摘要
采用Miyata T准定常气动力模型,通过双变量泰勒展开,导出12阶单元气动阻尼矩阵和气动刚度矩阵,并在ANSYS中以Matrix27单元输入来考虑桥梁结构风致抖振自激力模型,结合桥址处脉动风场的模拟,对某连续刚构桥最大双悬臂阶段和成桥运营阶段进行线性抖振时程响应分析。最后对脉动风荷载作用下的结构响应值和静阵风荷载作用结果进行了比较,得到脉动增大系数值。
By applying two-variable Taylor expansion to the Miyata T quasi-steady model,12-order element aerodynamic damping matrix and aerodynamic stiffness matrix equivalent to the self-excited force order are derived.The self-excited forces are input in ANSYS in form of the element aerodynamic damping matrix and aerodynamic stiffness matrix through Matrix 27.Combining the simulation of the turbulent stochastic wind-velocity field of bridge site,linear time-domain buffeting analysis of the bridge in the post-construction stage and in the longest twin-cantilever construction stage is carried out.The bridge's mechanic responses to the static gust wind and turbulent wind are compared and the fluctuating amplifying coefficients are obtained in the end.
出处
《中国市政工程》
2007年第3期44-46,共3页
China Municipal Engineering
基金
建设部软科学研究开发项目(06-k3-14)
关键词
连续刚构桥
风场模拟
抖振分析
时程响应
continuous rigid frame bridge
wind-velocity field simulation
buffeting analysis
time history response
