摘要
闽候新南港大桥主桥设计为70 m+4×120 m+70 m连续梁桥,桥址处自然条件复杂。为确保该桥施工和建成运营后的抗风稳定性及安全性,对桥梁主桥结构动力特性、最大悬臂阶段和成桥阶段进行了分析。计算结果表明:最大悬臂阶段结构稳定性最差,对结构稳定性起控制作用的是恒载,活载、风荷载等对桥梁最大悬臂状态的稳定影响不大。该计算结果为大桥的设计和施工提供了理论依据。
The main bridge of New South Harbor Bridge in Minhou County is designed as a 70 m+4×120 m+70m continuous-beam bridge.The natural conditions are complicated at the bridge site.In order to ensure the anti-wind stability and safety of this bridge in the construction and operation stages,the article analyzes the dynamic characteristics of the main bridge,the longest cantilever construction stage and the bridge completion stage.The results show that the structure stability of the longest cantilever stage is the worst,the constant load plays the control role on the structure stability,and the influence of living load and wind load on the stability of the longest cantilever state of bridge is not greater,which provide the theoretical basis for the design and construction of the similar bridges.
出处
《城市道桥与防洪》
2017年第4期88-90,共3页
Urban Roads Bridges & Flood Control
关键词
大跨度
长连续梁桥
稳定性
分析
long span
long continuous beam bridge
stability
analysis
