基于时域分析法气动阻尼对柔性结构风振系数响应的影响分析  

Analysis on Influence of Aerodynamic Damping on Wind-induced Response of Flexible Structure Based on Time-domain Analysis

作　　者：于永帅[1] 王文欣[1] 

机构地区：[1]天津市市政工程设计研究院,天津市300051

出　　处：《城市道桥与防洪》2014年第1期113-115,11-12,共3页Urban Roads Bridges & Flood Control

摘　　要：大跨度桥梁、高层建筑结构、大跨越输电塔线等柔性建筑结构越来越多地出现在国家基础设施建设中。这些土木工程结构共同特点就是结构柔度大,对风荷载敏感性强,静风变形和脉动风荷载下的随机振动响应比较复杂。气动阻尼等气动力参数对结构响应影响较大,研究和讨论结构气动阻尼,对结构风荷载模型的建立及合理化设计结构荷载有着非常重要的工程意义。以大跨度柔性输电线路-绝缘子串耦合体系为背景,基于时域的分析方法研究输电线路结构风致振动响应,讨论气动阻尼对结构响应影响,对现行建筑荷载规范中的高气动阻尼结构荷载设计提出建议。The flexible building structures of long-span bridges,high-rise buildings and large span transmission line are built more and more in the infrastructure construction of China.The common characteristics of these civil engineering structures are that the structure flexibility is great,the sensitivity is strong to wind load,and the stochastic vibration response is more complex under the static wind deformation and pulse wind load.The aerodynamic parameters of aerodynamic damping and etc.are important to the structure response.The study and discussion of the aerodynamic damping of structure are significant to establish the wind load model of structure and reasonably design the structure load.In terms of the long-span transmission line and insulator string coupling system as background,and based on the time-domain analysis to study wind-induced vibration response of transmission line,the article discusses the influence of aerodynamic damping on structures response,and puts forward the proposal for the design of high aerodynamic damping structure load.

关 键 词：柔性结构 风振响应 时域分析方法 气动阻尼 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]