Non-linear buffeting response analysis of long-span suspension bridges with central buckle  

作　　者：Wang Hao1,2,Li Aiqun1,Zhao Gengwen1 and Li Jian2 1.College of Civil Engineering,Southeast University,Nanjing 210096,China 2.Civil and Environmental Engineering,University of Illinois at Urbana-Champaign,Urbana,IL 61801,USA 

出　　处：《Earthquake Engineering and Engineering Vibration》2010年第2期259-270,共12页地震工程与工程振动（英文刊）

基　　金：The Key Project of the National Natural Science Foundation of China Under Grant No.50538020; the National Science Fund for Distinguished Young Scholars Under Grant No.50725828; the National Natural Science Foundation of China Under Grant No.50978056;the National Natural Science Foundation of China for Young Scholars Under Grant No.50908046; the Ph.D.Programs Foundation of Ministry of Education of China (No.200802861012)

摘　　要：The rigid central buckle employed in the Runyang Suspension Bridge (RSB) was the first time it was used in a suspension bridge in China. By using a spectral representation method and FFT technique combined with measured data,a 3D fluctuating wind field considering the tower wind effect is simulated. A novel FE model for buffeting analysis is then presented,in which a specific user-defined Matrix27 element in ANSYS is employed to simulate the aeroelastic forces and its stiffness or damping matrices are parameterized by wind velocity and vibration frequency. A nonlinear time history analysis is carried out to study the influence of the rigid central buckle on the wind-induced buffeting response of a long-span suspension bridge. The results can be used as a reference for wind resistance design of long-span suspension bridges with a rigid central buckle in the future.The rigid central buckle employed in the Runyang Suspension Bridge (RSB) was the first time it was used in a suspension bridge in China. By using a spectral representation method and FFT technique combined with measured data,a 3D fluctuating wind field considering the tower wind effect is simulated. A novel FE model for buffeting analysis is then presented,in which a specific user-defined Matrix27 element in ANSYS is employed to simulate the aeroelastic forces and its stiffness or damping matrices are parameterized by wind velocity and vibration frequency. A nonlinear time history analysis is carried out to study the influence of the rigid central buckle on the wind-induced buffeting response of a long-span suspension bridge. The results can be used as a reference for wind resistance design of long-span suspension bridges with a rigid central buckle in the future.

关 键 词：suspension bridge buffeting response central buckle nonlinear time history analysis ANSYS 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]