التفاصيل البيبلوغرافية
| العنوان: |
Theoretical analysis and design of fire protection and thermal insulation of parallel wire or strand cables |
| المؤلفون: |
Ouyang, Ping, Chen, Boxuan, Shen, Quanxi, Zhu, Wanxu |
| المساهمون: |
national natural science foundation of china, Key R&D Projects in the Guangxi Autonomous Region, Major Construction Program of the Science and Technological Innovation Base in the Guangxi Autonomous Region |
| المصدر: |
Advances in Mechanical Engineering ; volume 14, issue 10, page 168781322211278 ; ISSN 1687-8132 1687-8140 |
| بيانات النشر: |
SAGE Publications |
| سنة النشر: |
2022 |
| مصطلحات موضوعية: |
Mechanical Engineering |
| الوصف: |
In this study, a transient heat flow model has been established for parallel wire or strand cables at high temperature by employing the lumped thermal mass approach, and the numerical solution of the surface temperature as a function of time in each layer of the steel wire or strand inside the cable was calculated. Accuracy of the theoretical method is verified through uniform heating test of 73Φ15.7 mm steel strand cable. The results calculated show that temperature field inhomogeneity of cable section is overestimation on the condition that heat conduction inside the cable is not considered. Considering heat conduction or not, the maximum temperature difference of the core steel stand at the same time point is 373 . Unprotected 73Φ15.7 mm cable is damaged in only 12 min in UL1709 fire, and arrangement of fire protection layer around cable can effectively retard the temperature rise of cable surface. The experimental results are in good agreement with the theoretical calculation values in early stage of fire, and the temperature difference between the two is within 10%. Besides, the numerical calculations were analyzed in accordance with the fire protection requirements limiting the surface temperature of cables. It was observed that the minimum thickness of the fire protection layer required to meet the PTI DC45.1-12 standard was linearly related to the numerical value of the section factor of the outermost layer of steel wires or steel strands in the equivalent model, and the slope of the function was approximately equal to the conduction coefficient of fire protection layer, as the cable was subjected to fire for 30 min. Further, based on this, a simple method was proposed to calculate the minimum thickness of the fire protection layer for parallel wire or strand cables. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
English |
| DOI: |
10.1177/16878132221127830 |
| الإتاحة: |
https://doi.org/10.1177/16878132221127830Test |
| حقوق: |
https://creativecommons.org/licenses/by/4.0Test/ |
| رقم الانضمام: |
edsbas.90610CEF |
| قاعدة البيانات: |
BASE |
