| 大跨悬索桥动力特性的敏感性分析 |
| |
| 引用本文： | 徐勋,强士中.大跨悬索桥动力特性的敏感性分析[J].东北林业大学学报,2009,37(2). |
| |
| 作者姓名： | 徐勋 强士中 |
| |
| 作者单位： | 西南交通大学,成都,610031 |
| |
| 基金项目： | 国家自然科学基金，交通部西部交通建设科技项目 |
| |
| 摘 要： | 以四渡河悬索桥为研究背景,建立了该大跨钢桁架加劲梁悬索桥的空间动力计算模型,研究了土-桩-桥相互作用和中央扣的设置方式对大跨悬索桥动力特性的影响.结果表明,土-桩-桥相互作用对悬索桥动力特性的影响主要是以塔振动为主的频率减小;中央扣的设置使得悬索桥刚度有所增加,相应的各阶频率增大,但各类振型受影响的程度不同,其中反对称扭转振动频率和以纵飘振动为主的频率增加最为显著,并且刚性中央扣作用高于柔性中央扣.
|
| 关 键 词： | 大跨悬索桥 动力特性 影响因素 子空间迭代法 中央扣 土-桩-桥相互作用 |
Influence of Sensitive Factors on Dynamic Behavior of Long-Span Suspension Bridge |
| |
| Xu Xun,Qiang Shizhong.Influence of Sensitive Factors on Dynamic Behavior of Long-Span Suspension Bridge[J].Journal of Northeast Forestry University,2009,37(2). |
| |
| Authors: | Xu Xun Qiang Shizhong |
| |
| Institution: | Xu Xun,Qiang Shizhong(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,P.R.China) |
| |
| Abstract: | A spatial dynamic finite element model for Sidu River Bridge,a suspension bridge with steel truss stiffening girder,was established on the basis of self-vibration behavior analyzed by the subspace iteration method of the geometrical nonlinearity.Then effects of soil-pile-bridge interaction and central buckle on dynamic behavior of long-span suspension bridge were studied.Analytical results show that effects of soil-pile-bridge interaction mainly reduced the frequencies of the tower-related modes of suspensi... |
| |
| Keywords: | Long-span suspension bridges Self-vibration behavior Influencing factors Subspace iteration method Central buckle Soil-pile-bridge interaction |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
