| 基于逆有限元法的形状还原传感阵列及桥梁挠度监测试验 |
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| 引用本文： | 雷雨恒,任亮,李宏男,尤润州,魏易博. 基于逆有限元法的形状还原传感阵列及桥梁挠度监测试验[J]. 工程力学, 2022, 39(11): 89-96. DOI: 10.6052/j.issn.1000-4750.2021.06.0465 |
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| 作者姓名： | 雷雨恒 任亮 李宏男 尤润州 魏易博 |
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| 作者单位： | 大连理工大学建设工程学部,辽宁,大连,116024 |
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| 基金项目： | 国家自然科学基金项目(52027811)；大连市高层次人才创新支持计划项目(2019RD01) |
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| 摘 要： | 桥梁挠度是桥梁工程从设计阶段到运维阶段的重要控制指标，对其进行实时监测对桥梁工程的性能评估至关重要。该文提出一种形状还原传感阵列，该传感阵列基于逆有限元方法，仅通过有限点的实测应变数据即可实时、准确地还原出桥梁挠曲线。详细阐述了逆有限元法基本原理与形状还原传感阵列装置，将该项技术应用于混凝土自锚式悬索桥梁模型进行挠度监测试验研究，分别对桥梁模型进行静态加载与动态加载，通过水准仪与激光位移计对还原得到的挠曲线形状与精度进行验证。结果表明:形状还原传感阵列对于桥梁挠度的监测具有易于安装、数据准确、实时性好的优点，不仅可以准确还原出桥梁挠度，而且可以实时反演出桥梁挠曲线形状，能够有效地评估桥梁工程性能质量。
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| 关 键 词： | 桥梁挠度 逆有限元法 形状还原传感阵列 结构监测 欧拉-伯努利梁 |
| 收稿时间： | 2021-06-20 |
SHAPE-SENSING ARRAY BASED ON INVERSE FINITE ELEMENT METHOD AND EXPERIMENT OF BRIDGE DEFLECTION MONITORING |
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| Affiliation: | Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China |
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| Abstract: | Bridge deflection is an important indicator for the bridges from their design to their operation and maintenance stage. Real-time monitoring is crucial for the performance evaluation of bridges. A shape-sensing array based on the inverse finite element method (iFEM) is proposed. The deflection curve of a bridge can accurately be obtained by the strain data measured at limited points in real-time. Thusly, the basic principle of inverse finite element method and shape inversion sensing array device are described in detail. The technology is applied to the experimental study of deflection monitoring of a concrete self-anchored suspension bridge model. Static loading and dynamic loading were carried out on the bridge model, and the shape and the accuracy of the inverted deflection curve were verified by level gauge and laser displacement sensor. The results show that the shape-sensing array has the advantages of easy installation, good data accuracy and, excellent real-time performance for bridge deflection monitoring. This technology can accurately obtain bridge deflections and invert the curvature of deflection in real-time, which can effectively evaluate the performance and quality of a bridge. |
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