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Analysis of Temperature Effect of Creep of Concrete Filled Steel Tube Structures

Author: DengSiYi
Tutor: WangYuanFeng
School: Beijing Jiaotong University
Course: Structural Engineering
Keywords: Concrete Filled Steel Tube Creep Temperature Micro - prestressed Arch bridge Coupling
CLC: TU398.9
Type: Master's thesis
Year: 2009
Downloads: 132
Quote: 1
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Abstract


Creep, as an important characteristic of the concrete can be increased deformation of the concrete structure , the internal forces and members of the force structure cross-section stress redistribution , and reduce the carrying capacity of the structure , is a factor to be reckoned with in engineering practice . Temperature, as another important factor to consider in the project can have a significant effect on the creep of concrete performance . Temperature changes , the creep rate will change dramatically . The present research on the creep of concrete effect have already started a lot of research on a new type of steel - concrete composite structures Xu Transition of many . However, based on concrete filled steel tube under the action of temperature creep characteristics very little , just stay in the component level , considering temperature effects of the structure as a whole based on the creep characteristics not been carried out . In this paper , based on micro- prestressed consolidation theory , the establishment of a steel pipe concrete structures considering the temperature effect of creep calculation method were analyzed on the actual concrete filled steel tube arch bridge ( Yajisha ) creep effect . The one hand , the calculation results in comparison with the measured results to verify the correctness of the model and parameter selection ; On the other hand , by comparing the temperature changes and do not consider the temperature change both cases to illustrate the creep analysis considering the temperature necessary sex . The article also detailed analysis of the temperature factors and non- temperature factors for the creep behavior of concrete filled steel tubular structure . Analysis of the temperature factors , the comparative analysis of the 17 ° C , 22 ° C , 27 ° C , 32 ° C , 37 ° C five cases under the creep effect variation ; analysis of the non - temperature factors , a strong focus on the ratio of the steel and the concrete strength two factors ; and also discussed the analysis of the creep effect , the coupling between the temperature factors and non- temperature factors .

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CLC: > Industrial Technology > Building Science > Building structure > Composite structure > Other composite structures
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