Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mechanical Properties of Q345 Weathering Steel Exposed to High-Temperature After Air and Water Cooling
Weathering steel is a high-strength low alloy steel with a dense rust layer formed by alloying elements and corrosion resistance to prevent corrosion from spreading. In recent years, China has developed a new type of Q345 weathering steel (Q345WS). This study experimentally investigates the post-fire characteristics of Q345WS steel at temperatures ranging from 20 to 1000 ℃. The research analyzes the effects of air cooling and water cooling conditions on the steel, particularly focusing on residual strength post-fire. The study also compares the residual mechanical properties of Q345WS steel with those of other structural steels. When exposed to temperatures up to 600 ℃, the loss of mechanical properties could be negligible. The residual mechanical properties of Q345WS steel are significantly influenced by the high temperature and cooling method when the temperature exceeds 600 ℃. The variations in mechanical characteristics between Q345WS steel and construction steel under high temperatures should be highlighted, and comparable with findings from previous literature on various steel types. A series of polynomial prediction equations have been suggested to forecast the alterations in the mechanical attributes of Q345WS following exposure to fire, offering a methodical and conceptual foundation for assessing steel structures and carrying out post-fire retrofitting.
Mechanical Properties of Q345 Weathering Steel Exposed to High-Temperature After Air and Water Cooling
Weathering steel is a high-strength low alloy steel with a dense rust layer formed by alloying elements and corrosion resistance to prevent corrosion from spreading. In recent years, China has developed a new type of Q345 weathering steel (Q345WS). This study experimentally investigates the post-fire characteristics of Q345WS steel at temperatures ranging from 20 to 1000 ℃. The research analyzes the effects of air cooling and water cooling conditions on the steel, particularly focusing on residual strength post-fire. The study also compares the residual mechanical properties of Q345WS steel with those of other structural steels. When exposed to temperatures up to 600 ℃, the loss of mechanical properties could be negligible. The residual mechanical properties of Q345WS steel are significantly influenced by the high temperature and cooling method when the temperature exceeds 600 ℃. The variations in mechanical characteristics between Q345WS steel and construction steel under high temperatures should be highlighted, and comparable with findings from previous literature on various steel types. A series of polynomial prediction equations have been suggested to forecast the alterations in the mechanical attributes of Q345WS following exposure to fire, offering a methodical and conceptual foundation for assessing steel structures and carrying out post-fire retrofitting.
Mechanical Properties of Q345 Weathering Steel Exposed to High-Temperature After Air and Water Cooling
Int J Steel Struct
Yang, Suhang (Autor:in) / Cao, Xiaoyun (Autor:in) / Xu, Zhifeng (Autor:in)
International Journal of Steel Structures ; 25 ; 204-217
01.02.2025
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Corrosion-characteristics and -mechanism of Weathering Steel Q345 in Tropical Marine Atmosphere
| British Library Online Contents | 2018