Experimental Study on Mechanical Properties of Q345 Steel after High Temperature Cooling

• 作者: Chuntao Zhang
• 来源期刊: 世界工程和技术(英文)
• 学科: 工学
• 关键词: Q345 Steel High Temperature Natural Cooling Mechanical Properties
• 年，卷（期）: 2020,（3）
• 页码范围: 257-265
• 页数: 9页
• 分类号: TG1

摘要

Because of its advantages of light weight, high strength and convenient construction, steel structure has gradually become the first choice for large-span and high-rise structures. The use of high strength steel in building engineering can reduce the section size of components and the weight of the structure, thus increasing the building area. But steel is not fire-resistant, when the temperature reaches 600<span style="white-space:nowrap;">°</span>C, steel loses most of the stiffness and strength. Therefore, it is of great significance to study the fire resistance of steel structures, and the mechanical properties of steel structures at high temperature are the foundation of the fire resistance research. The mechanical properties of steel after high temperature are the basis for the safety assessment of steel structure after fire. Therefore, this paper studies the mechanical properties of Q345 steel after high temperature cooling.