大跨度缆索承重桥梁风振控制回顾与思考——主梁被动控制效果与主动控制策略  

Reconsideration of wind-induced vibration mitigation of long-span cable supported bridges:effects of passive control and strategy of active control

作　　者：赵林[1] 葛耀君[1] 郭增伟[1] 李珂[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《土木工程学报》2015年第12期91-100,共10页China Civil Engineering Journal

基　　金：科技部国家重点基础研究973计划(2013CB036300);交通部应用基础研究项目(2013319822070);国家自然科学基金(91215302;51178353和51222809);新世纪优秀人才支持计划

摘　　要：桥梁风工程研究多采用外观形态和安装位置固定的被动气动措施,面对未来规划中的超大跨度桥梁,难于缓解随跨径增长的服役期内强健性能需求。在总结和回顾桥梁主梁气动控制措施发展历程后,由理论算法、物理模型尺度效应和复杂来流流态等三个方面,对比归纳了导致大跨桥梁风致行为在数值计算、风洞试验和现场实测等多尺度验证过程存在差异的原因;着重以主动气动措施为对象,综述了近三十年相关技术的发展过程,总结了现有的主动气动措施具有控制能力针对特定来流条件、控制性能仅适用特定风振现象、控制效果具有结构外形尺寸敏感性的特点和不足,由此提出研发具有实时反馈机制的自适应主动控制面气动措施等发展趋势。Passive aerodynamic control methods with fixed shapes and installation positions have been widely used in research of bridge wind engineering. However, some shortcomings could not be ignored for the increasing demands of robustness in life cycle period for super long-span bridges in plan. Development of aerodynamic control methods, especially for main girders of bridges, for wind-induced vibration is briefly reviewed. Some reasons about obvious difference between numerical calculation, wind tunnel tests and in-situ measurements are concluded as theoretical algorithm, structural size effects and complex incoming flow. With more concentration on active aerodynamic control, the development in the past 30 years is reviewed. The alternative method named self-adaptive active control plate with real time feedback mechanics is proposed , and some possible characteristics of new approach are also discussed.

关 键 词：大跨度桥梁 风致行为 强健性 多尺度比较 被动和主动控制 

分 类 号：TU997[建筑科学—市政工程]