Mineral wool is an insulation material commonly used in passive fire protection (PFP) systems on offshore installations. Insulation materials have only been considered functional materials for thermal analysis in the conventional offshore PFP system design method. Hence, the structural performance of insulation has yet to be considered in the design of PFP systems. However, the structural elements of offshore PFP systems are often designed with excessive dimensions to satisfy structural requirements under external loads such as wind, fire and explosive pressure. To verify the structural contribution of insulation material, it was considered a structural material in this study. A series of material tensile tests was undertaken with two types of mineral wool at room temperature and at elevated temperatures for fire conditions. The mechanical properties were then verified with modified methods, and a database was constructed for application in a series of nonlinear structural and thermal finite-element analyses of an offshore bulkhead-type PFP system. Numerical analyses were performed with a conventional model without insulation and with a new suggested model with insulation. These analyses showed the structural contribution of the insulation in the structural behaviour of the PFP panel. The results suggest the need to consider the structural strength of the insulation material in PFP systems during the structural design step for offshore installations.

矿棉是一种常用于海上设施被动防火 (PFP​​) 系统的绝缘材料。在传统的海上 PFP 系统设计方法中，绝缘材料仅被视为用于热分析的功能材料。因此，在 PFP 系统的设计中尚未考虑绝缘的结构性能。然而，海上 PFP 系统的结构元件通常设计得过大，以满足在风、火和爆炸压力等外部载荷下的结构要求。为了验证绝缘材料的结构贡献，本研究将其视为结构材料。使用两种类型的矿棉在室温和高温火灾条件下进行了一系列材料拉伸试验。然后用改进的方法验证机械性能，并构建了一个数据库，用于海上舱壁式 PFP 系统的一系列非线性结构和热有限元分析。使用没有绝缘的传统模型和带有绝缘的新建议模型进行了数值分析。这些分析显示了绝缘材料对 PFP 面板结构行为的结构贡献。结果表明，在海上设施的结构设计步骤中，需要考虑 PFP 系统中绝缘材料的结构强度。使用没有绝缘的传统模型和带有绝缘的新建议模型进行了数值分析。这些分析显示了绝缘材料对 PFP 面板结构行为的结构贡献。结果表明，在海上设施的结构设计步骤中，需要考虑 PFP 系统中绝缘材料的结构强度。使用没有绝缘的传统模型和带有绝缘的新建议模型进行了数值分析。这些分析显示了绝缘材料对 PFP 面板结构行为的结构贡献。结果表明，在海上设施的结构设计步骤中，需要考虑 PFP 系统中绝缘材料的结构强度。