Overview

Note: Some of the features described on this pages were implemented in V14 of the program.

This attached model contains the following four separate structures (please see the screenshot below):

• 1 span bridge structure created using bridge modeler

• 1 span bridge structure created using manual modeling

• 2 span bridge structure created using bridge modeler

• 2 span bridge structure created using manual modeling

All four structures have the following properties:

• each span length is 10m

• deck section is a concrete deck section 0.5m deep and 3m wide

• the structures are simply supported at each abutment and bent

• Straight 25mm dia tendon is defined to run along the entire length of the structures. The tendon is located 0.05m from the bottom of the section and a prestressing force of 10kN with no losses was applied to the tendon.

Goals of this model:

• Determine and review moments and other internal forces resulting from prestressing.

• Verify prestressing forces used for flexural design check.

• Compare prestressing forces obtained from "Display > Show Bridge Forces/Stresses" form with forces obtained from frame elements.

• Define section cut cutting through tendon and frame, get forces and compare them with forces obtained from frame and tendon elements at the same location.

Model Screenshots

See also

• [tp:Obtaining hyperstatic forces for bridge object superstructures]

Attachments

• [SAP2000 V12.0.2 model|Tendons - frame moments and section cuts^SAP2000 V12.0.2 model.zip] (Zipped SDB file)