钢—混凝土组合连续梁—V腿连续刚构桥受力性能的影响因素分析

Analysis of Influencing Factors on Mechanical Performance of Continuous Beam-V-leg Rigid Frame Bridge with Steel-concrete Composite Girder

钢—混凝土组合连续梁—V腿连续刚构桥是主梁结构采用钢—混凝土组合梁,由V形墩连续刚构桥和连续梁组合形成的新型桥梁结构。它既有组合连续梁的受力特征,又有V腿刚构桥的受力特征,同时主梁还是钢—混凝土组合梁。V腿与主梁固结,V腿的性能会影响上部结构的性能。针对国内首座钢—混凝土组合连续梁—V腿连续刚构桥的结构特点,研究了预压配重大小、V腿角度、V腿支架拆除时机等因素对结构受力的影响,并提出合理的优化建议。

Steel-concrete composite continuous beam V-leg continuous rigid frame bridge is a new type of bridge structure composed of V-shaped pier continuous rigid frame bridge and continuous beam, which not only has the mechanical characteristics of composite continuous beam, but also has the mechanical characteristics of V-leg rigid frame bridge. At the same time, the main beam is also steel-concrete composite beam. However, the research on this new structure is relatively less. There are many researches on the mechanical properties of composite continuous beam bridge after the combination of steel girder and concrete deck, but most of these discussions are based on the situation that the substructure is vertical pier and the pier beam is not consolidated. When the V-leg is consolidated with the main beam, the performance of the V-leg will affect the performance of the superstructure. According to the structural characteristics of the first steel-concrete composite continuous beam-V-leg continuous rigid frame bridge in China, in the paper the influence of preloading counterweight size, V-leg angle, V-leg bracket removal time and other factors on the structural stress is studied, and reasonable optimization suggestions are put forward.