Prestress

[cosy99]

Hi..
I am trying to model prstressed concrete beams (Pre-tensioned beam). I uses (*initial condition) commend for the initial stress of the bar(tendon), but for that case the strain of the bar still zero even though there is stress.
I am just wondering which way is the best for the prestressed concrete beams. Thanks.

Best regards,
Han Tae Choi

 

[mrgoldthorpe]

Don't forgor there is also a balancing compression in the concrete, as well in tension in the bars.

 

[cosy99]

Thank you for answer.
Then, for the calculation of the real strain of the bars, should the initial strain (fs/Es) due to prestressing be added to the resultant strain?

Han