, the built-in functions in OpenSees usually work with displacements and velocities at each step but I need a function which works with acceleration. Do you have a...