高墩大跨连续刚构桥及其双肢薄壁高墩计算分析

Calculation Analysis of High-pier Large-span Continuous Rigid Frame Bridge and Its Double-limb Thin-wall High Pier

该文结合山区、黄土地区合理桥型的选择,收集了国内外具代表性的高墩大跨连续刚构桥下部结构的数据资料,提出了双肢薄壁墩刚度更精确的计算图式,推导了计入几何非线性的墩顶水平位移计算公式、墩身合理刚度,并讨论了双肢中距与稳定性的关系。

Combined with the choice of the reasonable bridge type in the mountain areas and loess regions,the article collects the data and materials representing the substructure of the high-pier large-span continuous rigid frame bridge at home and abroad,puts forward the more accurate calcu- lating chart of the rigidity for the double-limb thin-wall pier,derives the horizontal displacement cal- culating formula of the pier top metered with geometric nonlinearity and the reasonable rigidity of the pier body,and discusses the relation of the double-limb centre distance with the stability.