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随着斜拉桥的数量日趋增多,相应的问题也日益严重,在斜拉桥使用寿命增长的同时,也面临着斜拉索更换的问题。目前国内外对人行斜拉桥换索施工控制的研究相对较少,该文依托哈尔滨市一机路彩虹桥换索工程,重点对人行钢箱斜拉桥换索影响因素进行了研究分析,对彩虹桥建立模型,分析温度变化、主梁刚度变化、拉索刚度变化、主梁自重变化、斜拉索张拉力变化等不同施工参数对结构受力的影响,结果表明:斜拉索张拉力的影响最为明显,温度影响较小,但每一施工参数的影响均应考虑。
With the increasing number of cable-stayed bridges, the corresponding problems are also becoming increasingly serious. As the service life of cable-stayed bridges grows, they also face the problem of replacement of stay cables. At present, there are relatively few studies on the construction control of cable-stayed bridge for cable-stayed bridge at home and abroad. Based on the project of Rainbow Bridge Cable-replacement Project of Harbin-Qingdao Highway Cable-stayed Bridge, Rainbow Bridge was established to analyze the influence of different construction parameters such as temperature variation, main girder stiffness variation, cable stiffness variation, main girder self weight change and stay cable tension variation on the structural force. The results show that: The most obvious impact, the impact of temperature is small, but the impact of each construction parameters should be considered.