1 Introduction
2 Knowledge Gap and Scope of this Paper
3 Thermomechanical Response of a Heterogeneous Cable
3.1 Thermal Response
3.1.1 Conductive Heat Transfer Across the Contact Surface of Strands
3.1.2 Heat Transfer Across Interstitial Air Cavities
3.1.3 Total Thermal Resistance Between Strands
3.1.4 Heat Transfer Between the External Insulation and the Strands
3.2 Plane Strain Mechanical Response
3.3 Thermal and Mechanical Material Properties
3.4 Validation of the Thermal Response and Input Sensitivity
4 Design Fire Scenarios
Uniform | Unprotected heterogeneous | Protected heterogeneous | |
---|---|---|---|
Net section diameter (mm) | 99.00 | 111.00 | 141.00 |
Strand diameter (mm) | n/a | 15.71 | 15.71 |
Horizontal spacing† (mm) | n/a | 15.71 | 15.71 |
Vertical spacing† (mm) | n/a | 13.65 | 13.65 |
Protection thickness (mm) | n/a | n/a | 15.00 |
Spacing between insulation and strands (mm) | n/a | n/a | 0.52 |