小宽跨比空钢管系杆拱桥稳定性研究

The Research Of Hollow Steel- tube Arch Bridge With Small Radio Of Width To Span About Stability

为了研究小宽跨比空钢管系杆拱桥的稳定性,以漳平粉煤灰综合利用项目跨河桥梁工程为背景,采用有限元软件ANSYS建立拱桥三维模型。通过有限元软件分析该桥在正常使用以及偏载和检修荷载等几种不同工况下的屈曲形状和荷载屈曲系数来研究其稳定性,结果表明:该桥的面外刚度偏弱,容易发生面外失稳。

In order to study the stability of the hollow steel - tube arch bridge with small radio of width to span to Zhangping fly ash utilization projects crossing bridge project as the background, using the finite element software ANSYS to establish Arch 3D models. Through the finite element software to analyze the buckling shape and buckling load coefficient of different conditions about normal load, partial load and maintenance of the bridge to research the stability, results show that the stiffness of the outer surface of the bridge is too small, prone to surface external instability.