考虑吊杆损伤的拱桥稳定性分析

以郑州黄河公路二桥主桥———下承式钢管混凝土拱桥为研究对象,根据该桥梁的结构特征,采用ANSYS有限元程序,建立了桥梁的空间有限元计算模型,计算了桥梁的空间稳定性,给出了桥梁的稳定安全系数,探讨了拱桥吊杆损伤对桥梁空间稳定性的影响。计算结果表明,该下承式钢管混凝土拱桥吊杆损伤对桥梁的低阶稳定安全系数影响较小。

Analysis of Arch Bridge Stability Affected by Damages in Suspenders

In this paper,the main bridge of the Second Huanghe River Highway Bridge in Zhengzhou,a concrete-filled steel tube through arch bridge is taken as the research object.In the light of the structural features of the bridge,the finite element program ANSYS is used to set up a three-dimensional finite element calculation model for the bridge,the three-dimensional stability of the bridge is then calculated and safety coefficients of the stability are given,and at the same time the influences from damages in the suspenders on the stability are discussed.The results of the calculation show that the damages in the suspenders of the bridge have slight influences on the low-order stability safety coefficients.