Influence of Fire on the Component and Performance for the Concrete of Reinforced Concrete Beams
2020 3rd International Conference on Electron Device and Mechanical Engineering (ICEDME)(2020)
摘要
This paper adopts experimental methods to investigate the component and microstructure of the concrete slab in reinforced concrete (RC) bridges after fire hazards, and the obtained results show that the com ponent and microstructure of concrete slabs will change significantly after fire hazards. Specifically, after the RC beams undergo a fire in low temperature (lower than 400°C), since the structure of cement stone in concrete is relatively compact, the fire product transforms from compact hydrated calcium silicate to island-like calcium silicate, leading the structure to become loose. After the RC beams undergo a fire in high temperature (higher than 400°C), the decomposition of the crystal inside the concrete causes large number of cracks and voids inside the structure, leading to the microscopic damage and decrease in strength of concrete. This paper preliminarily reveals the damage mechanism of RC bridges after fire hazards through the experimental study. It lays a theoretical foundation for the research of bridges’ performance deterioration.
更多查看译文
关键词
Highway bridges,Fire,Concrete slab,Component and performance of concrete
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要