Exhibition Island Planning Second Road Bridge is an important transportation artery around Exhibition Island in Cangshan Dis-trict,Fuzhou.Based on the terrain and geological conditions,three kinds of bridge typehave been proposed,including arch beam composite bridge,variable cross-section continuous steel box girder bridge,and mid through tied arch bridge.By comparing the bridge landscape,en-gineering cost,construction difficulty,and construction period,arch beam composite bridge with partially thrust system were finally deter-mined,and key technologies such as arch foot thrust and arch beam stiffness ratio were analyzed.Research has shown that some thrust sys-tems can effectively reduce the horizontal thrust at the arch foot,and the influence of the arch beam stiffness ratio on the bending moment at the arch foot is greater than that at the mid span arch crown.By selecting the appropriate stress system and arch beam stiffness ratio,the construction of the bridge can achieve good technical,economic,and social effects.
关键词
桥型方案比选/部分有推力体系/拱脚推力/拱梁刚度比
Key words
Comparison and selection of bridge type schemes/Partial thrust system/Thrust at arch feet/Arch beam stiffness ratio
维普
万方数据