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This page is devoted to frequently asked questions (FAQ) related to tendons. |
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Tendon types
What is the difference between prestressed and post-tensioned tendons, and are both available to SAP2000?
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Post-tensioned tendons may be directly modeled within SAP2000, while prestressed tendons may be modeled using techniques described in the Modeling different types of tendons article.
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The option for Prestress Type Tendon on the Section Data form is currently inactive, but intended for application in future versions. |
Modeling
How does SAP2000 handle tendons which are modeled as objects?
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Answer: Yes, tendons may span gaps when the tendons are modeled as elements, and not when modeled as loads. The Modeling segmental-bridge joint openings tutorial presents an example bridge application.
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Formulation
What equation is used to apply curvature and wobble coefficients?
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Additional information is available in Context Help.
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Response
How do I find the elongation of post-tensioned tendons?
Answer: Tendon elongations may be derived through post-processing of axial force, tendon area, and Modulus of Elasticity.
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How may elastic-shortening losses be disregarded when tendons, modeled as objects, are first stressed?
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- Iterative approach. Disregard the elastic-shortening losses which occur when tendons are first stressed through the following process:
- Specify the desired tendon jacking forces through Assign > Tendon Loads > Tendon Force/Stress.
- Run analysis, check tendon forces, and adjust tendon jacking forces to compensate for elastic shortening.
- Repeat this last step until the desired tendon forces are obtained.
- Target force. Elastic-shortening losses may also be disregarded using tendon target force.
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However, please note that this application does not enable the inclusion of friction and anchorage loss. These sources of loss should be accounted for in the specification of target-force value. This answer is specific to SAP2000 V14.0.0 (June 2009). |
P-Delta effect
How are P-Delta effects handled when suspension-bridge prestressing forces are modeled using tendons?
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