The program seems to be considering elastic shortening stresses when a tendon modeled as elements is first stressed. How can I disregard these elastic shortening losses?
In the current version of the program (V14.0.0 as of June 2009), the elastic shortening losses are always considered when tendon load is applied to tendons modeled as elements. This approach is directly to applicable to pre-tensioned construction. However, for post-tensioned construction, the elastic shortening losses are compensated for by further stressing the tendons to the desired tension. There are two approaches to handle this in SAP2000: (1) Use the following iterative approach to disregard shortening losses when the tendon is first stressed: • Use “Assign > Tendon Loads > Tendon Force/Stress” menu command to specify the desired tendon jacking forces. • Run the analysis and check the tendon forces. • Adjust the tendon jacking forces for compensate for the elastic shortening; run analysis and check the resulting tendon forces. • Iterate, until the desired tendon forces are obtained. (2) Use tendon target force to disregard shortening losses when the tendon is first stressed. Howe
