考虑台风空间位置的桥址区风特性模型实测研究  

Measurement study on wind characteristics model at bridge site considering typhoon spatial position

作　　者：张寒[1] 王浩[1] 徐梓栋 陶天友[1] 茅建校[1] 郜辉 ZHANG Han;WANG Hao;XU Zi‑dong;TAO Tian‑you;MAO Jian‑xiao;GAO Hui(Key Laboratory of C&PC Structures of Ministry of Education,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京211189

出　　处：《振动工程学报》2023年第5期1430-1436,共7页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(51978155,51908125,52108274);江苏省自然科学基金资助项目(BK20190359);中央高校基本科研业务费专项资金资助项目(2242020k1G013)。

摘　　要：风特性是桥梁结构抗风设计的前提条件。为准确表征台风移动对桥址区风特性的影响,利用桥梁结构健康监测系统测得的多次台风实测数据,研究了考虑台风空间位置的桥址区风特性模型。基于已有台风解析模型和台风路径数据,模拟了台风过境期间桥址区平均风速时程,并利用实测结果验证了解析模型的有效性。在此基础上,分析了湍流强度、阵风因子、湍流积分尺度等脉动风特性参数随桥址区和台风中心距离的变化规律,据此研究了脉动风特性参数的空间分布模型。结果表明,已有台风解析模型可实现桥址区平均风速的模拟;台风空间位置变化对桥址区脉动风特性影响显著,空间分布模型能有效反映台风移动过程中桥址区脉动风特性的基本变化特征,可为大跨度桥梁等工程结构设计与运维提供有益参考。Wind characteristics are important for wind resistance design of bridges.The wind characteristic model considering the location of typhoon is investigated using the typhoon wind data measured by the bridge structural health monitoring system to char-acterize the influence of typhoon movement on the wind characteristics at the bridge site.Based on the existing typhoon analytical model and typhoon path data,the time history of mean wind speed at the bridge site during typhoon is simulated,which is regarded as the validation of the analytical typhoon model.On this basis,the variation of fluctuating wind characteristic parameters such as turbulence intensity,gust factor and turbulence integral scale with the distance between the bridge site and the typhoon center are analyzed.The spatial distribution model of fluctuating wind characteristic parameters is investigated.The results show that the ex-isting typhoon analytical model can simulate the mean wind speed at the bridge site.The spatial positions of typhoons present a sig-nificant influence on the characteristics of fluctuating wind at the bridge site.The model in this paper can effectively reflect the varia-tion of fluctuating wind characteristics at the bridge site during typhoons,which is expected to be a useful reference for the design,operation and maintenance of structures such as long-span bridges.

关 键 词：桥梁结构健康监测 台风 风特性 桥址区 风场模型 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U441.2[交通运输工程—道路与铁道工程]