基于稳定性的高墩大跨连续刚构桥极限墩高研究

Study on Ultimate Pier Height of Long-span Continuous Rigid Frame Bridge Based on Stability

以湖北龙潭河大桥高墩结构形式为基本模式,利用大型空间有限元软件ANSYS建立数值模型,研究在确定的截面形式、结构参数和稳定安全储备条件下,高墩大跨连续刚构桥可能达到的极限墩高,并研究结构几何参数、材料参数、初始几何缺陷及风荷载等因素对极限墩高的影响程度。研究结果显示:采用龙潭河大桥高墩结构形式,连续刚构桥可以达到的极限墩高约为205 m。增大极限墩高的途径也在文中进行了探讨。

On the basis of the pier structure of Longtanhe Bridge in Hubei, establishing numerical model with ANSYS, the ultimate pier height of Long-span continuous rigid frame bridge with high pier is discussed in this paper on the condition of certain section form, structural parameters and stability. The result shows that the ultimate pier height of continuous rigid frame bridge is about 205 m using the pier structure of Longtanhe Bridge. The ways to enhance the ultimate pier height are also discussed.