PREDICTION OF AXIAL SHORTENING
PREDICTION OF AXIAL SHORTENING
PREDICTION OF AXIAL SHORTENING
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<strong>PREDICTION</strong> METHODOLOGY<br />
1 - ANALYSIS PARAMETERS<br />
RH<br />
<strong>SHORTENING</strong> CALCULATIONS TO THE REQUIREMENTS <strong>OF</strong> "EUROCODE 2, BS EN 1992-1-1:2004<br />
Relative Humidity % age<br />
H<br />
t 0<br />
c<br />
h o<br />
t<br />
t-t 0<br />
cc (t)<br />
A coefficient depending on the relative<br />
humidity & member size - for fcm => 35<br />
Age of concrete at loading<br />
Compressive stress applied at age t o<br />
Section notional size = 2 Area / Perimeter<br />
Age of concrete at the moment)<br />
Non-adjusted duration of loading<br />
Cefficient for the calculation of<br />
compressive strength f cm (t) at age t<br />
1.5[1+(.012 RH) 18 ] h o + 250 3 ,
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