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热工建筑及某些工业厂房钢筋混凝土建筑结构,需要有一定的抗热能力。这类结构在使用中往往要经受60～200℃甚至300℃以上的温度,因而在设计和制作此类结构以及在火灾条件下考虑到结构的安全性时,除了应考虑混凝土的抗热能力外,还必须考虑到钢筋性能随温度的变化情况。本文就我国大量生产和使用的20MnSi和25MnSi钢筋从室温到500℃范围内性能的变化规律及兰脆对性能的影响作一介绍,为钢筋混凝土结构的抗热设计和钢筋的生产与使用,提供一定的参考。
Thermal-construction buildings and certain industrial plants of reinforced concrete buildings require a certain amount of heat resistance. Such structures are often subjected to temperatures in the range of 60-200° C. or even 300° C. or higher. Therefore, in addition to considering the heat resistance of the concrete, when designing and fabricating such structures and considering the safety of the structure under fire conditions. , must also take into account the changes in the performance of steel bars with temperature. In this paper, we introduce the variation of properties of 20MnSi and 25MnSi rebars produced and used in China from room temperature to 500°C, and the effect of blue brittle on performance. It provides heat-resistance design of reinforced concrete structures and the production and use of steel bars. A certain reference.