This paper investigates the structural performance of load-bearing precast concrete sandwich panels subjected to one-sided fire. It focuses on panels made with FRP diagonal-bar connectors. Heat transfer analysis is conducted for characterizing the temperature gradient within the panel and a structural model is developed. The model considers the composite action between the reinforced concrete (RC) wythes, the transient creep of concrete under fire, strain softening in compression, cracking and tension stiffening, yielding of the steel reinforcement and geometric nonlinearity. The heat transfer analysis is conducted using a finite element approximation, and the governing differential equations of the structural model are solved using the nonlinear shooting method following an iterative procedure. The model is validated through comparisons with test results and other models in the literature. A numerical example and a parametric study that show the capabilities of the proposed model and clarify the structural behavior are presented. The results reveal progressive failures of the FRP-bar connectors and buckling failures of the panels under fire. It is revealed that the load eccentricity of the applied load greatly affects both the structural performance and the fire resistance of the panels. The diameter of FRP bars, the thickness of insulation layer and the load level are also found to play key roles in the fire resistance of the panels.

本文研究了承受单面火灾的承重预制混凝土夹芯板的结构性能。它专注于由FRP对角杆连接器制成的面板。进行传热分析以表征面板内的温度梯度，并开发出结构模型。该模型考虑了钢筋混凝土和混凝土之间的复合作用，火灾下混凝土的瞬态蠕变，压缩，开裂和拉伸硬化中的应变软化，钢筋的屈服以及几何非线性。使用有限元逼近进行传热分析，并使用非线性射孔法按照迭代过程求​​解结构模型的控制微分方程。通过与测试结果和文献中的其他模型进行比较来验证该模型。数值示例和参数研究表明了所提出模型的功能并阐明了结构行为。结果显示了FRP杆连接器的渐进式故障和着火时面板的屈曲故障。结果表明，所施加载荷的载荷偏心率极大地影响了面板的结构性能和耐火性。还发现玻璃钢棒的直径，绝缘层的厚度和载荷水平在面板的耐火性中起着关键作用。结果显示了FRP杆连接器的渐进式故障和着火时面板的屈曲故障。结果表明，所施加载荷的载荷偏心率极大地影响了面板的结构性能和耐火性。还发现玻璃钢棒的直径，绝缘层的厚度和载荷水平在面板的耐火性中起着关键作用。结果显示了FRP杆连接器的渐进式故障和着火时面板的屈曲故障。结果表明，所施加载荷的载荷偏心率极大地影响了面板的结构性能和耐火性。还发现玻璃钢棒的直径，绝缘层的厚度和载荷水平在面板的耐火性中起着关键作用。