230m网状吊杆组合梁拱桥设计分析

Design and Analysis of 230-m Mesh Suspender Composite Girder Arch Bridge

深汕大桥为主跨230 m网状吊杆钢混组合梁拱桥,主梁采用钢-混组合脊骨梁断面,全宽56 m,大挑臂长18 m;主拱采用二次抛物线拱轴线,六边形截面,拱高41.273 m,矢跨比为1/5.5。大桥为网状吊杆在市政超宽桥面桥梁中的首次尝试运用,对拱轴线、矢跨比、拱截面形式、拱高、拱倾角、风撑设置、吊杆间距、主梁形式等参数进行了比选分析。

Shenshan Bridge is a mesh suspender steel-concrete composite girder arch bridge with the main span 230 m.The main girder adopts the steel-concrete composite spine girder section.Its total width is 56 m and its long cantilever arm is 18 m.The main arch adopts the secondary parabola arch with the hexagon section.Its arch height is 41.273 m and its rise span ratio is 1/5.5.The mesh suspender of bridge is the first attempt to use in the municipal super-wide deck bridge.The parameters of arch axis,rise span ratio,arch section form,arch height,arch dip angle,wind bracing setting,suspender spacing and main girder form are compared and analyzed.The relevant research and design results can provide reference for the design of the similar bridges in the future.