Abstract
This paper studies the alignment of bridge, the vertical displacement of the pier, the offset of the tower, the deformation of the expansion joints and cable force based on an extra large span cable-stayed bridge in Chongqing. Secondly, the contents and methods of large span cable-stayed bridge monitoring were introduced. Then, the theoretical value related to deformation of the bridge is calculated by using finite element software. After that, the bridge deformation data on the site was measured. Finally, the bridge alignment, tower vertical displacement, tower deformation, expansion joints, tower of the measured values and the theoretical calculation values were analyzed on the basis of comparison. It is concluded that the bridge is in normal working condition. The analysis and research of large span bridge in this paper provides the basis for similar Bridges, which has good practical value.
Highlights
With the rapid development of China’s economic, the bridge spans increase day by day
This paper studies the alignment of bridge, the vertical displacement of the pier, the offset of the tower, the deformation of the expansion joints and cable force based on an extra large span cable-stayed bridge in Chongqing
Monitoring Results and Analysis 4.1 Theoretical Calculation of Deformation Monitoring According to the material parameters and usage of the bridge, using the FEA software calculates the theoretical value of the bridge deformation
Summary
With the rapid development of China’s economic, the bridge spans increase day by day. The cable-stayed bridge is one of popular styles of the long-span bridges. Compared with the suspension bridge, cable-stayed bridge is preferable in rigidity, economy, wind resistant stability, erection and so on (Zhou, 2004). Factors, such as the heavy car traffic volume, destructive effects of overload and overweight vehicles, natural ageing of structures and materials cause large deformation of bridge structures. Based on a long-span cable-stayed bridge, this paper analyzed the monitoring deformation value by finite element analysis software. The analysis of the long-span cable-stayed bridge deformation monitoring can provide a certain basis for similar bridge deformation monitoring and has good popularization value
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