Abstract: Under fire exposure, the mechanical properties of steel structure materials deteriorate, which is prone to causing fire-induced failure of steel members. Monitoring the temperature of structural members and establishing early warning and prediction methods for their fire-induced failure have long been the focus of fire fighting and rescue personnel. This paper studies the early warning and prediction technology for fire-induced failure of steel structure columns and its application method in actual building fires. An early warning system for fire-induced failure of steel structure columns based on temperature monitoring is developed and verified through fire tests on H-shaped steel short columns. The results show that the developed early warning system can realize over-heating warning inside the building, over-heating warning at the external rescue command center, and real-time monitoring of ambient temperature, and can provide early warning and prediction for fire-induced failure of steel structure columns in building fires.

Key words: steel structure columns, early warning and prediction, over-heating warning, real-time monitoring