摘要
对海口世纪大桥进行了动力特性计算 ,采用反应谱理论分析了大桥的抗震能力 ,讨论了各振型的内力和位移的组合方法 ,采用 Van der put公式和 Herzog公式分析了大桥各阶段的抗风稳定性 ,其抗风稳定性在主梁节段模型颤振试验中得到了验证 ,提出了施工阶段的抗风措施。结果表明 ,本桥的抗震抗风能力是有保证的。
The dynamic characteristic of the Haikou Century Bridge is presented, the aseismic capacity according to the theory of earthquake response spectrum is analysised and the combination method of inner force and displacements is discussed in every mode of vibration. The anti wind stability analysised using formulas of van der put and Herzog which is proved by the flutter experiment of the main girder model and the anti wind measurements for construction phase are also introduced.Finally it shows that the aseismic and anti wind capacity of the bridge is ensured.
关键词
斜拉桥
动力分析
抗震
抗风
振型
海口世纪大桥
cable stayed bridge
dynamic structure analysis
anti seismic
anti wind
mode of vibration
