三面受火的内配型钢方钢管混凝土柱火灾全过程分析

毛文婧; 王文达; 王景玄

doi:10.6052/j.issn.1000-4750.2015.05.S011

三面受火的内配型钢方钢管混凝土柱火灾全过程分析

兰州理工大学甘肃土木工程防灾减灾重点实验室, 兰州 730050

基金项目: 国家自然科学基金项目(51468037);甘肃省委组织部"陇原青年创新人才扶持计划"项目

详细信息

作者简介:
毛文婧(1990-),女,甘肃人,博士生,主要从事内配型钢的钢管混凝土构件受火性能的研究(E-mail:cemaowj@163.com);王景玄(1986-),男,甘肃人,博士生,主要从事钢管混凝土结构抗火及抗连续性倒塌性能的研究(E-mail:cewangjx@163.com).

通讯作者:
王文达(1976-),男,甘肃人,教授,博士,从事钢与混凝土组合结构、混合结构及结构抗火性能的研究(E-mail:wangwd@lut.cn).

中图分类号: TU398.9
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出版历程
- 收稿日期: 2015-05-01
- 修回日期: 2015-12-27
- 刊出日期: 2016-06-24

PERFORMANCE ANALYSIS OF CONCRETE-FILLED SQUARE STEEL TUBULAR COLUMNS WITH INTERNAL PROFILED STEEL UNDER THREE-FACE FIRE CONDITIONS

Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China

摘要

摘要: 采用有限元软件ABAQUS建立了标准火灾作用下内配型钢方钢管混凝土柱的热力耦合模型,并与已有的试验进行了对比和验证。计算了该类构件在火灾全过程作用下的荷载-轴向位移、荷载-跨中侧向位移的关系曲线,分析了该类构件在常温加载、升温、降温、火灾后再加载四个阶段的应力变化情况,并将强轴和弱轴两种加载方式下的结果进行了对比。在此基础上,对影响火灾后剩余承载力影响系数的主要参数进行了分析。结果表明:火灾荷载比、升温时间比、长细比等因素对该类构件火灾后剩余承载力有较显著的影响。
- 内配型钢钢管混凝土 /
- 偏压构件 /
- 火灾全过程 /
- 剩余承载力系数 /
- 力学性能
Abstract: A finite element (FE) model of concrete filled square steel tubular column with internal profiled steel under standard fire conditions was developed using ABAQUS software. The FE model was verified with experimental results. The loading versus axial displacement curves were calculated in overall stage fire conditions, and loading versus lateral displacement curves were also studied. The stress distribution was analyzed in loading at the ambient stage, heating stage, cooling stage, and post fire stage. The results under loading at major axis and secondary axis were compared. The main parameters that affected the residual bearing capacity coefficients after exposure to full stage fire conditions were analyzed. The results show that the fire loading ratio, fire duration time ratio, and the slenderness ratio of column have significant effect on the residual bearing capacity.
- concrete-filled steel tubular column with internal profiled steel /
- eccentric compression /
- overall stage fire /
- residual bearing capacity coefficient /
- mechanical performance

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参考文献(11)

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