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Analysis of Structure Simulation for Long-span Prestressed Concrete Continuous Rigid-frame Bridge
Author: OuYangJian
Tutor: XiongJinGang;WuBaoShi
School: Nanchang University
Course: Architecture and Civil Engineering
Keywords: Long-span continuous rigid frame bridge The Taihe Gan River Bridge Structural Analysis Seismic analysis Inter - down deflection Measures CONSTRUCTION MONITORING AND CONTROL
CLC: U448.23
Type: Master's thesis
Year: 2010
Downloads: 121
Quote: 0
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Abstract
Prestressed concrete continuous rigid frame bridge due to its ability to leap, driving comfort, more reasonable structural material characteristics in long-span beam bridge attracted more attention. This paper first reviews the continuous rigid frame bridge in the history of the development, construction technology, structural characteristics and development trend of continuous rigid frame bridge construction control methods of analysis and significance are described. The continuous rigid frame system is a complex space force system, usually using the finite element method analysis. In this paper, through the establishment of reasonable finite element analysis model, the use of flat bar finite element program, structural simulation analysis the Taihe Gan River Bridge. Analysis of prestressed concrete rigid frame bridge construction process simulation, calculation of the structure of the construction process by force, deformation and formwork elevation control value for the bridge construction monitoring provides a set of theoretical data, the correct guidance of construction, to ensure that the bridge monitoring the smooth implementation. Is a very serious destructive earthquake disasters, special structures to take certain seismic measures is very important. The Taihe Gan River Bridge seismic made a specific calculation and analysis, using the subspace iteration method for the momentum eigenvalue analysis and response spectrum vibration analysis, results show that the structure of the system is stable. A number of domestic and international long-span prestressed concrete continuous rigid frame bridge (especially the main span of more than 150 meters) emerged as the major disease is one of the main cross beam under torsion. To extend the service life of the bridge, under the bridge across the medium-and long-term flexible cause analysis, proposed a \the introduction of in vitro beam measures to reduce the operational phase of the live load and post-concrete shrinkage and creep deflection. Large-span continuous rigid frame bridge is often used cantilever cast-in-place construction method, linear bridge in the construction process is subject to many uncertainties determined, such as the design calculation model, the physical and mechanical properties of the materials, construction precision, construction loads, atmospheric temperature and the like, there is always a difference between the ideal state and the actual state. By displacement of the main pier of the bridge during construction (vertical degrees) and Pier settlement, the main beam stress with linear, pre-stressed concrete structure stress-strain and construction temperature-site monitoring and surveillance, monitoring results show that the construction process by force and displacement state is always in a safe and controllable state, construction control to achieve the desired requirements.
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CLC: > Transportation > Road transport > Bridges and Culverts > All kinds of bridges > Bridge: Structure > Rigid Frame Bridge
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