Method for calculating prestress loss caused by anchorage retraction

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...

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Hauptverfasser: JIANG JIQING, CAI YUNLIANG, FAN HOUBIN, ZHOU LIANYING, DING ZHI, YU XINGFU, ZHANG RU, SUN MIAOMIAO
Format: Patent
Sprache:chi ; eng
Schlagworte:
MEASURING
MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE
PHYSICS
TESTING
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creator JIANG JIQING
CAI YUNLIANG
FAN HOUBIN
ZHOU LIANYING
DING ZHI
YU XINGFU
ZHANG RU
SUN MIAOMIAO
description 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
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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. 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subjects MEASURING
MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE
PHYSICS
TESTING
title Method for calculating prestress loss caused by anchorage retraction
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