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Analysis of Cable-stayed Bridge on Construction Control with Three-Dimension Model

Author: LiKeYin
Tutor: YangJiXin
School: Wuhan University of Technology
Course: Road and Railway Engineering
Keywords: Cable-stayed bridge Space model Static Dynamic characteristics Comparative analysis
CLC: U445
Type: Master's thesis
Year: 2005
Downloads: 306
Quote: 3
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Abstract


The cable-stayed bridge is closely related to the high statically indeterminate structure, the structure of the internal forces and linear construction structure system and load changes. With the development of science and technology, the cable-stayed bridge span is increasing, more compact structure and its attendant increase the difficulty of construction, the construction cycle becomes longer, lead to the construction of the bridge will inevitably experienced the summers easy Festival, as well as earthquakes, wind and other construction loads of incentive. Therefore, select the appropriate monitoring system in the construction to control engineering critical to the success of its structure, and the structure of static and dynamic checking is the core work in the construction control. This paper studies the characteristics of the existing construction control method, a cable-stayed bridge specialized monitoring systems. Also explained the need for the cable-stayed bridge construction in the state structure analysis using the three-dimensional model for the simulation analysis, as well as the various components of the equivalent simulation method, and the equivalent loads of different construction conditions in the three-dimensional model using the node. The first of the Three Gorges Reservoir Area high and low tower cable-stayed bridge (the Yangtze River Highway Bridge) to the background, respectively, to establish space model and a flat-screen model, the static calculation and analysis of the deformation, internal forces, stress and cable force calculate the difference between the results of each segment and a segment of the same conditions in the variation of different operating conditions, as well as two models provides a suitable model for practical engineering analysis. At the same time, in view of the static analysis, the Sunshine Thermal structure has been the status of troubled people, raised should be used according to the actual situation in the actual construction of the point of view of the different methods to calculate the structure of the temperature field and the calculation formulas are, at the same time through space model the impact of the the largest cantilever state of main beam temperature is calculated and compared with the measured data analysis to verify the reliability of this method. At the same time, the study of the overall characteristics of the cable-stayed bridge dynamic characteristics and dynamic analysis of the content and difficulty of the cable-stayed bridge with finite element analysis. Yangtze River Highway Bridge, dynamic analysis of three-dimensional space model, the dynamic characteristics of the structure under different construction state, according to the modes and frequency to study the ideas of its advantages as well as the optimization of the design aspects of this type of bridge. The comparative analysis of several model calculations, the bridge construction state vibration characteristics of the structure, as well as in response to different excitation. And deduce the results of the analysis to the differences of the Bridge state the dynamic characteristics of the structural system, the different components of the bridge, in order to provide reference for the same type of bridge.

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CLC: > Transportation > Road transport > Bridges and Culverts > Bridge Construction
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