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a[mm]/l - Memorial University of Newfoundland DAI
a[mm]/l - Memorial University of Newfoundland DAI
a[mm]/l - Memorial University of Newfoundland DAI
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ocks. Mnlvem. et nl. (1985) reponed lhar recent expnmental results for concrete have<br />
not fully confirmed lhls prsdlcrlon<br />
A<strong>mm</strong>aon and Nusrbvumsr (1995) dcsenbed that the compressrve nrcnglh <strong>of</strong><br />
concrete can be wntlen m lcrmr <strong>of</strong> stram mle as<br />
where. E = %ran raa<br />
6, = rrraan rate at qunrl stauc condtuon<br />
f, = rtatlc cube rtrenah <strong>of</strong> concrete<br />
Thlr relalonrhnp reveals that the lnfluenee <strong>of</strong> loadmg raw decreases as the grade <strong>of</strong><br />
concrete tncreasss. If ,he influence <strong>of</strong> the load~ng ma on !he modulus were no,<br />
considered, the power <strong>of</strong> the equauan above would be I0 o where a IS the dynnmlc<br />
mrrenal pmpny as defined m Eqvatron (2.1 11.<br />
253.2. Modulus <strong>of</strong> ElasliEity<br />
The modulus <strong>of</strong> elasrrc8ty IYoung'r modulus1 <strong>of</strong> the concrete tn eomprerslon lncresrer<br />
wnth stress and srran me. The relatlon between rrauc and dynamlc (Impact) modulus <strong>of</strong><br />
slvrl~c~ry Ir given by A<strong>mm</strong>nnn and Nusrbaumer r 19951 ~n the follawlng equason.<br />
0.025<br />
with E. = 30.10-~ r-I<br />
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