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为实现大跨度桥梁计算分析精细化的要求,在悬索桥结构分析理论的基础上,以普立特大桥为工程实例,建立了悬索桥结构的有限元分析模型,进行了悬索桥主缆线形变化的敏感性参数分析。研究结果表明,温度、塔高及塔偏对主缆跨中标高线形变化非常敏感,主缆钢丝直径、钢箱梁重量和主缆钢丝容重对主缆跨中标高线形变化相对不敏感。在结构有限元模型建模过程中,应对计算模型的参数取值进行修正,以提高有限元模型的计算精度;结构敏感参数分析是结构有限元模型修正的基础,对其进行有效地分析,具有十分重要的意义。
In order to realize the requirement of the refinement of long-span bridge calculation and analysis, on the basis of the structural analysis theory of suspension bridge, the finite element analysis model of the suspension bridge was established based on the example of Purite Bridge, and the sensitivity of the main cable shape change of suspension bridge Parameter analysis. The results show that temperature, tower height and tower deviation are very sensitive to the shape change of the main cable. The diameter of the main cable, the weight of the steel box girder and the cable bulk density of the main cable are relatively insensitive to the height change of the main cable. In the structural finite element model modeling process, the parameters of the calculation model should be modified to improve the calculation precision of the finite element model. The analysis of structural sensitivity parameters is the basis of the structural finite element model amendment. It is analyzed effectively with Very important meaning.