
Structural Analysis
6th Edition
ISBN: 9781337630931
Author: KASSIMALI, Aslam.
Publisher: Cengage,
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Transcribed Image Text:Two 150 mm x 300 mm concrete cylinders with randomly oriented steel
fiber contents of 0 and 2% by weight, respectively. After curing for 28 days,
the specimens were subjected to increments of compressive loads until fail-
ure. The load versus deformation results were as shown in Table P7.45.
TABLE P7.45
Specimen no.
2
Fiber content (%)
2
Deformation (mm)
Load (kN)
0.0305
507
507
0.0610
645 (failure)
681
0.0915
578
0.0915
396
1.525
338 (failure)
Assuming that the gauge length is the whole specimen height, determine the
following:
a. The compressive stresses and strains for each specimen at each load
increment.
b. Plot stresses versus strains for the two specimens on one graph.
c. The initial modulus of elasticity for each specimen.
d. The ultimate strength for each specimen.
e. The strain at failure for each specimen.
f. Toughness. Curves may be approximated with a series of straight lines.
g. Comment on the effect of adding fiber on the following:
i. Modulus of elasticity
ii. Ultimate strength
iii. Ductility
iv. Toughness
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