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机构地区:[1]内蒙古科技大学建筑与土木工程学院,内蒙古包头014010 [2]北京多维联合集团,河北香河065400
出 处:《内蒙古科技大学学报》2013年第4期392-395,共4页Journal of Inner Mongolia University of Science and Technology
摘 要:在悬索桥有限元模型上加抗风缆,施加风荷载,用二维线性方法计算桥梁临界失稳风速,计算在不同风荷载下跨中节点的横向、竖向和扭转位移.通过比较施加抗风缆前后桥梁跨中的响应表明:侧向位移显著减小,横向屈曲临界风速有所提高,表明侧向刚度增加;但竖向位移增大,通过比较加缆前后跨中节点的位移,加缆后扭转失稳有所提前,扭转发散临界风速有所降低.Wind cable and wind load were applied on the finite element of suspension bridges, and the two-dimensional linear method was used to calculate the critical instability wind velocity of Bridges . The calculation was carried out under different wind load across the nodes in the horizontal, vertical and torsional displacement. The comparisons of the response between before and after the applica- lion of the wind cable bridge show that the lateral displacement decreased significantly, and the lateral stiffness ira',teased while the ver- tical displacement increased . The comparisons of the displacement across nodes show that after the cable was added, the torsional instabilily appeared in advance, and the critical wind speed of torsional divergence decreased.
关 键 词:大跨度悬索桥 抗风缆 静风稳定性 临界风速 失稳
分 类 号:U411.3[交通运输工程—道路与铁道工程]
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