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Table 4 Comparison of experimental and FE peak strains for test beams.

From: Behavior of FRP-Strengthened RC Beams with Large Rectangular Web Openings in Flexure Zones: Experimental and Numerical Study

Beam ID

Results

Strain in bottom rebars at mid-span (με)a

Strain in top rebars at mid-span (με)a

Strain in first FRP layer at mid-span (με)

Strain in second FRP layer at mid-depth of opening edge (με)

Mid-span steel plate strain at mid-depth of top chord (με)a

At mid-depth of bottom chord

At mid-depth of top chord

BC-N-4PB

EXP

NA

−  14,841

–

–

–

–

 

FE

69,540

−  14,036

–

–

–

–

 

EXP/FE

–

1.06

–

–

–

–

BC-O1-4PB

EXP

26,705

−  7683

–

–

–

–

 

FE

31,354

−  7797

–

–

–

–

 

EXP/FE

0.85

0.99

–

–

–

–

BC-N-CPL

EXP

NA

−  5407

–

–

–

–

 

FE

81,413

−  4980

–

–

–

–

 

EXP/FE

–

1.09

–

–

–

–

BC-O1-CPL

EXP

2609

434

–

–

–

–

 

FE

2583

460

–

–

–

–

 

EXP/FE

1.01

0.94

–

–

–

–

BS1-O1-CPL

EXP

2549

350

2526

858

1931

–

 

FE

2711

380

2771

691

2116

–

 

EXP/FE

0.94

0.92

0.91

1.24

0.91

–

BC-O2-CPL

EXP

NA

19,297

–

–

–

–

 

FE

1303

21,894

–

–

–

–

 

EXP/FE

–

0.88

–

–

–

–

BS2-O2-CPL

EXP

1990

8995

1366

–

762

2807

 

FE

2296

7768

1202

–

824

3033

 

EXP/FE

0.87

1.16

1.14

–

0.92

0.93

  1. Tensile strain is positive.
  2. EXP experimental, FE finite element, NA not available data.
  3. aValues in italic bold font indicate steel yielding.