特大跨钢筋混凝土拱桥静风稳定性影响因素分析

Analysis of Influencing Factors on Static Wind Stability of Super-large Span Reinforced Concrete Arch Bridge

特大跨度钢筋混凝土拱桥静风稳定性研究近年来逐渐成为国内外学者研究的热点。文章试设计600m跨钢筋混凝土拱桥,利用ANSYS有限元分析软件建立模型,通过施加风荷载,计算结构在荷载作用下响应,得出不同初始风攻角下拱桥的静风失稳临界风速,分析初始风攻角因素对静风失稳的影响程度;采用因素分析法分析三分力系数中各系数在不同情况下拱桥的变形,探讨三分力系数对结构静风稳定性的影响。

The static wind stability study of super-large span reinforced concrete arch bridge has become a hot topic for domestic and foreign scholars in recent years.This article conducted the trial design of 600m-span reinforced concrete arch bridge and established the model by ANSYS finite element analysis software,then through applying the wind load, it calculated the structure response under the load action, obtained the critical wind speed of arch bridge under different initial wind attack angles,and analyzed the influence degree of initial wind attach angle on the static wind instability; it also used the factor analysis method to analyze the arch bridge deformation under different coefficient conditions in aerodynamic coefficient, and discussed the influence of aerodynamic coefficients on the static wind stability of structure.