【摘要】 基于随机振动理论,研究了大跨度拱桥在不同的地震动空间条件下的平稳随机地震响应特征,分析了局部场地效应、部分相干效应和行波效应对大跨度拱桥地震响应的影响,揭示了地震动空间变化对大跨度拱桥随机地震响应的影响规律。阐明了局部场地效应对大跨度拱桥地震响应的影响与其构造特性、位置、边界条件等因素有关;考虑空间相干效应可减小大跨度拱桥的地震反应;地震内力响应随地震视波速的增大而减少。更多还原

【Abstract】 Based on the theory of random vibration,the stationary random seismic response characteristics on long-span arch bridge under different condition of the spatical variable ground motions was investigated,and the influence of seismic response on long-span arch bridge under the local site effect,part of coherent effect and traveling wave effect was analysed,then the influence of the spatical variable ground motions on the long-span arch bridge random seismic response was demonstrated.It is showed that the influence of seismic response on long-span arch bridge is relative with its structure characteristics,position,boundary conditions;Considering the part of coherent effect,the seismic response increases insignificantly,while the seismic response of long-span arch bridge show an increasing trend with the seismic shear wave velocities increasing.更多还原