大跨径悬索桥施工阶段颤振稳定性影响因素研究

发布时间：2018-08-10 22:38

【摘要】：基于全物理坐标法的ANSYS有限元模型,对中渡桥施工阶段颤振稳定性进行分析,分别研究对称与不对称施工、不同初始风攻角、结构阻尼等因素对施工阶段颤振稳定性的影响。研究结果表明:不对称施工顺序更有利于施工阶段的颤振稳定性;初始风攻角为-3°时有利于颤振稳定性,而+3°时最为不利;结构阻尼对颤振稳定性影响较大,特别是早期施工阶段尤为显著,可明显改善大跨度悬索桥施工阶段颤振稳定性。分析方法可为桥梁设计和研究人员提供参考。
[Abstract]:Based on the ANSYS finite element model of the whole physical coordinate method, the flutter stability of Zhongdu Bridge in construction stage is analyzed. The effects of symmetry and asymmetry construction, different initial wind attack angle and structure damping on flutter stability in construction stage are studied respectively. The results show that the asymmetrical construction sequence is more favorable to the flutter stability in the construction stage, the initial wind attack angle is 3 掳, the flutter stability is the most unfavorable at 3 掳, and the structural damping has a great influence on the flutter stability. Especially in the early stage of construction, the flutter stability of long span suspension bridge can be improved obviously. The analysis method can provide reference for bridge design and researchers.
【作者单位】：同济大学土木工程防灾国家重点实验室;长沙理工大学桥梁工程安全控制技术与装备湖南省工程技术研究中心;
【基金】：同济大学土木工程防灾国家重点实验室开发基金资助项目(KLWRTBMC) 国家自然科学基金资助项目(51278069,51208067) 湖南省教育厅优秀青年项目资助(12B009) 铁四院科研项目资助
【分类号】：U441.3

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