|
|
|
| Fire Resistance and Design of Composite Box Girder with Corrugated Steel Webs and Steel Bottom Plate |
| CHENG Haigen1, SHEN Qiang2, ZHENG Shangmin1, GUAN Chong1 |
1. East China Jiaotong University, Nanchang , Jiangxi 330013, China;
2. Chongqing University, Chongqing 400044, China |
|
|
|
Abstract Research purposes: In recent years, the increase in traffic volume has raised concerns about bridge fires resulting from vehicle collisions or the transportation of flammable materials. To understand the fire response of composite box girder with corrugated steel webs and steel bottom plate, a three-dimensional thermal-mechanical coupling analysis model was developed using ANSYS. This model analyzed the temperature field distribution and the decay of flexural bearing capacity under fire conditions. Additionally, it examined the impact of various fire scenarios on the fire resistance limit of the composite box girder and proposed fire-resistant design methods.
Research conclusions: (1) The flexural bearing capacity of composite box girders under fire conditions progresses through three stages. The mid-span deflection, across various fire lengths, develops in two stages over time. As the fire length increases, the deflection growth rate of the composite box girder becomes more significant, with a more pronounced thermal bending effect during the initial fire stage. (2) Using the deflection failure criterion to determine the fire resistance limit of composite box girders is safer than using the resistance criterion. (3) Adding various types of stiffeners to the bottom plate of composite box girders improves their fire resistance limit. With the same amount of stiffener material, local stiffeners on the bottom plate enhance the fire resistance limit more effectively than continuous stiffeners. (4) The research findings can provide a reference for the theoretical analysis and fire-resistant design of composite box girder with corrugated steel webs and steel bottom plate.
|
|
Received: 25 August 2023
|
|
|
|
|
|
| [1] |
NIE J G, ZHU Y J, TAO M X, etc. Optimized Prestressed Continuous Composite Girder Bridges with Corrugated Steel Webs[J]. Journal of Bridge Engineering, 2017(2): 04016121.
|
| [2] |
AZIZ E M, KODUR V K, GLASSMAN J D, etc. Behavior of Steel Bridge Girders under Fire Conditions[J]. Journal of Constructional Steel Research, 2015, 106:11-22.
|
| [3] |
Zhang G, Kodur V K, Song C J, etc. A Numerical Model for Evaluating Fire Performance of Composite Box Bridge Girders - ScienceDirect[J]. Journal of Constructional Steel Research, 2020(2): 1-10.
|
| [4] |
Huanting Z, Zhengzheng W, M.Z. N, etc. Large Scale Fire Resistance Tests of Prestressed Continuous Steel-Concrete Composite Beams to Evaluate the Effects of Geometric Imperfections[J]. Thin-Walled Structures,2023,186.
|
| [5] |
BSEN1994-1-2,Eurocode 4-Design of Composite Steel and Concrete Structures-Part 1-2: General Rules- Structural Fire Design[S].
|
| [6] |
姚伟发, 黄侨, 张娟秀. 火灾环境下钢-混凝土组合梁力学性能试验研究[J]. 工程力学, 2016(8): 58-65.Yao Weifa, Huang Qiao, Zhang Juanxiu.Experimental Study on Mechanical Performance of Steel-Concrete Girders under Fire Loading[J]. Engineering Mechanics, 2016(8): 58-65.
|
| [7] |
周旺保, 许添鑫, 谭志化, 等. 波形钢腹板钢-混凝土简支组合箱梁抗弯承载力分析[J]. 铁道科学与工程学报, 2021(8): 2089-2096.Zhou Wangbao, Xu Tianxin, Tan Zhihua, etc. Analysis of the Flexural Bearing Capacity of Simply Supported Steel-concrete Composite Box Girders with Corrugated Steel Webs[J]. Journal of Railway Science and Engineering, 2021(8): 2089-2096.
|
| [8] |
李国强, 韩林海, 楼国彪, 等. 钢结构及钢-混凝土组合结构抗火设计[M]. 北京:中国建筑工业出版社,2006.Li Guoqiang, Han Linhai, Lou Guobiao, etc. Fire
|
|
|
|
2024, Vol. 41 
