Query on analysis and design of curved structures with cables.

[saruncivil]

Dear Engineers,

I’m looking for your help and guidance to do finish my job in perfect way and to shape my knowledge.
Please find the attached file and help me

Thanking you
Arun S

 

[BAretired]

1) If you are clear about steel design, then you should be able to solve the problem if the cable is replaced with a solid steel tie of the exact length between supports, unstressed when the structure is unloaded. The problem with the cable is no different except the properties of the cable may be a little difficult to pin down. You must know the Young's Modulus of the cable and the area of the cable in order to solve.

2) Initial tension and unstressed length of cable can be whatever you want to make them. If the unstressed length is greater than the distance between supports, the cable will not start to feel tension until the arch deflects outward and the cable becomes taut.

3) You could start with an assigned cable tension when the structure is unloaded or loaded with partial dead load. Then, as the structure becomes loaded, the cable tension will increase. The amount can be calculated if you know the properties of the arch structure and the cable.

4) Bearing type will depend on the type of foundation selected. If the arch is deemed to be hinged at each support, the cable will not be tensioned under live load, so the supports are presumably free to deflect outward. As the arch deflects, the cable is stressed.

BA

 

[saruncivil]

Thank u very much Mr.BAretired.
really your words are make me to think about the structure and cable behaviour.