连续刚构桥高墩设计及墩梁结合部应力分析

High Pier Design for Continuous Rigid Frame Bridge and Analysis to Stress at Pier Beam Combining Part

连续刚构桥的桥墩高度和刚度是控制桥梁孔跨布置和结构设计的关键因素。以墩高195 m的赫章特大桥为例,对双薄壁墩、独柱墩2种桥墩形式进行对比分析,得出桥墩采用独柱墩形式的结论。运用大型通用有限元程序ANSYS建立其墩梁结合部局部三维有限元模型,从正应力和主应力角度分析该部位的应力分布特征。分析结果可为同类高墩桥梁设计和施工提供参考。

Height ＆ rigidity of piers in continuous rigid frame bridge is the key factor in control hole spanarrangement of bridges and structural design. This paper takes Hezhang special bridge with 195m highpiers as example, by comparison analysis to two pier types of double thin wall pier and single column pier,to draw the conclusion of adopting single column pier is better. By using Large - scale general finiteelement program ANSYS, this paper sets up a finite element model of its pier beam combination part, so toanalyze the stress distribution features at this area in view of positive stress and main stress angle. Theresult of analysis may provide reference for similar high pier bridge design and construction.