What is Creep Primary & Creep Secondary?  How is the Creep Primary moment calculated?

Please note that the Creep Primary is not a real force that exists in the structure, but a fictitious force that simulates the creep deformation. The force that exists in the structure is Creep Secondary.

Let's consider a simple case.  If the current static load bending moment in the system is 250kN and if the long-term creep factor is say 1.7, then an equivalent bending moment of 1.7*250 = 425kNm would be acting to simulate the creep displacement.

You can find more information on the Primary and Secondary effects in the Online Manual:
Creation date: 11/26/2018 5:31 PM      Updated: 5/10/2023 7:04 PM
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