安溪铭选大桥侧向稳定分析

结合福建省安溪铭选大桥的设计，利用钢管砼的本构关系，并考虑了变形的几何非线性对大跨径钢管砼肋拱桥的内力和侧向稳定性做了研究．运用编制的有限元程序对施工和运营工况进行分析且与当量压杆法进行了比较，并提出了几点看法，可供实际工程借鉴，也为《桥规》在侧向稳定计算方面的补充修改提供参考

Grillage Analytical Method of Closed Cercular Beam-and-Slab Bridge

Based on grillage analysis which represents the bridge deck by an equivalent grillage of beams, the structural response of closed circular beam-and-slab bridge is investigated in this paper. In order to demonstrate the accurancy and feasibility of this method, the finite element analysis with combination of beam elements and triangular plate-bending elements is performed. Also, experimental test is carried out on the plexiglass perspex model, which was a 1:40 scale replica of main project of Zhiyang Viaduct at Fuzhou. Results obtained by grillage analysis agree well with both experimental data and finite element numerical values. The agreement indicates the adequacy of grillage analytical method for the assessment of the structural response of bridge of this type.