斜交预应力混凝土板梁桥的计算模型与试验研究

结合一座斜交角为20°实桥的试验结果,分别利用空间梁格单元模型和空间实体单元模型对该空心板梁桥进行了理论分析,给出了不同截面应力、挠度的对比分析结果。理论分析和试验研究表明:梁格法能较为简便地分析此类桥梁,计算精度接近实体单元模型。并对该类桥梁结构设计中采用何种模型和建模过程中应注意的问题提出了建议。其结论对斜交桥的设计分析具有较为重要的参考价值。

Computation Model and Experimental Study on Skew Prestressed Concrete Plate Beam Bridge

Combined with the result of a bridge with 20°oblique angle test, the author has analyzed the hollow slab girder bridge through 2 models of space grillage analogy unit and space entity unit separately. The analytical result of different section stress and defection are put forward. It shows that grillage analogy method can analyze the type bridge easily and its calculation accuracy closing to entity unit model. Models chosen and some problems occurred in modeling process, which is suggested in this paper. It provides better reference value for the design analysis of skew bridges.