拱型波纹屋盖结构风致振动数值模拟研究  

Numerical Stimulation Studies on the Wind-induced Vibration of the Arch Corrugated Roof

作　　者：张德生[1] 李远瑛[1] 

机构地区：[1]嘉应学院土木工程学院,广东梅州514015

出　　处：《湘潭大学自然科学学报》2014年第3期41-46,共6页Natural Science Journal of Xiangtan University

基　　金：广东省自然科学基金项目(S2011010001679)

摘　　要：为研究拱型波纹屋盖结构在脉动风作用下的风振响应及位移风振系数,利用MATLAB语言编制波纹拱在不同跨度、矢跨比及支座约束情况下的风速数值模拟程序,得到各节点位置处风压时程,并将风压施加在有限元分析模型的单元上,利用ANSYS有限元分析软件对18m、30m跨波纹拱进行水平及竖向平均风、脉动风作用下的风振响应分析,得到了结构的风振系数.计算结果得出,结构在脉动风作用下位移的变形特点与相应平均风作用相一致,结构在脉动风作用下的各节点竖向位移大于在平均风作用下的位移,且水平脉动风作用下的竖向位移大于在竖向脉动风作用下的位移.风振系数随着结构的跨度增大而增大,支座约束为固支波纹拱的风振系数小于铰支波纹拱,因此提高结构刚度可以降低结构的风振系数.In order to research the arch corrugated roof structure wind-induced dynamic response and the displacement wind vibration coefficient subjected to fluctuating wind load,using MATLAB to compile the wind speed numerical simulation program of arch corrugated roof in different span,rise-span ratio and support constraint conditions,to get each node location of wind pressure time-history,and the wind pressure was applied to the elements of finite element analysis models.The wind-induced dynamic response of arch corrugated roof with 18 m,30 m span was analyzed under horizontal and vertical average wind,fluctuating wind load by using the finite-element analysis software of ANSYS.And the wind vibration coefficient of structure was obtained.The calculation results showed that the deformation characteristics of the displacement of structure subjected to fluctuating wind was consistent with the corresponding average wind effect.The vertical displacement of each node subjected to fluctuating wind load was greater than that under the average wind load.The vertical displacement subjected to level of fluctuating wind load was larger than that under vertical of fluctuating wind load.The wind vibration coefficient increased with the increase of span.The wind vibration coefficient under fixed supported of arch corrugated roof was less than the hinge.The wind vibration coefficient of structure would reduce when the stiffness of the structure was improved.

关 键 词：拱型波纹屋盖结构 风致振动 位移风振系数 ANSYS 

分 类 号：TU323.3[建筑科学—结构工程]