Product(s):	SACS
Version(s):	All
Area:	Fatigue

Problem

How can I define number of Rings in CONRST line for fatigue check?

Solution

The rings layout is defined by the ring spacing on the RING line and the ring location on the CONRST line. The number of rings is determined by the brace geometry (note that the documentation states the spacing is dependent on the distance from the ring to the saddle), so however many rings might fit within the projected distance between saddles of the brace chord intersection.

Example 1 - The ring spacing is defined as 30 cm and column 27-33 is blank as below:

In this case, the brace is 91cm and the chord and brace intersect at a 90-degree angle so the projected distance would just be 91cm. When 0 cm ring location is entered with a 30 cm spacing three rings are applied like below:

More rings cannot be added because they exceed the footprint of the brace intersection (120cm). You will get to see the number of rings in the listing file:

Example 2 - The ring spacing is defined as 30 cm and ring location input as 20cm as below:

An additional ring is applied because the initial ring location is such that two additional rings barely fit within the footprint of the brace.

The number of rings depends on the ring spacing and ring location defined.

Defining Ring with CONRST line

Problem

Solution

See Also