Question on cable

[szleok]

Hi, all

I have question on the cable force. I first applied a negative temperature on the cables to produce post -tension stress in cable. The cable is along a simple supported beam. They have same property. Once the model runned, the cable force will change to different values. The one close to mid span reduced most force. I guess it is because the mid span has biggest deflection so the cable will sag most in that area. But since this is a static analysis, how SAP determine the stress after the cable length shortened? ANybody know how SAP determine the force in cable suring static analysis?

Thanx to all replies

 

[stressed]

I'm not sure what version of SAP you're working with, but as of version 9 you can define post tension stress using loads and/or an actual cable tendon element. I am a bit confused as to why you defined your cable element using the same section property as your simply supported beam.