DOI: 10.11908/j.issn.0253-374x.21002

作者:

作者单位: 1.同济大学 土木工程防灾国家重点实验室，上海 200092;2.同济大学 桥梁结构抗风技术交通行业重点实验室，上海200092;3.克莱姆森大学 土木工程系，克莱姆森 29634;4.重庆大学 山地城镇建设与新技术教育部重点实验室，重庆 400045


作者简介: 方根深（1992-），男，助理研究员，工学博士，主要研究方向为桥梁与结构风工程。 E-mail： 2222tjfgs@tongji.edu.cn


通讯作者: 卫苗苗（1997-），女，博士生，主要研究方向为桥梁抗风。E-mail： 2011131@tongji.edu.cn

中图分类号: P47


基金项目:




Estimation and Application of Typhoon Extreme Wind Loadings at Typical Long-Span Bridge Sites in Coastal Regions
Author:

Affiliation: 1.State Key Laboratory of Disaster Reduction of Civil Engineering， Tongji University， Shanghai 200092， China;2.Key Laboratory of Transport Industry of Bridge Wind Resistance Technologies， Tongji University， Shanghai 200092， China;3.Glenn Department of Civil Engineering， Clemson University， Clemson 29634，USA;4.Key Laboratory of New Technology for Construction of Cities in Mountain Area of the Ministry of Education， Chongqing University， Chongqing 400045， China


Fund Project:




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摘要:基于日本气象局1951年至2015年西北太平洋最佳路径数据库，采用地理加权回归方法，分别建立了台风路径、强度和风场参数递推模型，并结合台风边界层三维风场解析模型，提出了适用于我国沿海地区台风风灾模拟的随机模拟算法。以深中通道伶仃洋航道桥为工程背景，开展了桥址区10万年台风随机模拟，分别构建了极值风速的重现期曲线、超越概率曲线和竖向风剖面等，可直接应用于指导桥梁的抗台风设计。最后，在考虑伶仃洋航道桥结构参数和气动参数不确定性基础上，开展了该桥的颤振可靠度分析，评估其在台风作用下的颤振失效概率和安全性能。



Abstract:Based on the best track dataset of typhoon in the Northwest Pacific from 1951 to 2015 provided by the Japan Meteorological Administration， the typhoon tracking， intensity and wind field parameter models are developed utilizing the geographically weighted regression approach， respectively. A stochastic simulation algorithm that is applicable for the typhoon wind hazard assessment in southeast coastal regions of China is then proposed by introducing a three-dimensional analytical typhoon boundary layer model. A case study is conducted by taking the Lingdingyang Bridge as an engineering example， which is the main navigable channel in the Shenzhong Link project.A 100 000-year typhoon simulation is conducted at the bridge site. The return period curve， the probability of exceedance curve and the vertical wind profile of extreme wind speed are constructed respectively， which can be directly used to guide the wind-resistant design of bridges. Finally， the flutter reliability analysis of the Lingdingyang Bridge is performed by introducing the uncertainties of structural and aerodynamic parameters. Its flutter failure probability and safety performance under typhoon winds are evaluated.





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