摘要
杭州湾跨海铁路大桥嘉甬通道所在海域台风频发,研究并明确台风期间风浪流参数特性对于保障跨海桥梁安全具有重要意义。首先,调研该海域的台风灾害、地形信息;然后,基于参数风场及波-流耦合数值模拟软件,计算对该海域产生严重影响的47条历史台风期间的风浪流参数;基于此对风浪流场的分布特征及风-浪、风-流、浪-流间关系进行讨论。台风期间研究海域风、浪场分布具有一定相似性;不同样本选取方式拟合出的风-浪关系存在差异;在相同风环境下,越靠近外海、水深越大,波高越大;Clayton copula能较好地描述风-流、浪-流联合分布,当概率密度为0.01时,计算得到风-流参数组合中最大风速为34.75 m/s,最大流速为1.87 m/s,浪-流参数组合中最大波高为6.43 m,最大流速为2.08 m/s。研究表明,为获取更真实的环境参数,设计时需充分考虑环境变量间的相关性。
The Jiayong Channel sea area,where the Hangzhou Bay Railway Sea-Crossing Bridge is located,has frequent typhoons.It is of great significance to study and clarify the characteristics of wind,wave and current parameters during typhoons to ensure the safety of cross-sea bridges.First,the typhoon disasters and topographic information in the area are investigated.Then,based on the parametric wind field and wave-current coupling model,the wind,wave and current parameters of 47 historical typhoons that seriously impacted the sea area are calculated.The distribution of the wind,wave,current fields,and the relationship between wind-wave,wind-current,and wave-current are discussed.Similar distributions of wind and wave fields in the sea area are observed during the typhoon.There are differences in the wind-wave relationship fitted by different sample selection methods.Under the same wind environment,the closer the open sea,the greater the water depth and the higher the wave height.Clayton copula can better describe the joint distribution of wind-current and wave-current.When the probability density is 0.01,the maximum wind speed and current speed considering the dependency of wind-current parameters are 34.75 m/s and 1.87 m/s respectively.Considering the dependency of wave-current parameters,the maximum wave height and current speed are 6.43 m/s and 2.08 m/s respectively.Studies have shown that to obtain more realistic environmental parameters,the correlation between environmental variables should be fully considered in the design.
作者
魏凯
徐洪权
钟茜
WEI Kai;XU Hongquan;ZHONG Xi(Department of Bridge Engineering,School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;China Railway Design Corporation,Tianjin 300308,China)
出处
《铁道标准设计》
北大核心
2023年第8期97-102,146,共7页
Railway Standard Design
基金
国家自然科学基金项目(51978578)。
关键词
台风
杭州湾
铁路桥
跨海大桥
风浪流参数
数值模拟
相关性分析
typhoon
Hangzhou Bay
railway bridge
sea-crossing bridge
wind wave and current parameters
numerical simulation
correlation analysis
