基于抗倾覆稳定性分析的桥梁结构设计研究

Research on Bridge Structural Design Based on Anti-Overturning Stability Analysis

探究影响桥梁上部结构横桥向抗倾覆稳定性的主要因素,主要有偏心汽车荷载、横向支座间距、桥梁边中跨跨径比、桥梁平曲线半径、支座类型等;对桥梁上部结构横桥向倾覆失稳模态和抗倾覆稳定性计算原理进行深入的剖析,进而提出增大横桥向支座间距、优化桥梁孔跨布置、优化桥梁平曲线半径、控制汽车荷载分布等提高桥梁抗倾覆稳定性的具体措施,对保证桥梁上部结构抗倾覆稳定性、安全性与可靠性有重大意义。

In this article,the main factors affecting the transverse anti-overturning stability of the bridge superstruc-ture are explored,mainly including eccentric vehicle load,transverse support spacing,bridge sidespan-to-midspan span ratio,bridge horizontal curve radius,and support type.It analyzes the instability mode and anti-overturning stability calculation principle of the transverse bridge superstructure,and then proposes specific measures to improve the anti-overturning stability of the bridge,such as increasing the spacing of the transverse bridge supports,optimiz-ing the layout of the bridge hole span,optimizing the bridge horizontal curve radius,and controlling the load distri-bution of automobiles,which is of great significance to ensure the anti-overturning stability,safety and reliability of the bridge superstructure.