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以一座钢管混凝土刚架系杆拱桥设计为工程背景,通过在Ansys程序中建立有限元模型进行静力分析,并根据分析结果确定了刚架系杆拱在施工过程中各阶段的系杆设计张拉力,并对不同拱轴系数的拱肋内力进行对比分析,确定了拱肋的合理拱轴线,从而确定了拱肋的设计线形,在文章的最后根据应力叠加法原理对拱肋进行了应力验算。
Based on the design of a concrete-filled steel tubular tied-arch bridge, the finite element model was established in the Ansys program for static analysis. According to the analysis results, the tie rod design of the frame-type tie-rod arch at various stages of construction was determined And the internal forces of arch ribs with different arch coefficients are compared and analyzed, the reasonable arch axis of the arch ribs is determined, and the design line shape of the arch ribs is determined. At the end of the article, the stress calculation of the arch ribs is carried out according to the stress superposition method .