外倾式蝴蝶拱桥拱肋参数影响研究  

Research on the Influence of Arch Rib Parameters on Externally Inclined Butterfly Arch Bridge

作　　者：晏乐群 彭世超 Yan Lequn;Peng Shichao(North China Municipal Engineering Design&Research Institute Co.,Ltd.,Tianjin 300074,China)

机构地区：[1]中国市政工程华北设计研究总院有限公司,天津300074

出　　处：《特种结构》2024年第1期97-102,共6页Special Structures

摘　　要：外倾式蝴蝶拱桥两片拱肋向外倾斜,造型美观,在中小跨径城市景观桥梁中具有一定竞争力。此类桥梁拱肋横向距离过大,无法设置风撑,容易面外失稳。同时拱肋产生面外弯矩,处于双向受弯状态。本文以某上跨高速公路车行外倾拱桥为研究对象,建立空间有限元模型,研究拱肋倾角和拱肋刚度等参数对结构受力性能的影响,得出最优拱肋倾角及刚度。The externally inclined butterfly arch bridges with two outward inclined arch ribs have certain competitiveness in small to medium-sized urban landscape bridges,because of its beautiful appearance.The lat-eral distance between the two arch ribs of such bridges is too long to set wind braces,and prone to instability outside the plane.At the same time,the arch ribs withstand an out of plane bending moment which results in a bi-directional bending state.Based on the vehicle overturned externally inclined arch bridge on an overpass highway as the research object,the spatial finite element model was established.The influence of parameters such as arch rib inclination angle and stiffness on the structural performance was studied,and the optimal arch rib inclination angle and stiffness were proposed.

关 键 词：外倾蝴蝶拱桥 有限元模型 受力性能 参数影响 

分 类 号：TU997[建筑科学—市政工程]