摘要
为了研究抗风缆在大跨悬索桥抗风措施中的应用,基于ANSYS软件建立了新疆赛吾迭格尔桥的有限元模型,研究了改变抗风缆拉杆与水平方向夹角、抗风缆拉杆长度、抗风缆张力的不同形式抗风缆对桥梁动力特性的影响及抗风缆与其他措施的联合应用。通过研究分析表明,抗风缆的应用使结构刚度有所增加,相应的各阶振型频率增加;因所选择抗风缆形式的不同,各类振型受影响的程度不同,其中1阶反对称竖弯的频率增加最为明显;抗风缆角度对于桥梁竖弯振型影响明显;拉杆长度对于桥梁动力特性影响不显著,抗风缆的张力对扭转振型控制明显;缆内张力越大,对侧弯、竖弯和扭转频率的影响也越大。
In order to research the application of wind cable in long-span suspension bridge, the finite element model of Xinjiang Saiwudiege＇ er Bridge was built based on ANSYS software. The effect of different wind cables including change the angle between wind cable and horizontal direction of the pull rod, the length of the pull rod and the tension of the pull rod on the dynamic property of the bridge was analyzed, and the combined application of wind cable with other measures. The research indicates that （1） the application of the wind cable makes the stiffness increase as well as the frequencies of corresponding vibration modes; （2） the effect of vibration modes are different due to different forms of wind cable, the increase of the first order antisymmetric vertical bending frequency is the largest; （3） the angle of the wind cable has great effect on vertical bending, the length of the pull rod has little effect on the bridge＇s dynamic property; （4） the tension has great effect on torsion vibration mode, the larger the tension, the larger the torsional frequency of the lateral and vertical bendings.
出处
《公路交通科技》
CAS
CSCD
北大核心
2010年第7期83-87,共5页
Journal of Highway and Transportation Research and Development
关键词
桥梁工程
大跨悬索桥
动力特性
抗风缆
抗风措施
bridge engineering
long-span suspension bridge
dynamic property
wind cable
wind-resistant measure
