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Modeling of post-tensioned slab with bonded tendons

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krishna
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Hi , I am modeling a post-tensioned slab with bonded tendons. I used parabolic prestressing tendons (with circular cross-section for simplicity) in the model where the contact between prestressing steel and the surrounding grout is frictional contact. But there is a shortcoming that if the tendons are straight instead of parabolic, there will be no pressure and no friction at all. Have you guys modeled slabs with bonded tendons with other methods?

Regards,

Leo

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