Investigation on flutter mechanism of long-span bridges with 2d-3DOF method

被引：33

作者：

Yang, Yongxin ^{[1
]}

Ge, Yaojun ^{[1
]}

Xiang, Haifan ^{[1
]}

机构：

[1] Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai 200092, Peoples R China

来源：

WIND AND STRUCTURES | 2007年 / 10卷 / 05期

关键词：

aerodynamic instability; flutter analysis; long span bridge; coupling effect; flutter mechanism; central slotting; vent width;

D O I：

10.12989/was.2007.10.5.421

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

A two-dimensional flutter analysis method (2d-3DOF method) was developed to simultaneously investigate the relationship between oscillation parameters and aerodynamic derivatives of three degrees of freedom, and to clarify the coupling effects of different degrees of freedom in flutter instability. With this method, the flutter mechanism of two typical bridge deck sections, box girder section and two-isolated-girder section, were numerically investigated, and both differences and common ground in these two typical flutter phenomena are summarized. Then the flutter stabilization effect and its mechanism for longspan bridges with box girders by using central-slotting were studied by experimental investigation of aerodynamic stability and theoretical analysis of stabilizing mechanism. Possible explanation of new findings in the evaluation trend of critical wind speed through central vent width is finally presented.

引用

页码：421 / 435

页数：15

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