索对斜拉拱桥横向静风稳定性的影响-《郑州大学学报(工学版)》

文章信息/Info

Title:: Effect of Cable on the Lateral Stability Caused by Static—-Wind Loadof Cable--Stayed Arch Bridge

作者:: 钱雪松; 胡兆同; 李加武.; 长安大学,桥梁与隧道陕西省重点实验室,陕西,西安,710064, 长安大学,桥梁与隧道陕西省重点实验室,陕西,西安,710064, 长安大学,桥梁与隧道陕西省重点实验室,陕西,西安,710064

Author(s):: QIAN Xuesong; HU Zhaotong; LI Jiawu; Key Laboratory for Bridge and Tunnel of Shanxi Province，Chang’an University，Xi’an 710064，China

Keywords:: cable—stayed arch bridge; lateral instability; static—wind load; buckling fo

摘要:: 应用有限元软件ANSYS对斜拉拱桥在静风荷载作用下的面外稳定问题进行研究,考虑不同索预张力、索塔高度、索距及拉索布置位置等参数下索对斜拉拱桥横向静风稳定性的影响.结果表明:拉索可以有效控制结构的面外失稳形式,斜拉拱桥具有较高的横向抗风稳定性能;增大索预张力、增高索塔及减小索距都能改善结构横向静风稳定性能,且塔高影响最显著,增高索塔甚至能使横向静风稳定性能提高近一倍;拉索布置位置对横向静风稳定性能有明显影响,且索面中心线宜位于拱肋四分点处.

Abstract:: In this paper，ANSYS FEM program is used to study the lateral instability behavior caused by static—wind load of cable—stayed arch bridge．Furthermore，the parameters，including initial cable tension，towerheight，cable distance and position of cable on arch is considered in theoretical study．The results show thatcables can control buckling form effectively，and cable—stayed arch bridge has better performance of lateralwind—resistant stability．Initial cable tension，tower height can be increased，and cable distance can be re—duced to improve performance of lateral wind—resistant stability，and the effect of tower height is most extraordinary，increasing tower height ever doubled the performance of lateral wind—resistant stability nearly．Posi—tion of cable on arch has obvious effect on the performance of lateral wind—resistant stability，and cable—plane eenterline is appropriate in the quartile of arch rib．