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首页> 外文期刊>KSCE journal of civil engineering >Numerical Simulation for Synergetic Deformation of Optical Fiber Sensor and Asphalt Mixture
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Numerical Simulation for Synergetic Deformation of Optical Fiber Sensor and Asphalt Mixture

机译：光纤传感器与沥青混合料协同变形的数值模拟

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摘要

Owing to the structural and material differences, data obtained by distributed optical fiber sensors (OFS) for asphalt pavement strain measurement lack of precision. For better understanding OFS measurement mechanism and investigating the measurement error correction, this study analyzed the synergetic deformation of OFS and asphalt mixture (AM) under load. Firstly, a three-dimensional AM single-edge notched beam (SEB) model with OFS was established and verified using the discrete element method. Secondly, the micro-crack propagation of SEB model during loading procedure was analyzed to explore the debonding behavior between OFS and AM. Thirdly, strain development of OFS and AM was investigated during fracture stage and post-fracture stage. Finally, a measurement error correction method was developed based upon the materials and test conditions in this study. Results demonstrate that debonding occurs on OFS surface when macro-crack extends across OFS position. The key to making the strain measurement accuracy is to ensure the effective bonding between OFS and AM. In addition, this study provides a framework used to develop the measurement error correction, and the research results give the theoretical foundation for data selection and error correction of asphalt pavement strain measurement and crack detection using distributed optical fiber sensors.
机译：由于结构和材料的差异，用于沥青路面应变测量的分布式光纤传感器（OFS）获得的数据缺乏精度。为了更好地了解OFS的测量机理并研究测量误差的校正方法，本研究分析了OFS与沥青混合料（AM）在载荷作用下的协同变形。首先，建立了带有OFS的三维AM单边缺口光束（SEB）模型，并采用离散元方法进行了验证。其次，分析了SEB模型在加载过程中的微裂纹扩展，以探讨OFS和AM之间的剥离行为。第三，研究了OFS和AM在断裂阶段和断裂后阶段的应变发展。最后，根据材料和测试条件，开发了一种测量误差校正方法。结果表明，当宏观裂纹扩展到OFS位置时，会在OFS表面发生剥离。保证应变测量精度的关键是确保OFS和AM之间的有效结合。此外，本研究提供了用于进行测量误差校正的框架，研究结果为使用分布式光纤传感器的沥青路面应变测量和裂缝检测的数据选择和误差校正提供了理论基础。

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