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核电站安全壳是防止核泄漏的最后安全屏障。该文基于某核电厂预应力安全壳的1∶10结构模型,开展试验研究。利用内部水压来模拟事故中安全壳的压力,试验通过数百个传感器和数据采集系统详细测得安全壳各部位的受力过程。在试验中,先加载至结构破坏,然后采用外包碳纤维布的方式进行加固并再次加载试验。在ANSYS中建立了安全壳模型的有限元模型进行分析,试验和计算结果表明CFRP加固能够显著提高安全壳结构的承压能力,同时也能有效控制安全壳结构的变形和裂缝发展。有限元计算分析结果与试验结果吻合良好,能够用来预测碳纤维布加固后结构的表现。
Nuclear power plant containment is the last safety barrier to prevent nuclear leaks. Based on the 1:10 structure model of prestressed containment in a nuclear power plant, a pilot study was carried out. The internal water pressure was used to simulate the pressure of the containment in the accident. The force of various parts of the containment was measured in detail through hundreds of sensors and data acquisition system. In the test, the structure was first loaded to damage, and then use carbon fiber cloth to reinforce the way and reloading test. The finite element model of the containment model was established in ANSYS. The test and calculation results show that the CFRP reinforcement can significantly improve the bearing capacity of the containment structure and effectively control the deformation and crack development of the containment structure. The finite element analysis results are in good agreement with the experimental results and can be used to predict the structural performance of the CFRP sheet.