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A long-term vertical displacement prediction method of concrete bridges based on meteorological shared data and optimized GRU model

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Measurement: Journal of the International Measurement Confederation 2025年 253卷

作者： Wang, Xu Xie, Guilin Liu, Wentao Kong, Hu Gao, Yang State Key Laboratory of Mountain Bridge and Tunnel Engineering Chongqing Jiaotong University Chongqing400074 China School of Civil Engineering Chongqing Jiaotong University Chongqing400074 China China Merchants Chongqing Road Engineering Inspection Center Co. Ltd Chongqing400067 China Department of Civil and Transportation Engineering Hohai University Nanjing210098 China Key Laboratory for Structure Health Monitoring and Control in Hebei Province Shijiazhuang Tiedao University Shijiazhuang050043 China

Based on data from the meteorological shared data platform, this study proposes a method for predicting the long-term vertical displacement (VD) of concrete bridges by integrating the Northern Goshawk Optimization (NGO) algorithm with the Gated Recurrent Unit (GRU) network. This method can be employed to safely assess concrete bridges and recover missing VD data. Specifically, it uses historical meteorological information and time information provided by the meteorological shared data platform (European Centre for Medium-Range Weather Forecasts) to generate the input parameters of the GRU model. It then employs the long-term VD data from the concrete bridge structural health monitoring system to produce the output parameters of the GRU model. Moreover, the hyperparameters for the GRU model training are optimized using the NGO algorithm. Four NGO-GRU models with different input conditions are proposed, taking the long-term VD prediction of a prestressed concrete bridge as a case study and considering the correlation between different meteorological factors and VD and the long-term time-dependent effects on concrete structures. Through a comparative analysis of the model's prediction performance of multiple sensors under different conditions, it is found that the NGO-GRU model achieved the best prediction performance when using a combination of air temperature, time information, air pressure, solar radiation intensity, and wind speed as inputs, with a prediction error of less than 6.00%. Furthermore, compared with the benchmark models, the NGO-GRU model demonstrated the highest accuracy in VD prediction. Under the optimal input conditions, the prediction performance of the NGO-GRU model improved by 16.46% to 46.17% compared with the other models, validating the robustness and effectiveness of the proposed method. © 2025 Elsevier Ltd

关键词： Concrete bridges Long-term monitoring Meteorological shared data Northern goshawk optimization-based GRU Structural health monitoring Vertical displacement

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Analysis on a novel reflective intensity modulated fiber optic temperature sensor

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World Forum on Smart Materials and Smart structures Technology, SMSST 07

作者： Dai, Jingyun Zhang, Wentao Sun, Baochen Du, Yanliang Key Lab. of Structure Health Monitoring and Control of Hebei Province Shijiazhuang Railway Institute Shijiazhuang Hebei China State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing China

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FBG sensor network in Qinghai-Tibet railway

FBG sensor network in Qinghai-Tibet railway

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Network Architectures, Management, and Applications V

作者： Zhang, Wentao Dai, Jingyun Sun, Baochen Du, Yanliang Key Lab. of Structure Health Monitoring and Control of Hebei Province Shijiazhuang Railway Institute Shijiazhuang Hebei 050043 State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing 100083

ISBN: (纸本)9780819469472

In this paper, fiber Bragg grating (FBG) sensors network in the subgrade temperature monitoring system in Qinghai-Tibet railway is presented. The principle of the FBG temperature sensor is introduced and the feasibility of the FBG sensors in the permafrost regions of Qinghai-Tibet plateau is analyzed. The FBG sensor network architecture is introduced. This sensor network includes the sensor chains embedded in the roadbed, slave optical cables, work stations including the FBG sensor interrogator and the optical router, master optical cables, and center workstation. We give the primary experimental result of this sensor network in monitoring the roadbed temperature of the railway at DK0985+000 near Chumar River. Fifteen FBG temperature sensors were embedded into the roadbed monitoring hole. The temperature data was collected after a month when the temperature field in the monitoring hole is stable. The result of the experiment shows that the FBG temperature sensors have an accuracy of 0.1 centigrade. Furthermore, the experimental result shows the stability and reliability of the FBG sensor network in the harsh environment of Qinghai-Tibet plateau. In the end, the conclusion is drawn and the prospect of the FBG sensor network in monitoring other parameters in the Qinghai-Tibet plateau is also presented.

关键词： Optical sensors

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A novel fiber-mercury temperature sensor

A novel fiber-mercury temperature sensor

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Fundamental Problems of Optoelectronics and Microelectronics III

ISBN: (纸本)0819467278

Fiber optic sensors are widely used in structure monitoring and smart materials to measure the temperature. In this paper, a novel fiber-mercury temperature sensor (FMTS) is designed and tested. The sensor is made using the surface of the mercury to act as the reflector. The intensity of the reflective light is the function of the distance between the surface of the mercury and the fiber end, which is determined by the thermal extension of the mercury. And different length of the mercury in the capillary defines different sensitivity of the sensor. The modulation function of the sensor is analyzed. Experiment was carried out to evaluate the performance of the sensor, and the results present a good correlation between the theoretical and experimental result.

关键词： Temperature sensors

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Effects of the reattachment on dry galloping in the critical Reynolds number range 9

Effects of the reattachment on dry galloping in the critical...

引用

9th Asia Pacific Conference on Wind Engineering, APCWE 2017

作者： Ma, Wenyong Liu, Qingkuan Liu, Xiaobing Key Laboratory for Health Monitoring and Control of Large Structure Shijiazhuang Tiedao University Hebei province China Department of Wind Science and Engineering Shijiazhuang Tiedao University Shijiazhuang City Hebei Province China

Large amplitude vibrations of circular cylinders in the critical Reynolds number range are reproduced in wind tunnels. Displacements and wind pressure for the cylinders are measured synchronously to reveal the characteristics of aerodynamic force for the vibrating cylinders in a Reynolds number range where flow re-attaches on the rear of the cylinder. Effects of these reattachments on the aerodynamic forces and the vibrations are discussed. The results show that the reattachment can produce unsteady aerodynamic force and excite large amplitude vibration when it forms unstable separation bubble at the early critical Reynolds number range. Once it develops stable separation bubble, the reattachment mitigates the vibrations by creating strong negative aerodynamic damping. © 9th Asia Pacific Conference on Wind Engineering, APCWE 2017. All Rights Reserved.

关键词： Circular cylinders

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Experiment on dynamic response of fiber optic Fabry-Perot sensors and its application in structural health monitoring

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World Forum on Smart Materials and Smart structures Technology, SMSST 07

作者： Zhang, Wentao Dai, Jingyun Sun, Baochen Du, Yanliang Key Lab. of Structure Health Monitoring and Control of Hebei Province Shijiazhuang Railway Institute Shijiazhuang Hebei China State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing China

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A novel fiber optic concrete sensor based on EFPI

A novel fiber optic concrete sensor based on EFPI

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International Conference on Smart Materials and Nanotechnology in Engineering

作者： Zhang, Wentao Dai, Jingyun Sun, Baochen Du, Yanliang Key Lab. of Structure Health Monitoring and Control of Hebei Province Shijiazhuang Railway Institute Shijiazhuang Hebei 050043 China State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing 100083

ISBN: (纸本)9780819465368

In this paper, a novel fiber optic concrete sensor based on extrinsic fiber Fabry-Perot interferometer (EFPI) is designed and analyzed. Two fiber ends are inserted into a glass capillary and encapsulated into a cement cylinder to act as the sensor head. In this way, the cement cylinder itself is the sensor head instead of the traditional steel tube, which makes it very convenient to embed the sensor head into the concrete, because the cement consists with the concrete well. Based on the theory of white light interferometry and the theory of elasticity, the wavelength modulation method and the strain transfer are analyzed theoretically. The demodulation system is also introduced in this paper. The experiment being made by our research group is aimed at testing the consistency, stability, reliability and the sensitivity of the fiber optic sensor. The sensor head of the cement cylinder is embedded into a model ferroconcrete beam together with traditional strain gauges. The experiment is carried out using the PEM-500A hydraulic pulsation fatigue test machine after 2 million stress circles. The readout of the fibre optic sensor and the strain gauges is recorded and made a contrast. It can be found from the result that the fibre optic sensors have good stability and reliability, the accuracy for the fibre optic sensor is better than 0.5 micro-strain, which shows that the sensor can meet the demand of the long-term monitoring of large-size concrete structure.

关键词： Fiber optic sensors

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Analysis on strain transfer of fiber optic Fabry-Perot sensors-based on FEM method

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World Forum on Smart Materials and Smart structures Technology, SMSST 07

作者： Zhang, Wentao Dai, Jingyun Sun, Baochen Du, Yanliang Key Lab. of Structure Health Monitoring and Control ofHebei Province Shijiazhuang Railway Institute Shijiazhuang Hebei China State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing China

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Low-cost and miniature all-silica Fabry–Perot pressure sensor for intracranial pressure measurement

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Chinese Optics Letters 2014年第11期12卷 49-52页

作者：李玉婷张文涛王兆刚许红彬韩晶李芳 Optoelectronics System Laboratory Institute of SemiconductorsChinese Academy of Sciences Key Laboratory of Structure Health Monitoring and Control of Hebei Province Shijiazhuang Tiedao University

The monitoring of increased intracranial pressure（ICP） is necessary in the diagnosis and treatment of patients with neurological disease because it can provide an insight into the mechanism of the head injury. In this letter, we develop a novel miniature Fabry–Perot（F-P） sensor for ICP measurement. The proposed sensor is fabricated by using a commercially available fusion splicer and a fiber cleaver, by which many difficult art problems involved in fabrication are solved and the online monitoring of the F-P cavity is actualized. The sensor exhibits a linear response to the applied pressure over the range of 0–25 k Pa（ample for ICP measurement）, with a sensitivity of 10.18 nm/k Pa, a resolution of 0.1 k Pa, and a reduced thermal sensitivity of 0.068 nm/°C, which shows it can meet the requirements of ICP measurement.

关键词： Low-cost and miniature all-silica Fabry Perot pressure sensor for intracranial pressure measurement ICP length

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structure crack monitoring based on long-gauge FBG sensor 2nd

Structure crack monitoring based on long-gauge FBG sensor

引用

2nd International Conference of Structural health monitoring and Integrity Management, ICSHMIM 2014

作者： Zhang, Wentao Li, Fang Lin, Huang Ce, Bian Xu, Hongbin Du, Yanliang Optoelectronic System Laboratory Institute of Semiconductors Chinese Academy of Sciences Beijing China Graduate School of Shijiazhuang Tiedao University Shijiazhuang China Key Lab of Structure Health Monitoring and Control of Hebei Province Shijiazhuang Tiedao University Shijiazhuang China

ISBN: (纸本)9781138027763

Crack detection is very important for long-term large-scale structural health monitoring (SHM). Fiber optic sensor has been approved to have good performance in application in SHM. In this paper, we present a novel method to monitor the crack by using long-gauge FBG sensor. A FBG with a gauge length of 50 mm is fabricated. When the crack pass through the FBG, the reflect spectrum of FBG will be expanded or chipped. Different position of the crack will result in different shape of the spectrum. By analyzing the characteristics of the spectrum, the position of the crack can be detected and the opening width of the crack can be estimated. © 2015 Taylor & Francis Group, London.

关键词： Structural health monitoring

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