| Title |
Buffeting Responses of Concrete Cable-stayed Bridge Considering Turbulent Characteristics of Bridge Site |
| Keywords |
concrete cable-stayed bridge;aerodynamic admittance function;active turbulence;buffeting analysis;wind tunnel test;콘크리트 사장교;공력 어드미턴스 함수;능동난류;버페팅 해석;풍동실험 |
| Abstract |
This study presents the aerodynamic admittance function of bridge girder under turbulent flow generated from wind velocity spectrum measured at bridge site. Three dimensional buffeting analysis of concrete cable-stayed bridge were performed considering aerodynamic admittance functions obtained from four different methods. It is revealed from the analysis that vertical buffeting responses considering proper aerodynamic admittance functions were just half of that neglecting aerodynamic admittance function. Grid turbulence was found to relatively lower the aerodynamic admittance function at low frequency range, and to underestimate the buffeting wind forces. It is recommended to use the aerodynamic admittance function evaluated from flutter derivatives or measured at active turbulence in order to properly predict the buffeting responses of bridges. |