Fire Performance of Continuous Steel-Concrete Composite Bridge Girders
Fire Performance of Continuous Steel-Concrete Composite Bridge Girders
复制标题
连续钢-混凝土组合桥梁梁的防火性能
DOI：
10.1007/s12205-021-0985-x
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发表时间：
2021-01
影响因子：
2.2
通讯作者：
Huang Qiao
中科院分区：
文献类型：
--
作者：
Zhang Gang;Song Chaojie;Li Xuyang;He Shuanhai;Huang Qiao
本文从火灾严重程度和受火部位（一跨中、负弯矩区和边撑区）两个方面，详细研究了连续钢-混凝土组合双工型梁在不同局部火灾下的抗火性能沿着变化，并分析了其破坏模式。利用ANSYS软件建立三维有限元模型，对典型的两跨连续组合双工字形桥梁（由双工字形板支撑混凝土板）进行热力耦合分析，跟踪结构的火灾性能。通过比较一个缩尺复合材料单工字梁在ISO 834火灾下的温度和挠度响应，对模型进行了验证。数值分析结果表明，所建立的模型可用于分析连续钢-混凝土组合双工字形桥梁在火灾全过程中的受力性能和破坏模式。火灾烈度和受火部位对连续组合梁桥的抗火性能有重要影响。在中拱弯矩区采取防火措施，可以显著延长连续梁的破坏时间，进而抑制结构的连续倒塌。基于腹板屈曲的破坏准则可以适用于计算实际连续梁在结构荷载和局部火灾同时作用下的抗火能力。局部火灾作用下连续组合梁在火灾暴露桥跨中呈现出显著的局部变形响应。
This paper presents a detailed investigation in to fire resistance along with failure mode in continuous steel-concrete composite twin I-shaped bridge girders under different localized fire through considering fire severity and fire exposure positions namely; mid-span zone in one of the two span, hogging moment zone and side-support zone. A 3-D finite element (FE) model, built utilizing the computer program ANSYS, is used to track structural fire performance in a typical two span of continuous composite twin I-shaped bridge girders (fabricated with twin I-shaped plates supporting a concrete slab) dependent on thermomechanical coupled analysis. The model validation is undertook through comparison of temperature and deflection response attained from a scaled composite single I-shaped girder tested exposed to ISO834 fire. The numerical analysis results show that the developed model can be favorably used to analyze the behavior and failure mode of continuous steel-concrete composite twin I-shaped bridge girders during entire range of fire exposure. Fire severity and fire exposure positions present critical influence in to the fire resistance of continuous composite bridge girders. Fire exposure prevention on hogging moment zone can significantly extend failure time of continuous girders, and further hold back progressive structural collapse. Web buckling based failure criterion can be applicable to calculate fire resistance of realistic continuous girders under simultaneous structural loading together with localized fire. Continuous composite bridge girders subjected to localized fire present highly significant local deformation response in the fire exposed bridge girder span.
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影响因子：
4.6
作者：
Zhongnan Ye;Shouchao Jiang;A. Heidarpour;Yingchao Li;Guoqiang Li
通讯作者：
Zhongnan Ye;Shouchao Jiang;A. Heidarpour;Yingchao Li;Guoqiang Li
影响因子：
4.1
作者：
Gang Zhang;V. Kodur;Chaojie Song;Shuanhai He;Qiao Huang
通讯作者：
Gang Zhang;V. Kodur;Chaojie Song;Shuanhai He;Qiao Huang
影响因子：
3.6
作者：
J. Nie;M. Tao;Jian-Sheng Fan
通讯作者：
J. Nie;M. Tao;Jian-Sheng Fan
影响因子：
3.1
作者：
U. Wickström
通讯作者：
U. Wickström
影响因子：
6.6
作者：
A. Beeby;R. Narayanan
通讯作者：
A. Beeby;R. Narayanan