基于数值仿真和统计分析的洪水作用下桥墩作用效应分析  

Analysis of pier action effect under flood based on numerical simulation and statistical analysis

作　　者：吴春利[1] 黄诗茗 李魁 顾正伟[1] 黄晓明[2] 张炳涛[3] 杨润超[3] WU Chun-li;HUANG Shi-ming;LI Kui;GU Zheng-wei;HUANG Xiao-ming;ZHANG Bing-tao;YANG Run-chao(School of Transportation,Jilin University,Changchun 130022,China;School of Transportation,Southeast University,Nanjing 210018,China;Highway Administration of Jilin Province,Changchun 130021,China)

机构地区：[1]吉林大学交通学院,长春130022 [2]东南大学交通学院,南京210018 [3]吉林省公路管理局,长春130021

出　　处：《吉林大学学报（工学版）》2023年第6期1612-1620,共9页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家重点研发计划项目(2021YFB2600601,2021YFB2600600);吉林省教育厅科学技术研究项目(JJ⁃KH20211114KJ);吉林省科技发展计划项目(20230203137SF);吉林省交通运输科技计划项目(2021-01-02,2020-1-3,2020-1-7)。

摘　　要：为了解洪水对桥墩的作用规律,提出采用数值计算直接求解流动主控方程的方法获得各种流动现象规律。结合流体力学仿真分析技术,通过计算机数值计算和图像显示的方法描述流场的数值解,再采用拉丁超立方抽样和分层随机抽样,尽可能保证每一个变量的全覆盖,并用统计分析方法对抽样数据进行分析。针对洪水流速、桥墩形状、数量及间距、水流入射角度等多种洪水致灾关键因素对桥墩水平阻力效应的影响展开研究,获得了较全面、准确的洪水作用效应,建立了多种影响因素影响下的洪水致灾作用效应分析模型,为正确评估桥梁服役状态,确保洪灾下桥梁的安全运营提供了理论支撑。To understand the action law of flood on bridge pier,a numerical method was proposed to directly solve the main control equation of flow in order to find the law of various flow phenomena.Combined with the fluid dynamics simulation analysis technology,the numerical solution of the flow field was described by computer numerical calculation and image display,and then Latin hypercube sampling and stratified random sampling were adopted to ensure the full coverage of each variable as far as possible,and statistical analysis method was used to analyze the sampling data.Research was conducted on the influence of flood flow velocity,pier shape,pier number and spacing,water flow incidence Angle and other key flood disaster factors on the horizontal resistance effect of pier,to obtain a more comprehensive and accurate flood effect,and establish the flood disaster effect analysis model under the influence of various factors.In order to correctly evaluate the service status of bridge and provide theoretical support to ensure safe operation of bridge under flood.

关 键 词：桥梁工程 桥墩 洪水 作用效应 数值仿真 统计分析 

分 类 号：U441[建筑科学—桥梁与隧道工程]