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中文摘要：
高强钢丝作为钢缆索的主要承力部件,它的受力情况直接影响到钢缆索的安全状况,对高强钢丝进行应力监测是评价钢缆索安全状况的有效手段,也是进行钢缆索整体索力监测的研究基础.综述了传统的钢结构应力监测方法,讨论了基于磁弹效应的应力监测方法的优势并详细介绍了它的基本原理——磁弹效应.建立了进行高强钢丝应力监测研究的实验装置,开发了一套基于LabVIEW平台的测试系统,并对7 mm高强钢丝进行了基于磁弹效应的应力监测实验.实验表明,基于磁弹效应的应力监测方法不需要了解受力历史,可直接对高强钢丝的应力进行测量,且具有较高测试精度、较好的稳定性和可重复性,对在役钢结构的长期应力监测具有良好的应用前景.
英文摘要：
The high-strength steel wires are the essential forcing components of steel cables.The forcing state of the former affects the safety of the latter.Stress monitoring of the high-strength steel wires is one of the effective measures to investigate the cable safety,and also provides research foundation for monitoring of the cable force.The traditional methods for steel stress monitoring were reviewed.The superiorities of the elastomagnetic （EM） sensor were then discussed,and the working principle-EM effect was addressed in detail.The experimental setup for stress monitoring of high-strength steel wires was built,and a LabVIEW platform based testing system was developed.The experiment was conducted on the EM effect based stress monitoring of a 7 mm-diameter high-strength steel wire.It was found that the EM sensor is able to directly measure the stress of the steel wire without knowing its stress history,with high accuracy,good stability and repeatability,and is thus promising in long-term stress monitoring of in-service steel structures.
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