摘要
风荷载作用下,大跨度桥梁结构的抗风性能是影响其设计与施工的控制性因素。在我国南方沿海地区,采用悬臂施工法施工的大跨度桥梁须考虑最大悬臂施工状态下抵御台风侵袭的安全性问题。以广西藤县主跨135m的北流河大桥为例,分析其在最大悬臂施工状态下的抗风性能。应用ANSYS软件建立最大悬臂状态下的桥梁有限元模型,并采用Fluent大型计算流体力学软件模拟桥梁在台风等极端气象条件作用下的受力特性。结果显示,桥梁在最大悬臂状态下能够抵御一般台风作用,但若遭受龙卷风袭击,存在风致损毁风险。
Under the action of wind load,the wind-resistant performance of the large-span bridge structure is a controlling factor affecting the design and construction.In the southern coastal area of China,it is necessary for the large-span bridge constructed with the cantilever construction method to consider the safety issue that resists typhoon invasion under the maximum cantilever construction state.Taking the Beiliuhe bridge with a main span of 135m in Teng county of Guangxi as an example,the wind-resistant performance of the bridge under the maximum cantilever state during construction is analyzed.The finite element model of the bridge under the maximum cantilever state is established by applying the ANSYS software,and the stress characteristics of the bridge under the extreme weather conditions such as typhoon and so on are simulated by using the large-scale computational fluid dynamics software Fluent.The results show that,the bridge can withstand the action of ordinary typhoon under the maximum cantilever state,but there is a risk of wind-induced damage if it is hit by tornado.
作者
冯清华
刘世忠
冯雄雄
李先文
Feng Qinghua;Liu Shizhong;Feng Xiongxiong;Li Xianwen(School of Civil Engineering of Lanzhou Jiaotong University,Lanzhou 730070,China;Detong Construction Group Co.,Ltd.,Yulin 719000,China;Guangxi Guitong Engineering Management Group Co.,Ltd.,Nanning 530000,China)
出处
《北方交通》
2025年第7期26-30,共5页
Northern Communications
关键词
公路桥梁
台风
龙卷风
连续梁
最大悬臂状态
CFD数值模拟
安全性分析
Highway bridge
Typhoon
Tornado
Continuous beam
Maximum cantilever state
CFD numerical simulation
Safety analysis
