Research Article

Failure Mechanism and Mechanical Properties of a Retard-Bonded Prestressed Concrete Girder While Curing

Table 3

Crack development status.

Vertical load (kN)The main crack width of PC 1-0-0 in a pure bending section of the test specimen (mm)Vertical load (kN)The main crack width of PC 2-0-6 in a pure bending section of the test specimen (mm)
12341234

227Crack
245Crack2500.080.050.06
2750.060.070.070.082750.090.070.110.19
3000.070.070.070.103000.200.170.230.31
3250.070.090.100.123250.200.160.190.25
3600.080.150.160.283600.210.170.400.26
3750.150.210.170863750.250.230.530.53
4000.150.210.170.864000.470.920.57
4200.600.330.641.214250.611.211.01
506Damage557Damage
Average distance between cracks (mm)256Average distance between cracks (mm)240

Vertical load (kN)The main crack width of PC 3-0-8 in a pure bending section of the specimen (mm)Vertical load (kN)The main crack width of PC 4-0-0 in a pure bending section of the test specimen (mm)
123412345

240Crack250Crack
2700.080.080.090.092700.110.060.050.04
2900.130.140.090.092900.200.060.070.050.15
3100.180.190.100.133300.220.090.130.090.16
3300.170.190.100.173500.290.050.110.170.17
3500.170.190.100.193750.320.110.110.190.15
3650.170.190.090.234000.370.180.140.250.19
3900.130.200.110.234250.390.200.180.320.25
597Crack609Crack
Average distance between cracks (mm)233Average distance between cracks (mm)230

Vertical load (kN)The main crack width of PC 5-6-8 in a pure bending section of the test specimen (mm)Vertical load (kN)The main crack width of PC 6-8-8 in a pure bending section of the test specimen (mm)
12341234

230Crack225Crack
2650.120.060.120.062650.140.110.120.17
2900.200.070.170.112900.170.150.130.23
3150.250.040.180.153150.180.190.250.25
3400.250.050.110.173400.200.160.400.35
3650.290.040.200.213650.530.280.571.01
3900.440.040.520.183900.710.410.611.04
4150.800.050.700.584150.930.530.751.07
536Crack527Crack
Average distance between cracks (mm)266Average distance between cracks (mm)250