动态无应力构形有限元及钢筋混凝土拱桥负角度竖转施工控制研究.docx

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【Abstract】With the rapid development of infrastructure construction, the construction of large-scale steel-concrete composite arch bridges has become more common. However, the construction of these bridges often faces challenges such as dynamic stress-strain behavior and negative angle vertical rotation during the construction process. In this study, a finite element model of a dynamic stress-free configuration was established to investigate the construction control of steel-concrete composite arch bridges with negative angle vertical rotation. The results provide valuable guidance for the safe and efficient construction of these bridges.
【Keywords】dynamic stress-free configuration; finite element analysis; steel-concrete composite arch bridge; negative angle vertical rotation; construction control
1. Introduction
Steel-concrete composite arch bridges are widely used due to their excellent structural performance and aesthetic value. During the construction process of these bridges, the dynamic stress-strain behavior and negative angle vertical rotation often affect the construction control. To ensure the safe and efficient construction of steel-concrete composite arch bridges, it is necessary to study the construction control under these circumstances.
2. Dynamic Stress-Free Configuration Finite Element Model
A dynamic stress-free configuration finite element model was established using advanced computer software. The material properties of the steel and concrete were defined based on experimental data. The bridge geometry, including the arch span, height, and thickness, was set according to the actual design. The model was then subjected to various loading conditions to simulate the dynamic behavior during construction.
3. Analysis of Steel-Concrete Composite Arch Bridge with Negative Angle Vertical Rotation
The construction control of steel-concrete composite arch bridges with negative angle vertical rotation was investigated. The effects of different construction parameters, such as arch span, height, and thickness, on the negative angle vertical rotation were analyzed. The results showed that the negative angle vertical rotation can be effectively controlled by adjusting the construction parameters.
4. Construction Control Measures
Based on the analysis results, several construction control measures were proposed. First, the arch span and height should be properly designed to minimize the negative angle vertical rotation. Second, the construction sequence and loading conditions should be carefully planned to avoid excessive stresses and deformations. Third, monitoring and feedback mechanisms should be implemented to continuously assess the construction progress and adjust the control measures if necessary.
5. Case Study
A case study of a steel-concrete composite arch bridge construction was conducted to verify the effectiveness of the proposed construction control measures. The actual construction process was simulated using the established finite element model. The results showed that the construction control measures successfully controlled the negative angle vertical rotation and ensured the safety and stability of the bridge during construction.
6. Conclusion
This study investigated the construction control of steel-concrete composite arch bridges with negative angle vertical rotation. A dynamic stress-free configuration finite element model was established, and the effects of different construction parameters on the negative angle vertical rotation were analyzed. Based on the analysis results, construction control measures were proposed and verified through a case study. The results provide valuable guidance for the safe and efficient construction of steel-concrete composite arch bridges with negative angle vertical rotation.
In conclusion, the study of dynamic stress-strain behavior and negative angle vertical rotation in the construction of steel-concrete composite arch bridges is crucial to ensure the safety and stability of these structures. Further research should focus on optimizing the construction control measures and exploring new construction methods to improve the efficiency and performance of steel-concrete composite arch bridge construction.