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Study On Key Technology Of Construction Control Of Concrete Filled Steel Tube Arch Bridge

机译:钢管混凝土拱桥施工控制关键技术研究

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Concrete-filled steel tubular special-shaped tied arch bridge is not only unique in shape, beautiful and generous, but also light in self weight, high in stiffness, with better economy in urban bridge construction gradually favored. As the arch axis is skew curve, the arch rib is more complex in the construction process, so the construction of this type of bridge needs to be monitored scientifically and reasonably, and the influence of different control parameters on the structural stress should be considered to ensure the structural construction safety and construction accuracy. In this paper, the construction monitoring, construction optimization and parameter analysis of Beidahe concrete-filled steel tubular special tied arch bridge in Jiuquan City are carried out. The results show that the stress curve changes in “s” shape when the temperature increases as a whole, and the lower chord steel tube is first tensioned, then compressed and finally tensioned. The stress (tensile stress and compressive stress) of steel tube and concrete will increase with the increase of arch rib concrete capacity, and the stress will decrease with the decrease of capacity. Compared with the stress of steel tube, the change of concrete stress is smaller.
机译:钢管混凝土异形系拱桥不仅造型独特,美观大方,而且自重轻,刚度高,随着城市桥梁建设经济的发展逐渐受到青睐。由于拱轴为偏斜曲线,因此拱肋在施工过程中较为复杂,因此需要科学合理地监测这类桥梁的施工,并应考虑不同控制参数对结构应力的影响。确保结构施工安全和施工精度。本文对酒泉市北大河钢管混凝土专用拱桥进行了施工监测,施工优化和参数分析。结果表明,当温度整体升高时,应力曲线呈“ s”形变化,下弦钢管先被张紧,然后被压缩,最后被张紧。钢管和混凝土的应力(拉应力和压应力)随着拱肋混凝土承载力的增加而增加,应力随着承载力的减小而减小。与钢管的应力相比,混凝土应力的变化较小。

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