CIVIL NX Created March 24, 2025 09:47 Edited March 25, 2025 05:13

[CIVIL NX] Effect of Unstrained Length, Lu in Cable Forces

Question

How to calculate the cable tension forces corresponding to specified sag deformation?

Answer

During geometric non-linear analysis, the cable element is converted into an elastic catenary element and the unstrained length, Lu is considered.

Assume a 10 mm diameter cable of length 50 m split into elements of length, L = 0.5 m each. We will perform GNLA to obtain the cable pre-tension corresponding to a specified sag deformation of 5% of cable length. A sag deformation of 2.5 m corresponds to an unstrained element length, Lu = 0.5033 m. (Lu > L)

The calculations are available in the attached Excel document.

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[CIVIL NX] Understanding the SPC Feature in MIDAS CAD [CIVIL NX] Imported values of P-M in Civil NX from GSD does not match with P-M interaction curve of GSD [CIVIL NX] Column Section missing in the "Column Section Data for Design" Module [CIVIL NX] Effect of Unstrained Length, Lu in Cable Forces [CIVIL NX] LACK OF FIT FOR CONSTRUCTION STAGE ANALYSIS OF A CABLE-STAYED BRIDGE [CIVIL NX] Elastic Links Used with the Boundary Change Assignment [CIVIL NX] Rebar Defination [CIVIL NX] Section For Resultant Force [CIVIL NX] Difference between Elastic links with and without shear spring location. [CIVIL NX] Soil Pressure Check