Vehicle load identification of long-span bridges based on dynamic image recognition: Theoretical research and application in Sutong Bridge

2014 ◽  
pp. 1017-1020
Author(s):  
A Chen ◽  
Y Pan ◽  
Z Pan ◽  
R Ma
Keyword(s):  
Image Recognition ◽  
Theoretical Research ◽  
Load Identification ◽  
Long Span Bridges ◽  
Dynamic Image ◽  
Long Span ◽  
Vehicle Load ◽  
Sutong Bridge

Vehicle Load Effect of Long-Span Bridges

2015 ◽  
Vol 2481 (1) ◽  
pp. 132-139 ◽  
Author(s):  
Jun Wu ◽  
Fei Yang ◽  
Wanshui Han ◽  
Liujie Wu ◽  
Qiang Xiao ◽  
...  
Keyword(s):  
Load Effect ◽  
Long Span Bridges ◽  
Long Span ◽  
Vehicle Load

Research on Design Vehicle Load for Long-Span Bridges

2011 ◽  
Vol 90-93 ◽  
pp. 909-914
Author(s):  
Da Lin Hu ◽  
Ding Ding ◽  
Long Gang Chen ◽  
Chun Mei Xia
Keyword(s):  
Simulation Analysis ◽  
Extreme Value Distribution ◽  
Bending Moments ◽  
Long Span Bridges ◽  
Long Span ◽  
Vehicle Load ◽  
Long Span Bridge ◽  
Load Effects ◽  
Vehicle Loads ◽  
Characteristic Values

This paper presents simulation analysis of load effects of bridges under random fleet. Based on actual data of vehicle loads on Guangzhou-Shenzhen Expressway and relevant statistical results, mid-span bending moments of long-span virtual simple-supported beams are calculated. Then probability distribution of the bending moments and extreme value distribution of the load effects within design reference period are obtained. Finally, characteristic values of mid-span bending moments and recommended values of design lane load are calculated, sequentially. The results studied in this paper can be as a reference for long-span bridge design, and also can be a reference for overloading control or weight charge policy.

Vehicle Load Spectrum Simulation of Long-Span Bridges

2015 ◽  
Vol 648 ◽  
pp. 35-44 ◽  
Author(s):  
Ting Xia Xu ◽  
Yan Li ◽  
Zhi Wen Wu
Keyword(s):  
Traffic Load ◽  
Load Spectrum ◽  
Characteristic Parameters ◽  
Time Duration ◽  
Long Span Bridges ◽  
Vehicle Type ◽  
Long Span ◽  
Vehicle Load ◽  
Spectrum Simulation ◽  
Load Simulation

Based on the requirement for fatigue damage evaluation of long-span bridges, and existing research literatures, the vehicle type, vehicle weight and time duration are taken as characteristic parameters of random vehicle load. Taking the Second Nanjing Yangtze River Bridge as an example, the characteristics of traffic load are obtained by traffic investigation and the data from existing research results. In the paper the method and process for vehicle load spectrum simulation which includes data acquisition of random traffic load, statistical analysis and Monte Carlo simulation is proposed. The simulation program of random traffic flow is verified using the measured data. The proposed method can provide a reference for random traffic load simulation.

Evolutionary power spectral density analysis on the wind-induced buffeting responses of Sutong Bridge during Typhoon Haikui

2016 ◽  
Vol 20 (2) ◽  
pp. 214-224 ◽  
Author(s):  
Tianyou Tao ◽  
Hao Wang ◽  
Xuhui He ◽  
Aiqun Li
Keyword(s):  
Spectral Density ◽  
Power Spectral Density ◽  
Wavelet Spectrum ◽  
Test Method ◽  
Acceleration Response ◽  
Long Span Bridges ◽  
Long Span ◽  
Power Spectral ◽  
Sutong Bridge ◽  
Main Girder

Recent field measurements on long-span bridges during typhoon events have captured strong nonstationary features in the buffeting responses. In this study, the buffeting responses of Sutong Bridge during Typhoon Haikui in 2012 recorded by structural health monitoring system are analyzed to represent the nonstationary characteristics. As an accurately measured state variable, the acceleration response of the main girder is first selected to evaluate its own original stationarity in different time intervals using the run test method. The acceleration response of the main girder can be regarded as a zero-mean nonstationary random process which is in demand to extract its transient features in time–frequency domain. Hence, the evolutionary power spectral density (EPSD) of the acceleration responses, which can present the local turbulence energy distribution in both frequency and time domains, is estimated using the wavelet-based method. Also, an average wavelet spectrum is obtained by averaging the square values of wavelet coefficients along the time axis, and the comparison between the average wavelet spectrum and Fourier spectrum shows a great conformance which indirectly verifies the validity of the obtained evolutionary power spectral density. The results of this study exhibit that there are strong nonstationary characteristics existing in the buffeting responses of Sutong Bridge during Typhoon Haikui, and it is essential to incorporate the nonstationary features of winds in the analysis or design of long-span bridges from an aerodynamic viewpoint.

Alternate Designs for Long Span Bridges

PCI Journal ◽  
1980 ◽  
Vol 25 (4) ◽  
pp. 48-58
Author(s):  
Felix Kulka
Keyword(s):  
Long Span Bridges ◽  
Long Span

Wind Buffeting in Time Domain Analysis of Long-Span Bridges using RM Bridge

2017 ◽  
Vol 109 (6) ◽  
pp. 3307-3317
Author(s):  
Afshin Hatami ◽  
Rakesh Pathak ◽  
Shri Bhide
Keyword(s):  
Time Domain ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Long Span Bridges ◽  
Long Span
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