Flutter analysis of Stonecutters Bridge

Full-bridge aeroelastic model wind tunnel tests for the Stonecutters Bridge

“…This kind of deck section could sustain high critical wind speed for the onset of flutter. The aerodynamic stability of the Stonecutters Bridge was studied by Hui et al [6], Yau and Hui [7] and Hui et al [8] and confirmed to be satisfactory. Sato et al [4] studied a combined 1-box and 2-box girder section and found from the multi-mode flutter analyses to a suspension bridge having a main span of 2500 m that the flutter onset velocity in the 2-box and 1-box combined girder can be notably higher than that in the 1-box combined girder.…”

PRACTICAL GUIDELINES FOR THE NATURAL EXCITATION TECHNIQUE (NExT) AND THE EIGENSYSTEM REALIZATION ALGORITHM (ERA) FOR MODAL IDENTIFICATION USING AMBIENT VIBRATION

“…has been used in a large number of studies. Consider a multi-degree-of-freedom structure described by the differential equation of motion Mÿ(t) + Cẏ(t) + Ky(t) = F(t) (1) where y(t) is the vector of displacements at time t, F(t) is the vector of forces at each time interval, M, C, and K are the mass, damping, and stiffness matrices respectively, and ( · ) indicates the derivative with respect to time. Assuming that the excitation is a white noise input, it can be shown that the cross-correlation function between the vector of acceleration with a reference acceleration signal Rÿ ,ÿ i (τ ) is…”

“…Modal identification has been used for the verification of structural designs, [1][2][3][4] the study of the reliability of a structure to extreme dynamic loads such as earthquakes or hurricanes, 5 and it has been the focus of a large number of structural health monitoring (SHM) [6][7][8][9][10][11] and model updating techniques. In structural engineering, these dynamic parameters play an important role in the understanding of the dynamic behavior of bridges, building, and other structures.…”

“…In structural engineering, these dynamic parameters play an important role in the understanding of the dynamic behavior of bridges, building, and other structures. Modal identification has been used for the verification of structural designs, [1][2][3][4] the study of the reliability of a structure to extreme dynamic loads such as earthquakes or hurricanes, 5 and it has been the focus of a large number of structural health monitoring (SHM) [6][7][8][9][10][11] and model updating techniques. [12][13][14][15] These methodologies can be classified in input-output and output-only methods.…”

Vibration Control of a Long Span Cable-stayed Bridge Tower Using Pendulum Mass Damper

“…By applying the above Lagrange's equation to Eqn (2), the equation of motion of the damper can be written as follows. m (L 1 + L 2 ) 2 θ + C d θ + mg (L 1 + L 2 ) θ = 0 (4) The circular natural frequency of the TPMD, ω d , can be determined by…”