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Temperature Field Observation and Temperature Effect Analysis of Prestressed Concrete Box-girder Bridge

Author: WuJinZuo
Tutor: XieXu
School: Zhejiang University
Course: Bridge and Tunnel Engineering
Keywords: Prestressed concrete box girder bridge Cantilever Construction Temperature field observations Temperature gradient Temperature effect
CLC: U448.35
Type: Master's thesis
Year: 2011
Downloads: 55
Quote: 0
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Abstract


Concrete box girder bridge temperature effects are important factors that affect the safety and durability of the bridge . Temperature loads , the concrete box girder bridge will generate large deformation and stress , especially for cantilever construction bridge , temperature loads relationship to each segment elevation of Elevation bridge state linear impact. The temperature of the concrete box girder problem has a very important significance . Papers on the basis of long-term observation of the temperature field of concrete box girder bridge , explore the bridge concrete box girder distribution of temperature field and temperature effects , to provide advice and reference provisions on the temperature field of concrete box girder bridge specifications for highway bridges . For the object of a large - span concrete continuous rigid frame box girder bridge , embedded temperature sensor through the concrete cross-section , for more than one year continuous observation of the background bridge box girder cross-section of the temperature field and temperature effects . According to the measured data, a detailed analysis of the solar radiation , the cooling natural environment as well as the Four Seasons smooth concrete box girder temperature field variation over time . On the other hand , the paper box girder temperature effect measured : temperature span section of the bridge role stress test for the analysis of box girder temperature field and temperature stress relationship ; cantilever construction status box girder deflection test , with During the analysis of the relationship between the cantilever bending deformation and the temperature gradient . Papers according to the heat conduction principle of finite element method , and the establishment of a two-dimensional analysis of theoretical models , the first boundary condition analysis and calculation of concrete box girder temperature field . The results showed that the concrete box girder is closer to the first boundary condition calculation results with the field . In addition, the paper uses beam element analysis of the theoretical temperature effects , and a comparative analysis with the measured temperature effect discussed the problems of beam element model to simulate the temperature effect .

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CLC: > Transportation > Road transport > Bridges and Culverts > All kinds of bridges > Bridges: the material points > Prestressed concrete bridge
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