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International Journal of Concrete Structures and Materials

Table 1 Specimen details (unit: mm).

From: Flexural Behavior of Post-tensioned Lightweight Concrete Continuous One-Way Slabs

Group

Specimen

Load Type

b

h

L (one span)

L/d p

PPR

ρ s

ρ p

f pe /f pu

e

1

S-L/d p -25

Uniform

600

125

2400

25

0.792

0.00247

0.00206

0.6

33.1

S-L/d p -35

3400

35

S-L/d p -45

4300

45

2

S-PPR-0.5

0.884

0.00123

33.2

S-PPR-1.0

0.792

0.00247

33.1

S-PPR-1.5

0.718

0.00370

32.9

  1. b member width, h member height, e eccentricity of prestressing strands, ρ s ratio of steel, ρ p ratio of tendon, d p effective depth of prestressing strands.
  2. PPR (partial prestressing ratio) = A p f pe /(A p f pe  + A s f y ), where f pe effective prestress, A p sectional area of prestressing steel, f y yield stress of steel, A s sectional area of steel.
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