Method for calculating prestress loss caused by anchorage retraction
The invention discloses a method for calculating prestress loss caused by anchorage retraction. The method comprises the following steps: carrying out anchorage mouth friction test to obtain detected control stress under anchor P1, P2; calculating a first calculated value of the prestress loss cause...
Gespeichert in:
| Hauptverfasser: | , , , , , , , |
|---|---|
| Format: | Patent |
| Sprache: | chi ; eng |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Zusammenfassung: | The invention discloses a method for calculating prestress loss caused by anchorage retraction. The method comprises the following steps: carrying out anchorage mouth friction test to obtain detected control stress under anchor P1, P2; calculating a first calculated value of the prestress loss caused by anchorage retraction by utilizing a formula I, and calculating anchorage retraction amount by utilizing a formula II; and finally, calculating a second calculated value of the prestress loss caused by anchorage retraction by utilizing a formula III. Under the condition of giving anchorage device specifications, steel stranded bundle dimensions and a tensioning method, the invention provides a method for calculating prestress loss of steel stranded bundles in different lengths under the same anchorage retraction value; and through the method, prestress loss caused by anchorage retraction after a jack is unloaded can be evaluated and calculated more accurately, and a tensioning control force value practically ne |
|---|