大跨度拱形结构等效静风荷载研究（英文）

发布时间：2018-06-15 00:03

本文选题：大跨度拱形结构 + 等效静风荷载　；参考：《空间结构》2016年04期

【摘要】：根据计算流体动力学方法(CFD)以及有限元动力时程分析法数值模拟脉动风特性,获取脉动风速时程,并以此作为数值风洞模拟的入口边界条件.运用FLUENT对大跨度拱形结构进行脉动风作用下的结构非稳态分析,得到作用于结构的时程风压荷载.运用ANSYS进行结构的风振响应计算,分析得到基于结构风振响应时程的等效静风荷载.在此基础上提出多目标等效静风荷载加权组合系数的定义,计算获得大跨度拱形结构的多目标等效静风荷载,并验证其计算精度.研究表明,在文中方法所得等效静风荷载作用下,结构静力响应计算结果与风振动力时程响应极值吻合.
[Abstract]:According to the computational fluid dynamics method (CFDs) and the finite element dynamic time-history analysis (FEM), the pulsating wind characteristics are numerically simulated, and the pulsating wind velocity time-history is obtained, which is used as the inlet boundary condition of the numerical wind tunnel simulation. Using fluent to analyze the unsteady state of long-span arch structure under pulsating wind, the time-history wind pressure load acting on the structure is obtained. The wind-induced vibration response of the structure is calculated by ANSYS, and the equivalent static wind load based on the time-history of the wind-induced vibration response of the structure is obtained. On this basis, the definition of multi-objective equivalent static wind load weighted combination coefficient is proposed, and the equivalent multi-objective static wind load of long-span arch structure is obtained, and the accuracy of the calculation is verified. The results show that under the equivalent static wind load, the calculated results of the static response of the structure are in agreement with the extreme value of the time-history response of the wind-induced vibration.
【作者单位】：上海交通大学船舶海洋与建筑工程学院;
【基金】：National Natural Science Foundation of China(51278297,51679139) Major Program of the National Natural Science Foundation of China(51490674) Research Program of Shanghai Leader Talent(No.20) Doctoral Disciplinary Special Research Project of Chinese Ministry of Education(20130073110096)
【分类号】：TU312.1

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