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Temperature Effect Analysis of Steel-Box Concrete Composite Arched
Bridge in Construction Process
Han Hui, Lv Na, Zhou Zhixiang, Zhang Jin
2014, 33(6):
27-33.
DOI: 10.3969/j.issn.1674-0696.2014.06.07
In the construction process, the stress and deformation effects of steel-box concrete composite arched bridge under the overall temperature change and
sunlight temperature change cannot be neglected. Taken the Sunxi River bridge in Jiangjin as a study object, construction steel box stress, structural deformation and
temperature distribution under the overall temperature change and sunlight temperature change were in-depth studied. The results show that the overall effect of
temperature change under stress and deformation increases with temperature. At the empty steel box stage the most unfavorable position locates at the foot arch, and
the maximum stress increments up to 40 MPa. At the main arch forming stage the most unfavorable position is at the main arch 3/8L, and the maximum stress increments up
to 25 MPa. Under the influence of sunshine, due to internal heat conduction concrete, the temperature and stress of steel-box and concrete relatively uniform; the
steel tank temperature substantially equals on both sides; the top and bottom edge of the steel box have a certain temperature difference.
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