Skip to main content

Table 6 Comparison of test results with predictions by design code.

From: Axial Load Testing of Hybrid Concrete Columns Consisting of UHPFRC Tube and Normal-Strength Concrete Core

Specimen

Test resultsa

Predictions by design codeb

Non-composite (NSC core only)

Full-composite (UHPFRC Tube + NSC core)

k i (kN/mm)

P p (kN)

k e (kN/mm)

P o (kN)

k e (kN/mm)

P o (kN)

HCC1 (control)

3466

3369

2610

2926

3262

4930

HCC2 (V f  = 2.0%)

3776

3729

2610

2926

3534

6241

HCC3 (s = 200 mm)

3318

3440

2610

2926

3262

4930

HCC4 (V f  = 2.0%, s = 200 mm)

3689

3624

2610

2926

3534

6241

HCC5 (no wire-mesh)

3476

3370

2610

2926

3262

4930

  1. aFor test results, initial stiffness k i  = P/δ was defined at 0.45P p .
  2. bFor predictions by design code, elastic stiffness k e and axial strength P o were determined by Eqs. (1a) and (2a) using converted cylinder strength.