大跨拱形结构等效静力风荷载  

Equivalent Static Wind Loads on Large-Span Arched Structures

作　　者：马宁[1] 汪汛[1] 洪荣华[1] 周岱[1,2] 李芳菲[1] 马晋[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]高新船舶与深海开发装备协同创新中心,上海200240

出　　处：《上海交通大学学报》2016年第3期317-323,330,共8页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金项目(51278297);高等学校博士学科点专项科研基金项目(20130073110096);上海市领军人才计划项目(13XD1402100)资助

摘　　要：基于计算流体动力学(CFD)方法和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,以此作为数值风洞模拟的入口边界条件.运用FLUENT软件对大跨拱形结构进行脉动风作用下结构的非稳态分析,得到作用于结构的时程风压荷载;运用ANSYS分析软件进行结构的风振响应计算,分析获得了基于结构风振响应时程的等效静力风荷载.提出多目标等效静力风荷载加权组合系数的定义,计算获得了大跨拱形结构的多目标等效静力风荷载,并验证了其计算精度.研究结果表明,在基于该方法所得等效静力风荷载作用下,结构静力响应计算结果与风振动力时程响应极值吻合.Based on computational, fluid dynamics （CFD） and the finite element dynamic time-history.analy- sis method, the time-history speed of fluctuating wind was simulated by using the numerical method which was used as inlet boundary condition of numerical wind tunnel. Then, non-steady-state analysis on a large- span arched structure was made by using the FLUENT software to get the time-history wind loads. Mean- while, the wind-induced vibration response was analyzed using the ANSYS software. After that, equiva- lent static wind loads （ESWL） based on time history response were obtained and the definition of multi-ob- jective ESWL combination factors was proposed. Finally, the multi-objective ESWL of the open large-span arched structure were obtained with their accuracy verified. The study shows that the static response val- ues under ESWL and extreme response values in dynamic analysis are in good agreement.

关 键 词：大跨拱形结构 风速时程 多目标组合系数 等效静力风荷载 

分 类 号：TU312.1[建筑科学—结构工程]