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Temperature Field and Temperature Effect Analysis of Half-through Concrete Filled Steel Tubular Arch Bridge

Author: ZhangHouJu
Tutor: HuDaLin
School: Chang'an University
Course: Bridge and Tunnel Engineering
Keywords: CFT Environmental Factors Temperature field Since the stress Temperature effect
CLC: U448.22
Type: Master's thesis
Year: 2009
Downloads: 130
Quote: 2
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Abstract


This article discusses the place of the natural environment in the arch bridge due to environmental factors ( especially the influence of solar radiation ) , the temperature inside the rib section and a non- uniform distribution of temperature along the longitudinal rib non-uniform distribution . Calculated on the basis of a specific location ( the foot arch , near the bridge of about L / 4 at the Department and the dome ) the cross-section caused by non- uniform temperature distribution of the cross section from the stress , and the uniformity of temperature caused by the temperature drop arch load the effect of the ribs . First, based on the basic principles of heat transfer from the theoretical formula given temperature . Using the existing temperature field calculation method takes into account the natural environment ( particularly solar radiation ) on the surface of the rib section of heat flow analysis and calculation are given concrete section steel temperature field by analytical methods, and then combined with the finite element method for solving the structure temperature field numerical solution and experimental basis , in order to verify the calculation method is feasible. Experiments on steel concrete internal temperature distribution measurements , using general-purpose finite element program for the experimental component calculated results are consistent with the measured values ??to verify the correctness of the calculation method , and this method is applied to calculate the real bridge medium . Selected Chang'an University Pedestrian Bridge basket CFST arch, in typical weather conditions, the specific section of rib surface temperature measurement , combined with the measured results on the rib section of the temperature field calculated the arch specific non-uniform temperature distribution section . On this basis , calculate the rib section by a non- uniform temperature distribution from the stress caused by temperature and cooling ribs in a uniform temperature rise inside the rib loading effects . The results verify the load for the temperature drop of load , the load under adverse effects caused by temperature effects caused by the considerable weight . Through the measured results, the CFST arch bridge of its longitudinal temperature distribution along the bridge is non- uniformly distributed , near the bridge of the rib section of the temperature higher than the temperature of the dome section of about 5 degrees , higher than the arch of the foot section 10 degrees. Thesis concludes temperature field for arch bridge , and temperature effect calculation has some reference value and guiding role.

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CLC: > Transportation > Road transport > Bridges and Culverts > All kinds of bridges > Bridge: Structure > Arch bridge
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