Advances in Civil Engineering / 2018 / Article / Tab 4

Research Article

EM-Based Monitoring and Probabilistic Analysis of Prestress Loss of Bonded Tendons in PSC Beams

Table 4

Statistical properties of random variables.

Random variablesUnitMeanCOVDistributionSources

Uncertainty factor for creep model, 10.339Normal[18]
Uncertainty factor for shrinkage model, 10.451Normal[18]
Concrete strength, MPa63.90.089Normal[25]
Density of concrete, kN/m325.50.046Normal[26]
Initial stress in steel, MPa723 (PC1)0.020Normal[27]
977 (PC4)
Annual relative humidity, %75.00.161NormalObserved
Initial loading age, d300.110UniformAssumed
Elastic modulus of prestressing steel, MPa1.95 × 1050.060Normal[28]
Area of nonprestressed steel, mm2565.50.035Normal[29]
Area of prestressed steel, mm21400.0125Normal[30]

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