Numerical study on fire resistance of rectangular section stainless steel-concrete composite beam

被引：12
|
作者：
Ding, Runmin [1 ]
Fan, Shenggang [1 ]
Wu, Mingze [1 ]
Li, Yang [2 ]
机构：
[1] Southeast Univ, Sch Civil Engn, Minist Educ, Key Lab Concrete & Prestressed Concrete Struct, Jiulonghu Campus, Nanjing 211189, Peoples R China
[2] East China Urban Architectural Design & Res Inst, Shanghai 200000, Peoples R China
来源：
FIRE SAFETY JOURNAL | 2021年 / 125卷
基金：
中国国家自然科学基金;
关键词：
Fire; Stainless steel composite beam; Temperature field; Temperature additional bending moment; Critical temperature; STRESS-STRAIN CURVES;
D O I：
10.1016/j.firesaf.2021.103436
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
To investigate the fire resistance of stainless steel-concrete composite beams (referred to as stainless steel composite beam), numerical simulations of rectangular section stainless steel composite beams under fire were carried out. The influences of load ratio, thickness of concrete slab, width of concrete slab, reinforcement ratio of concrete slab, height of stainless steel beam, width of stainless steel beam and span of composite beam on the fire resistance of rectangular section stainless steel composite beams were analyzed. Due to the large coefficient of thermal expansion of stainless steel material, the expansion of stainless steel beam will produce an additional bending moment in the stainless steel composite beam under fire, which has a great influence on the fire resistance of stainless steel composite beams. Finally, a simplified calculation method of temperature field distribution of rectangular section stainless steel composite beam was proposed. To adjust and enlarge the maximum bending moment at the mid-span of stainless steel composite beam, the coefficient of temperature additional bending moment was introduced into the calculation formula of critical temperature of stainless steel composite beams, which effectively improves the accuracy of the fire-resistant design method for stainless steel composite beams.
引用
收藏
页数：14
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