Analysis of monitoring data from cable-stayed bridge using sensor fusion techniques

2013 ◽  
Author(s):  
Daniele Zonta ◽  
Federico Bruschetta ◽  
Riccardo Zandonini ◽  
Matteo Pozzi ◽  
Ming Wang ◽  
...  
Keyword(s):  
Sensor Fusion ◽  
Monitoring Data ◽  
Cable Stayed Bridge

Fusion of monitoring data from cable-stayed bridge

2013 ◽  
Author(s):  
F. Bruschetta ◽  
D. Zonta ◽  
C. Cappello ◽  
R. Zandonini ◽  
M. Pozzi ◽  
...  
Keyword(s):  
Monitoring Data ◽  
Cable Stayed Bridge

Safety Monitoring and Evaluation of Construction Projects Based on Multi-sensor Fusion

2020 ◽  
Vol 19 (6) ◽  
pp. 431-441
Author(s):  
Na Ni
Keyword(s):  
Missing Data ◽  
Monitoring System ◽  
Sensor Fusion ◽  
Construction Projects ◽  
Monitoring Network ◽  
Safety Monitoring ◽  
Monitoring And Evaluation ◽  
Construction Safety ◽  
Monitoring Data ◽  
Safety Monitoring System

For most construction projects, the complex engineering environment, the backward data collection technology, and the unreasonable monitoring network have resulted in many problems in monitoring data such as lots of noise and missing data items, therefore, it is of great significance to study the safety monitoring system of construction projects based on wireless sensor network (WSN). For this reason, this paper proposed a construction safety monitoring and evaluation (CSME) model based on multi-sensor fusion. First, the system structure and data flow model of the construction safety monitoring system were constructed; then, combining with a multi-sensor deep fusion system which was built on physical and information systems, this paper designed a spectrum sensing algorithm for sensor signals within the construction area. After that, tempo-spatial correlation analysis was conducted on the monitoring data, and a multi-sensor monitoring network joint sparse (MSMN-JS) model was constructed, which realized reconstruction of missing data items. At last, this paper used experimental results to prove the application value of the algorithm model to the safety monitoring and evaluation of construction projects.

Monitored structural behavior of a long span cable-stayed bridge under environmental effects

2018 ◽  
Vol 4 (4) ◽  
pp. 137 ◽  
Author(s):  
Alemdar Bayraktar ◽  
Ashraf Ashour ◽  
Halil Karadeniz ◽  
Altok Kurşun ◽  
Arif Erdiş
Keyword(s):  
Air Temperature ◽  
Environmental Effects ◽  
Monitoring Data ◽  
Structural Behavior ◽  
Steel Cable ◽  
Daily Monitoring ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Cable Forces ◽  
Cable Stayed Bridges

An accurate numerical analysis of the behavior of long-span cable-stayed bridges under environmental effects is a challenge because of complex, uncertain and varying environmental meteorology. This study aims to investigate in-situ experimental structural behavior of long-span steel cable-stayed bridges under environmental effects such as air temperature and wind using the monitoring data. Nissibi cable-stayed bridge with total length of 610m constructed in the city of Adıyaman, Turkey, in 2015 is chosen for this purpose. Structural behaviors of the main structural elements including deck, towers (pylons) and cables of the selected long span cable-stayed bridge under environmental effects such as air temperature and wind are investigated by using daily monitoring data. The daily variations of cable forces, cable accelerations, pylon accelerations and deck accelerations with air temperature and wind speed are compared using the hottest summer (July 31, 2015) and the coldest winter (January 1, 2016) days data.

scholarly journals Overview of integrated health monitoring system installed on cable-stayed bridge and preliminary analysis of results

2021 ◽  
Vol 73 (06) ◽  
pp. 591-604
Keyword(s):  
Monitoring System ◽  
Data Storage ◽  
Health Monitoring ◽  
Yangtze River ◽  
Structural Damage ◽  
Monitoring Data ◽  
Extreme Condition ◽  
Health Monitoring System ◽  
Cable Stayed Bridge ◽  
Integrated Health

The Junshan Yangtze River Bridge, built in Wuhan, China in 2001, is a steel box girder cable-stayed bridge with a main span of 460m. Due to decades of service, the bridge suffered gradual degradation and some damage. Structural health monitoring has attracted worldwide attention due to its capacity of monitoring structural damage, assisting maintenance and management, and ensuring safe operation of bridges. To monitor the performance status of bridges and generate a timely safety alarm, an integrated health monitoring system has been designed and implemented on bridges. This paper provides a thorough account of the monitoring system used at the Junshan Yangtze River Bridge. It mainly focuses on the selection of monitoring variables and arrangement of sensor points, the data collection and transmission system, the data storage and management strategy, and the user interface system. All kinds of monitoring data collected under daily operation, such as vehicle load, deflection, displacement, and cable tension, are analysed. Monitoring data for an extreme condition, which involves two heavy trucks of 178 tons moving across the bridge, are also analysed. The results indicate that the monitoring system works well and that some local welded joints may experience fatigue damage.

The Correlative Analysis of Temperature and Stress Based on Monitoring Data on the Cable-Stayed Bridge

2012 ◽  
Vol 256-259 ◽  
pp. 1509-1514
Author(s):  
Xiu Yong Wang ◽  
Wang Long Lei ◽  
Yi Yang ◽  
Qi Yang ◽  
Hong Xin Sun
Keyword(s):  
Least Square Method ◽  
Least Square ◽  
Monitoring Data ◽  
Effect Of Temperature ◽  
Bridge Health Monitoring ◽  
Correlative Analysis ◽  
Cable Stayed Bridge ◽  
Condition Evaluation ◽  
Relative Value ◽  
Strong Linear Correlation

Based on the monitoring data of Jiujiang Bridge Health Monitoring System, the relation of the temperature and girder stress for the concrete cable-stayed bridge is analyzed. Firstly, taking the acquired stress and the corresponding temperature data for one month as analyzing samples, the daily mean of stress and temperature is calculated with all 72 sets of everyday data, and the relative value of stress and temperature is obtained by the comparison of the reference day. Result shows a strong linear correlation between stress and temperature. The trend equation between temperature and stress is then fitted by the least square method. Finally, the effect of temperature for girder stress have eliminated with the trend equation and the safety threshold of condition evaluation for the girder is set by probability statistics theory.

Effect of solar temperature field on a sea-crossing cable-stayed bridge tower

2019 ◽  
Vol 22 (8) ◽  
pp. 1867-1877 ◽  
Author(s):  
Yuan Li ◽  
Shuanhai He ◽  
Peng Liu
Keyword(s):  
Temperature Field ◽  
Elevation Angle ◽  
Monitoring Data ◽  
Heat Transfer Analysis ◽  
Radiation Absorption ◽  
Temperature Deformation ◽  
Transient Temperature ◽  
Field Calculation ◽  
Cable Stayed Bridge ◽  
Bridge Tower

Based on the transient temperature field theory of heat conduction, the solar temperature field calculation model of a sea-cross cable-stayed bridge tower was established and calculated through transient heat transfer analysis, with the largest sea-cross construction project of Kong–Zhuhai–Macao Bridge as an example. The main parameters, including the solar elevation angle, azimuth angle, radiation absorption coefficient, and length of overhang, were incorporated. The proposed model was verified by comparing the measured data with the predicted values of both the temperature field and temperature deformation. The analysis results and monitoring data achieved a good agreement, which reveals that integrating numerical analysis with field monitoring data can be utilized to thoroughly understand the effects of a solar temperature field on a sea-crossing cable-stayed bridge tower. The research results guide the construction of the bridge.

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