邹城市上跨京沪铁路转体斜拉桥桥塔下塔柱选型研究

摘要

For the reason of mechanics behaviors and construction control,single-column pylon instead of double-column pylon is mostly used in the design of rotational cable-stayed bridge.The selection of lower pylon column for rotational cable-stayed bridge with double pylon and double cable plane is necessary as its great influence on the landscape effect and struc-tural safety.This paper took the design of rotational cable-stayed bridge in Zoucheng as background,ANSYS software was used to establish the whole bridge FEMmodel for different lower pylon column types which was respectively inverted trape-zoid and rectangular.A comparative analysis of two types of design schemes for lower pylon column was carried out to deter-mine the rational scheme,and the conclusion could be used as a reference for the design of similar rotational bridge.%基于受力和施工控制方面的原因，转体斜拉桥基本采用独柱式，双柱双索面转体斜拉桥尚无设计先例，双柱双索面转体斜拉桥下塔柱选型对结构安全性和景观性有较大影响，因此开展双塔双索面转体斜拉桥下塔柱选型研究非常有必要。结合山东邹城斜拉桥转体设计方案，采用 ANSYS 软件应用混合有限元方法建立倒梯形和矩形两种下塔柱方案全桥有限元模型，对两种下塔柱方案进行比较分析，确定一种合理的下塔柱方案，为该类转体桥梁设计提供参考。