Abstract: In order to meet the demand for lightweight, ultra-high fire partition wall in large industrial plants, a steel-framed rock wool sandwich panel ultra-high fire partition wall is proposed, and its fire resistance and stability are studied. Using the heating method of ISO-834 standard heating temperature-time curve, a scaled-down 1:0.3 rock wool sandwich panel fire partition wall is tested by a one-sided fire test. Based on the finite element software ABAQUS, both scaled and full-scale models are established to investigate the temperature field changes on the fire-exposed and non-fire-exposed sides before and after the fire optimization of the fire partition wall. The results indicate that the temperature and deformation of the scaled experimental model are basically consistent with the scaled finite element model. After fire optimization, the maximum temperature on the non-fire-exposed side of the full-scale finite element model of the rock wool sandwich panel ultra-high fire partition wall decreased by 64.3%, and the maximum deformation decreased by 75.5%. The fire resistance and stability were significantly improved, meeting the requirements for thermal insulation and integrity of fire partition wall in the Fire-resistance tests-Elements of building construction. In terms of fire partition wall design, a steel-framed rock wool sandwich panel ultra-high fire partition wall with a weight of 50 kg/m2 requires a steel column every 8 m in the span direction and a steel beam every 4 m in the height direction, providing a reference for the design of lightweight, ultra-high fire partition wall with steel framed rock wool sandwich panels.

Key words: lightweight ultra-high fire partition wall, finite element analysis, temperature field rule, centroid displacement