【摘要】 某独塔斜拉桥桥塔装有横撑和风缆,是一种新型桥塔,基于ANSYS软件对其自立状态下的整体动力特性和风缆动力特性进行了计算,并分析了它们的影响因素。结果表明,横撑和风缆增大了桥塔横桥向弯曲频率和扭转频率,而略微减小了顺桥向弯曲频率;风缆是否分段建模对桥塔低阶振型和频率没有影响,而对高阶振型和频率有影响;桥塔频率对风缆初张力不敏感;风缆频率对风缆初张力比较敏感,而且随着初张力的增大而逐渐增大,但频率增幅逐渐减小。更多还原

【Abstract】 Based on a cable-stayed bridge with single pylon,dynamic property of a new type of pylon with wale and wind cable in free-standing state is calculated via ANSYS software,and key effective factors of dynamic property are analyzed.The research results show that wale and wind cable raise bending frequency in transverse direction and torsional frequency,but reduce bending frequency in longitudinal direction slightly.In the finite element model,whether the wind cable is segmented or not does not have effect on low-order modes and frequencies of the pylon,but has effect on high-order modes and frequencies.Frequencies of the pylon are not sensitive to the initial stress of wind cable.As for the frequencies of wind cable,they are very sensitive to the initial stress of wind cable,because they increase with the increasing of the initial stress of wind cable,but the more the initial stress of wind cable is,the more slowly they increase.更多还原