EXPERIMENTAL STUDY ON POST-FIRE MECHANICAL PROPERTIES OF HIGH STRENGTH FIRE-RESISTANT STEEL

被引：0
|
作者：
Lou G.-B. [1 ,2 ]
Fei C.-N. [1 ]
Wang Y.-B. [1 ]
Chen L.-H. [3 ]
机构：
[1] College of Civil Engineering, Tongji University, Shanghai
[2] State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai
[3] Nanjing Iron & Steel Co., LTD., Nanjing
来源：
Gongcheng Lixue/Engineering Mechanics | 2022年 / 39卷 / 09期
关键词：
fire-resistant steel; mechanical properties; post-fire; post-fire temperature; tensile test;
D O I：
10.6052/j.issn.1000-4750.2021.05.0380
中图分类号：
学科分类号：
摘要：
A series of static tensile tests on high-strength fire-resistant steel such as grades Q460FR, Q420FR, Q345FR after fire were carried out in this study. The stress-strain curves and mechanical parameters of high-strength fire-resistant steel with post-fire temperatures from 200℃ to 800℃ were obtained. After comparing their mechanical properties with those of ordinary structural steels after high-temperature cooling, the coefficient of variation fitting equationthe of yield strength and tensile strength were proposed. It is shown that: the yield strength and tensile strength of high-strength fire-resistant steel with natural cooling after fire have been improved, while the modulus of elasticity is not influenced by exposing to fire. The results of this study can be applied to the assessment of load-bearing performance of fire-resistant steel structures after fire. © 2022 Tsinghua University. All rights reserved.
引用
下载
收藏
页码：153 / 159
页数：6
相关论文
共 18 条
  • [1] Wang Qingmin, Wang Zhongmin, Liu Yingxin, Summary of research and applications of fire proof steel for high rise building, Wide and Heavy Plate, 26, 4, pp. 45-48, (2020)
  • [2] Yang Caifu, Zhang Yongquan, Development of fire-resistant steel for buildings, Steel Construction, 12, 38, pp. 29-34, (1997)
  • [3] Lou Guobiao, Fei Chuni, Wang Yanbo, Et al., Experimental study on mechanical properties of high strength fire-resistant steel at elevated temperatures, Journal of Building Structures, (2021)
  • [4] Feng Chengyuan, Li Guoqiang, Jiang Binhui, The influence of high-temperature material model of steel on the simulation of collapse of steel frame structure under fire, Engineering Mechanics, 36, 12, pp. 24-36, (2019)
  • [5] Yang Yong, Wei Bo, Xue Yicong, Et al., Experimental study on post-fire performance of partially precast steel reinforced concrete columns subjected to eccentric compression, Engineering Mechanics, 37, 3, pp. 108-119, (2020)
  • [6] Lu Jie, Liu Hongbo, Chen Zhihua, Et al., Experimental investigation into the post-Fire mechanical properties of hot-rolled and cold-formed steels [J], Journal of Constructional Steel Research, 121, pp. 291-310, (2016)
  • [7] Gunalan S, Mahendran M., Experimental investigation of post-fire mechanical properties of cold-formed steels [J], Thin-Walled Structures, 84, pp. 241-254, (2014)
  • [8] Qiang X H, Frans S, Bijlaard K, Et al., Post-fire mechanical properties of high strength strength structural steels S460 and S690 [J], Engineering Structures, 35, pp. 1-10, (2012)
  • [9] Qiang X H, Frans S, Bijlaard K, Et al., Post-fire performance of very high strength steel S960 [J], Journal of Constructional Steel Research, 80, pp. 235-242, (2013)
  • [10] Li Guoqiang, Lu Huibao, Zhang Chao, Experimental research on post-fire mechanical properties of Q690 steel, Journal of Building Structures, 38, 5, pp. 109-116, (2017)
12