Effect of New Prestress Loss Estimates on Pretensioned Concrete ...

prestress loss calculated for a typical pretensioned girder is shown in Figure 2. ... deviation angle is strictly controlled or precisely known, as in the case of ...







Field Measurement and Evaluation of Time-Dependent Losses in ...
The equations for this is as follows: ?fpR2 = 20.0 - 0.4?fpFS - 0.2(?fpSR + ?fpCR). (3.12). ?fPR2 =20.0 - 0.3?fpF - 0.4?fpES - 0.2(?fpSR + ?fpCR).
EVALUATING PRESTRESS LOSSES DURING PRE-TENSIONING
Equation [3] can be used to predict the loss, (TL ? TD)/ TL, for different deviation angles ?. For a 12.7-mm. (0.5-inch) diameter Grade 270 strand, A=108mm2 ...
CHAPTER 5.2 POST-TENSIONED CONCRETE GIRDERS - Caltrans
? = sum of the absolute values of angular change of prestressing steel path ... A summary of our calculated immediate and total prestress stress remaining ...
april 2000 section 9 - prestressed concrete - Discount PDH
The amount of tie back reinforcement may be reduced using Equation (9-32), if permanent compressive stresses are generated behind the anchor from other loads.
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