大型钢结构发展迅猛，但经过长期服役，一旦发生破坏，后果十分严重，因此开展钢结构健康监测具有重大意义。以普通Q235钢板为研究对象，在其下表面铺设自制的碳纤维智能层，并对其进行3点弯曲试验，试验过程中钢板下表面的智能层的电阻变化率的变化与钢板下表面的平均应变的变化呈现很好的一致性。智能层的电阻变化率随钢板应变线性变化，灵敏度高，且具有很好的重复性。试验结果表明：根据碳纤维智能层的良好传感特性，可以实现钢结构服役过程中应变场的监测。
The large steel structures are developing very rapidly. But after a long time service, once damages occur, the consequences are very serious, so it is of great significance to carry out health monitoring of steel structures. The three-point bending test was employed on Q235 steel plate with carbon fiber smart layer on the lower side. The result shows that the resistance change rate of carbon fiber smart layer had stable corresponding relationship with the average strain of steel plate. The resistance change rate of carbon fiber smart layer changed linearly with the strain of steel plate with high sensitivity and satisfactory repeatability. According to nice sensing properties of carbon fiber smart layer, the strain field monitoring of steel structures can be achieved during service.
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