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张弦粱结构中的找形分析是指给定结构设计状态几何,求解结构施工放样状态下的几何,目前常采用“逆迭代”方法进行分析计算,但该方法迭代次数较多,效率不高。因此,本文尝试将悬索桥分析设计中常用的“节线法”引入到张弦梁结构找形分析中来,详细阐述了该方法的原理及实现流程,并通过midas Gen对某张弦梁结构进行了验证,结果表明,通过“节线法”计算出来的结果所产生的主梁及拉索变形均满足要求,证明该方法可行,具有一定推广价值。
The form-finding analysis in the string structure refers to the geometry of a given structural design state, and the geometries under the condition of construction loft are solved. At present, the “inverse iteration” method is often used to analyze and calculate. However, this method has many iterations and the efficiency not tall. Therefore, this paper attempts to introduce the “nodal method” commonly used in suspension bridge analysis design into the form finding analysis of the beam string structure. The principle of the method and its implementation process are expounded in detail. A string structure is verified by midas Gen The results show that the deformation of main girder and cable produced by the result of “section method” meets the requirements, which proves that this method is feasible and has some generalized value.