静态均布人群对大跨人行悬索桥气动参数的影响  被引量:3

Effect of Static Distributed Pedestrians on the Aerodynamic Parameters of a Long-span Pedestrian Suspension Bridge

在线阅读下载全文

作  者:李宇[1] 王佳豪 范陆 李琛[2] 李加武[1] LI Yu;WANG Jiahao;FAN Lu;LI Chen;LI Jiawu(School of Highway,Chang’an University,Xi’an 710064,China;School of Architecture,Chang’an University,Xi’an 710061,China)

机构地区:[1]长安大学公路学院,陕西西安710064 [2]长安大学建筑学院,陕西西安710061

出  处:《湖南大学学报(自然科学版)》2023年第5期74-84,共11页Journal of Hunan University:Natural Sciences

基  金:国家自然科学基金资助项目(51978077);陕西省自然科学基础研究计划资助项目(2022JQ-507,2023-JC-YB-438);重庆市渝院士牵头创新引导专项(2022YSZX-JSX0003CSTB)。

摘  要:以某大跨人行悬索桥为例,利用ANSYS建立了有限元模型,并进行了动力特性分析.再根据德国《人行桥设计指南》(EN03-08)的行人交通级别,按照不同工况的静态均布人群密度(μ)将人体模型布置在节段模型上,以设计人-桥系统的节段模型,并通过测力和测振的风洞试验获得了不同μ的静力三分力系数和气动导数,进而研究了μ对大跨人行悬索桥的静力三分力系数(阻力系数CD、升力系数CL和扭矩系数CM)和气动导数[H_(i)^(*)、A_(i)^(*)(i=1,2,3,4)]的影响.结果表明:1)随着行人数量的增加,CD和CM都逐渐增大,C_(L)则逐渐减小;2)人群密度对直接气动导数(H_(1)^(*)、A_(2)^(*)、A_(3)^(*)、H_(4)^(*))和间接气动导数(A_(1)^(*)、H_(2)^(*)、H_(3)^(*)、A_(4)^(*))的影响都十分显著;3)静态均布人群在改变了主梁的气动参数后,会显著影响大跨人行悬索桥的侧向和扭转的抖振响应.Taking a long-span suspension footbridge as an example,its finite element model was established by using ANSYS software,and the dynamic characteristics analyses were conducted.According to the pedestrian traffic classes in the Design of Footbridges Guidelines(EN03-08)and static distributed pedestrian densities(μ)under different working conditions,the pedestrian models were installed on the section model to be the pedestrian-bridge section models.Then,the force-measured and free vibration wind tests were conducted to obtain the aerostatic three-component force coefficients and the flutter derivatives with variousμ.Meanwhile,the effect of static distributed pedestrians on the aerostatic force coefficients[drag force coefficient(C_(D)),lift force coefficient(C_(L)),and pitching moment coefficient(C_(M))]and the flutter derivatives[Hi^(*)、A_(i)^(*)(i=1,2,3,4)]were investigated.The influence ofμon the direct and indirect flutter derivatives is significant;3)after the above aerodynamic parameters are changed,the static distributed crowd significantly affects the lateral and torsional buffeting response of the longspan pedestrian suspension bridge.

关 键 词:人行桥 风洞 静态均布人群 静力三分力系数 气动外形 

分 类 号:U448.27[建筑科学—桥梁与隧道工程]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象