风荷载作用下滨海地区水闸结构受力特性研究  

Force Characteristics of Sluice Structure in Coastal Area Under Wind Load

作　　者：张建 阳佳林 杨杰[3,4] ZHANG Jian;YANG Jialin;YANG Jie(Zhuhai Institute of Urban Planning&Design,Zhuhai 519000,China;Guangdong Coastal Area Disaster Prevention and Mitigation Engineering Technology Research Center,Zhuhai 519000,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China;Nanjing R&D Tech Group Co.,Ltd.,Nanjing 210029,China)

机构地区：[1]珠海市规划设计研究院,广东珠海519000 [2]广东省滨海地区防灾减灾工程技术研究中心,广东珠海519000 [3]南京水利科学研究院,江苏南京210029 [4]南京水科院瑞迪科技集团有限公司,江苏南京210029

出　　处：《人民珠江》2024年第5期132-142,共11页Pearl River

基　　金：国家自然科学基金面上项目(52279135)。

摘　　要：以广东省珠海市金湾区滨海商务区机场东路东侧主渠水闸为例,针对水闸结构所受风荷载,对比研究中英美日设计规范的计算方法,分析各国方法的差异;基于计算流体动力学数值模拟,对不同风向、规范风压及极端台风天气下水闸结构所受风荷载的分布情况进行研究;采用结构有限元分析不同风荷载工况下,水闸结构的受力特性,为滨海地区水闸结构的抗风设计提供一定的借鉴意义。研究结果表明:中国规范考虑风振系数后的风荷载值与英美日3国规范基本相当;水闸风向系数为0.75~1.03,风荷载可根据水闸朝向与主导风向的夹角乘以一定的风向折减系数;水闸背风面风荷载体型系数大于常规建筑物,建议水闸结构按照风敏感建筑进行风荷载计算;台风极端天气作用下,水闸结构风荷载在考虑风振系数的基础上再乘以一定的放大系数,并适当增加水闸结构的刚度以满足正常使用要求;考虑外海潮位及风暴增水的叠加影响,水闸结构地基承载力建议乘以不小于1.15的安全系数。This paper takes the sluice of the main channel on the east side of East Airport Road,Jinwan Coastal Business District,Zhuhai City,Guangdong Province as an example.Given the wind load on the sluice structure,the paper compares the calculation methods of the design standards in China,the UK,the US,and Japan and analyzes the differences in calculation methods among the four countries.Based on the numerical simulation of computational fluid dynamics,it studies the distribution of wind load on sluice structure in different wind directions,standard wind pressure,and extreme weather such as typhoon.With the structural finite element method,the force characteristics of sluice structure are analyzed under different wind load conditions,which provide some reference for the wind resistance design of sluice structure in coastal areas.The research results show that the wind load value of the Chinese standard considering the wind vibration coefficient is basically the same as that of the UK,the US,and Japanese standards.The wind direction coefficient of the sluice is between 0.75 and 1.03,and the wind load can be multiplied by a certain wind reduction factor according to the angle between the sluice and the dominant wind direction.The shape factor of wind load on the leeward side of the sluice structure is larger than that of general buildings.It is suggested to define the sluice as wind-sensitive building for wind load calculation.Under extreme weather such as typhoons,the wind load of the sluice structure should be multiplied by a certain amplification coefficient considering the wind vibration coefficient,and the stiffness of the sluice structure should be appropriately increased to satisfy the requirements of normal use.Considering the superimposed effect of offshore tide level and storm surge,it is recommended to multiply the bearing capacity of the sluice structure foundation by a safety factor of not less than 1.15.

关 键 词：风荷载 台风极端天气 水闸结构 计算流体动力学 受力特性 

分 类 号：TV222[水利工程—水工结构工程]