期刊论文

COUPLED VIBRATION MODEL FOR TOWER-CABLE-DECK OF LONG-SPAN CABLE-STAYED BRIDGE AND ITS RESPONSE ANALYSIS

Liu, Z.

中文

固体力学学报

Guti Lixue Xuebao/Acta Mechanica Solida Sinica

0254-7805

2015

22

5

444-452

10.19636/j.cnki.cjsm42-1250/o3.2015.05.010

国家自然科学基金项目(51278282)； 湖北省教育厅科学技术研究项目(Q20131307)资助；

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针对大跨度斜拉桥拉索与桥塔、桥面的协同振动问题,考虑拉索垂度、阻尼、倾角以及重力弦向分力的影响,引入拉索高精度抛物线形,建立了桥塔-索-桥面连续非线性精细化振动模型,推导了桥塔和桥面共同激励作用下斜拉索耦合振动方程,对比分析了2种激振模式下斜拉索的参数振动特性,并编制程序研究了桥面与拉索的频率比、桥面激励幅值、索力及阻尼对结构耦合振动特性的影响规律.结果表明：桥面与拉索频率比对系统振动的影响较大,频率比为1∶2和2∶1时拉索均产生强烈振动,但2∶1激振模式下拉索振幅更大,达到共振时间较长;随着桥面激励幅值的增大,2∶1亚谐波共振模式下的拉索振幅增长速率更快;拉索振幅随...

In order to analyze coupled vibration of tower-cable-deck of long-span cable-stayed bridge under end excitation, the high precision parabola was specially introduced, with the cable sag, cable angle, cable damping and the tangential component of gravity along the cable being considered. Then a refined coupled vibration model of tower-cable-deck was established and the nonlinear vibration differential equation of tower-cable-deck under end excitation was obtained. The vibration characteristics of cable under different modes was compared with eac...