Numerical Analysis of Ultimate Mechanical Characteristics of Suspension Bridges’s Cable in High Temperature Fire

Jiarun Song; Xuehong Li; Weiqing Liu

doi:doi:10.11648/j.sd.20210903.17

| Peer-Reviewed

Numerical Analysis of Ultimate Mechanical Characteristics of Suspension Bridges’s Cable in High Temperature Fire

Jiarun Song, Xuehong Li, Weiqing Liu

Published in Science Discovery (Volume 9, Issue 3)

Received: 19 April 2021 Accepted: Published: 24 May 2021

Views: Downloads:

Download PDF

Share This Article

Twitter
Linked In
Facebook

Abstract

Relying on the joint research project, research is carried out on the ultimate mechanical characteristics of suspension bridge slings under high temperature fire. The establishment of a local transient temperature field heat transfer model based on the FDS software, and the analysis of the temperature distribution law of the fire source at different wind speeds. The most unfavorable fire condition is the combination of the fire source heat release rate of 300MW and the wind speed of 14m/s; the overall structure model of the bridge is modeled by ANSYS software. Firstly, the modal analysis of the whole bridge model is carried out to verify the accuracy of the modeling, and then the thermal structural coupling analysis is carried out under the most unfavorable fire conditions to obtain the structural response of the whole bridge structure under the sling fire. According to the change trend of the structure response of the cable under fire, the fire resistance limit of the bridge structure is obtained as 460°C; Under the most unfavorable fire burning situation, when the limit number of broken cable in the span is 3, the cable will be caused into collapsing continuously; the composite protective layer has a significant effect on the fire resistance of the cable.

Published in	Science Discovery (Volume 9, Issue 3)
DOI	10.11648/j.sd.20210903.17
Page(s)	121-127
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2021. Published by Science Publishing Group

Keywords

Suspension Bridge Fire, Wind Speed Temperature Field, Cable Broke Continuously at High Temperature

References

[1]	张岗，贺栓海，宋超杰，黄侨，KODUR V K,张永飞.钢结构桥梁抗火研究综述[J].中国公路学报，2021，34(01):1-11.
[2]	李艳，汪剑，周国华.大跨径悬索桥缆索体系抗火设计研究[J].公路，2018，63(05):94-101.
[3]	杨光武，徐宏光，张强.马鞍山长江大桥三塔悬索桥关键技术研究[J].桥梁建设，2010(5):7-11。
[4]	丛北华，廖光煌，韦亚星.计算机模拟在火灾科学与工程研究中的应用[J].防灾减灾工程学报，2003，23(2):63-69。
[5]	田伟.武汉鹦鹉洲长江大桥汽车燃烧下高温力学性能与风险防范措施研究[D].武汉：武汉理工大学土木工程与建筑学院，2014:87-98。
[6]	袁旭东，船舶油气爆燃加强机制研究[D].哈尔滨工业大学，2017:8-63。
[7]	刘世忠，马朝旭，李丽园，刘欣益等.火灾下PC箱梁的损伤评估与加固设计[J].桥梁建设，2014，44(6):94-100。
[8]	陈玲珠，蒋首超，李国强.不同规范组合梁抗火设计方法的比较和分析[J].防灾减灾工程学报，2015，35(1):69-78。
[9]	KODUR V，AZIZ E，DWAIKAT M.Evaluating fire resistance of steel girders in bridges[J].Journal of Bridge Engineering，2013，18(7):633-643。
[10]	熊伟，李耀庄，严加宝.火灾作用下钢筋混凝土梁温度场数值模拟及试验验证[J].中南大学学报(自然科学版)，2012，43(7):2839-2843。
[11]	LIU Fentao，WU Bo，WEI Demin.Failure modes of reinforced concrete beams strengthened with carbon fiber sheet in fire[J]. Fire Safety Journal，2009，44(7):941-950。
[12]	吕学涛，杨华，张素梅.三面受火的方钢管混凝土柱耐火极限[J].自然灾害学报，2012，21(3):198-203。
[13]	王莹等.大跨经悬索桥缆索抗火模拟方法[J].中南大学学报(自然科学版)，2012，47(6)2091-2099。
[14]	姬芬芬.FPSO的火灾风险评估[D].宁波:宁波大学，2017:26-35。
[15]	田伟.武汉鹦鹉洲长江大桥汽车燃烧下高温力学性能与风险防范措施研究[D].武汉:武汉理工大学，2014:61-62。

Cite This Article

Plain Text BibTeX RIS

APA Style

Jiarun Song, Xuehong Li, Weiqing Liu. (2021). Numerical Analysis of Ultimate Mechanical Characteristics of Suspension Bridges’s Cable in High Temperature Fire. Science Discovery, 9(3), 121-127. https://doi.org/10.11648/j.sd.20210903.17

Copy | Download

ACS Style

Jiarun Song; Xuehong Li; Weiqing Liu. Numerical Analysis of Ultimate Mechanical Characteristics of Suspension Bridges’s Cable in High Temperature Fire. Sci. Discov. 2021, 9(3), 121-127. doi: 10.11648/j.sd.20210903.17

Copy | Download

AMA Style

Jiarun Song, Xuehong Li, Weiqing Liu. Numerical Analysis of Ultimate Mechanical Characteristics of Suspension Bridges’s Cable in High Temperature Fire. Sci Discov. 2021;9(3):121-127. doi: 10.11648/j.sd.20210903.17

Copy | Download

@article{10.11648/j.sd.20210903.17,
  author = {Jiarun Song and Xuehong Li and Weiqing Liu},
  title = {Numerical Analysis of Ultimate Mechanical Characteristics of Suspension Bridges’s Cable in High Temperature Fire},
  journal = {Science Discovery},
  volume = {9},
  number = {3},
  pages = {121-127},
  doi = {10.11648/j.sd.20210903.17},
  url = {https://doi.org/10.11648/j.sd.20210903.17},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sd.20210903.17},
  abstract = {Relying on the joint research project, research is carried out on the ultimate mechanical characteristics of suspension bridge slings under high temperature fire. The establishment of a local transient temperature field heat transfer model based on the FDS software, and the analysis of the temperature distribution law of the fire source at different wind speeds. The most unfavorable fire condition is the combination of the fire source heat release rate of 300MW and the wind speed of 14m/s; the overall structure model of the bridge is modeled by ANSYS software. Firstly, the modal analysis of the whole bridge model is carried out to verify the accuracy of the modeling, and then the thermal structural coupling analysis is carried out under the most unfavorable fire conditions to obtain the structural response of the whole bridge structure under the sling fire. According to the change trend of the structure response of the cable under fire, the fire resistance limit of the bridge structure is obtained as 460°C; Under the most unfavorable fire burning situation, when the limit number of broken cable in the span is 3, the cable will be caused into collapsing continuously; the composite protective layer has a significant effect on the fire resistance of the cable.},
 year = {2021}
}

Copy | Download

TY  - JOUR
T1  - Numerical Analysis of Ultimate Mechanical Characteristics of Suspension Bridges’s Cable in High Temperature Fire
AU  - Jiarun Song
AU  - Xuehong Li
AU  - Weiqing Liu
Y1  - 2021/05/24
PY  - 2021
N1  - https://doi.org/10.11648/j.sd.20210903.17
DO  - 10.11648/j.sd.20210903.17
T2  - Science Discovery
JF  - Science Discovery
JO  - Science Discovery
SP  - 121
EP  - 127
PB  - Science Publishing Group
SN  - 2331-0650
UR  - https://doi.org/10.11648/j.sd.20210903.17
AB  - Relying on the joint research project, research is carried out on the ultimate mechanical characteristics of suspension bridge slings under high temperature fire. The establishment of a local transient temperature field heat transfer model based on the FDS software, and the analysis of the temperature distribution law of the fire source at different wind speeds. The most unfavorable fire condition is the combination of the fire source heat release rate of 300MW and the wind speed of 14m/s; the overall structure model of the bridge is modeled by ANSYS software. Firstly, the modal analysis of the whole bridge model is carried out to verify the accuracy of the modeling, and then the thermal structural coupling analysis is carried out under the most unfavorable fire conditions to obtain the structural response of the whole bridge structure under the sling fire. According to the change trend of the structure response of the cable under fire, the fire resistance limit of the bridge structure is obtained as 460°C; Under the most unfavorable fire burning situation, when the limit number of broken cable in the span is 3, the cable will be caused into collapsing continuously; the composite protective layer has a significant effect on the fire resistance of the cable.
VL  - 9
IS  - 3
ER  -

Copy | Download

Author Information

Jiarun Song

Civil Engineering Department, Nanjing Tech University, Nanjing, China
Xuehong Li

Civil Engineering Department, Nanjing Tech University, Nanjing, China
Weiqing Liu

Civil Engineering Department, Nanjing Tech University, Nanjing, China

Download PDF

Sections

Plain Text BibTeX RIS

APA Style

Jiarun Song, Xuehong Li, Weiqing Liu. (2021). Numerical Analysis of Ultimate Mechanical Characteristics of Suspension Bridges’s Cable in High Temperature Fire. Science Discovery, 9(3), 121-127. https://doi.org/10.11648/j.sd.20210903.17

Copy | Download

ACS Style

Jiarun Song; Xuehong Li; Weiqing Liu. Numerical Analysis of Ultimate Mechanical Characteristics of Suspension Bridges’s Cable in High Temperature Fire. Sci. Discov. 2021, 9(3), 121-127. doi: 10.11648/j.sd.20210903.17

Copy | Download

AMA Style

Jiarun Song, Xuehong Li, Weiqing Liu. Numerical Analysis of Ultimate Mechanical Characteristics of Suspension Bridges’s Cable in High Temperature Fire. Sci Discov. 2021;9(3):121-127. doi: 10.11648/j.sd.20210903.17

Copy | Download

@article{10.11648/j.sd.20210903.17,
  author = {Jiarun Song and Xuehong Li and Weiqing Liu},
  title = {Numerical Analysis of Ultimate Mechanical Characteristics of Suspension Bridges’s Cable in High Temperature Fire},
  journal = {Science Discovery},
  volume = {9},
  number = {3},
  pages = {121-127},
  doi = {10.11648/j.sd.20210903.17},
  url = {https://doi.org/10.11648/j.sd.20210903.17},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sd.20210903.17},
  abstract = {Relying on the joint research project, research is carried out on the ultimate mechanical characteristics of suspension bridge slings under high temperature fire. The establishment of a local transient temperature field heat transfer model based on the FDS software, and the analysis of the temperature distribution law of the fire source at different wind speeds. The most unfavorable fire condition is the combination of the fire source heat release rate of 300MW and the wind speed of 14m/s; the overall structure model of the bridge is modeled by ANSYS software. Firstly, the modal analysis of the whole bridge model is carried out to verify the accuracy of the modeling, and then the thermal structural coupling analysis is carried out under the most unfavorable fire conditions to obtain the structural response of the whole bridge structure under the sling fire. According to the change trend of the structure response of the cable under fire, the fire resistance limit of the bridge structure is obtained as 460°C; Under the most unfavorable fire burning situation, when the limit number of broken cable in the span is 3, the cable will be caused into collapsing continuously; the composite protective layer has a significant effect on the fire resistance of the cable.},
 year = {2021}
}

Copy | Download

TY  - JOUR
T1  - Numerical Analysis of Ultimate Mechanical Characteristics of Suspension Bridges’s Cable in High Temperature Fire
AU  - Jiarun Song
AU  - Xuehong Li
AU  - Weiqing Liu
Y1  - 2021/05/24
PY  - 2021
N1  - https://doi.org/10.11648/j.sd.20210903.17
DO  - 10.11648/j.sd.20210903.17
T2  - Science Discovery
JF  - Science Discovery
JO  - Science Discovery
SP  - 121
EP  - 127
PB  - Science Publishing Group
SN  - 2331-0650
UR  - https://doi.org/10.11648/j.sd.20210903.17
AB  - Relying on the joint research project, research is carried out on the ultimate mechanical characteristics of suspension bridge slings under high temperature fire. The establishment of a local transient temperature field heat transfer model based on the FDS software, and the analysis of the temperature distribution law of the fire source at different wind speeds. The most unfavorable fire condition is the combination of the fire source heat release rate of 300MW and the wind speed of 14m/s; the overall structure model of the bridge is modeled by ANSYS software. Firstly, the modal analysis of the whole bridge model is carried out to verify the accuracy of the modeling, and then the thermal structural coupling analysis is carried out under the most unfavorable fire conditions to obtain the structural response of the whole bridge structure under the sling fire. According to the change trend of the structure response of the cable under fire, the fire resistance limit of the bridge structure is obtained as 460°C; Under the most unfavorable fire burning situation, when the limit number of broken cable in the span is 3, the cable will be caused into collapsing continuously; the composite protective layer has a significant effect on the fire resistance of the cable.
VL  - 9
IS  - 3
ER  -

Copy | Download