Frequency- and time-domain methods for the numerical modeling of full-bridge aeroelasticity

Salvatori, Luca; Borri, Claudio

doi:10.1016/j.compstruc.2007.01.023

Cited by 75 publications

(24 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In this paper, the quasi-steady theory for the self-excited forces is used to overcome this difficulty by assuming that the aerodynamic derivatives approach quasi-steady theory when the reduced frequency K goes to zero. This approach has also been used by Salvatori and Borri [3]and Øiseth et al [11]. As K goes to zero, the transfer function presented in Eq.…”

Section: Curve Fitting Rational Functions To the Aerodynamic Derivativesmentioning

confidence: 97%

“…The self-excited forces cause flutter, while both the self-excited and the buffeting forces are important for the dynamic response of bridges in strong winds. The multi-mode frequencydomain method has been widely used to study flutter stability and dynamic response to strong winds [1][2][3]. The method will provide results of high accuracy if there are no strong nonlinear characteristics in the system.…”

Section: Introductionmentioning

confidence: 99%

“…Modern bridge designs, however, are characterized by high flexibility and sensitivity to wind actions due to the increased span lengths. As a consequence, time-domain modelling of the selfexcited forces has received much attention in recent years [3][4][5][6][7][8][9][10][11][12][13][14][15]. One possibility is to use quasi-steady theory by modelling the self-excited forces using coefficients from static wind tunnel tests.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Prediction of long-term extreme load effects due to wind for cable-supported bridges using time-domain simulations

Yang

Øiseth

Næss

et al. 2017

Engineering Structures

View full text Add to dashboard Cite

Many long-span bridges that are slender and susceptible to wind-induced vibrations are currently under construction all over the world. As nonlinear structural behavior and nonlinear displacementdependent wind loads become of higher importance, time-domain methods are commonly applied instead of frequency-domain approaches. This paper discusses how rational functions, fitted to aerodynamic derivatives, can be converted to a state-space model to transform the frequencydependent aerodynamic forces into the time domain. A user element has been implemented in ABAQUS to include the self-excited forces in the dynamic analysis. The flutter stability limit and buffeting response of the Hardanger Bridge have been calculated in a comprehensive case study to illustrate the performance of the presented methodology. The Average Conditional Exceedance Rate method is used to estimate long-term extreme load effects. A simplified full long-term method that ignores wind velocities which contribute little to the long-term extreme values is introduced to reduce the required computational effort. The long-term predictions are also compared with results obtained using a short-term approach and it is concluded that the long-term extreme load effects are approximately 20% higher than the short-term extreme values.

show abstract

Section: Curve Fitting Rational Functions To the Aerodynamic Derivativesmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Prediction of long-term extreme load effects due to wind for cable-supported bridges using time-domain simulations

Yang

Øiseth

Næss

et al. 2017

Engineering Structures

View full text Add to dashboard Cite

show abstract

“…Despite the considerable progress made in the modeling of self-excited forces using rational or indicial functions (e.g. Cao and Sarkar, 2012;Caracoglia and Jones, 2003;Chowdhury and Sarkar, 2005;Costa, 2007;Costa and Borri, 2006;Salvatori and Borri, 2007;Zhang et al, 2011;Zhang and Chen, 2010;Øiseth et al, 2011, aerodynamic derivatives, as introduced in bridge engineering by Scanlan and Tomko (1971), remains the most common output from wind tunnel tests of bridges. The aerodynamic derivatives for a bridge cross-section can be determined by either forced or free vibration tests.…”

Section: Introductionmentioning

confidence: 99%

An enhanced forced vibration rig for wind tunnel testing of bridge deck section models in arbitrary motion

Siedziako

Øiseth

Rönnquist

2017

Journal of Wind Engineering and Industrial Aerodynamics

View full text Add to dashboard Cite

This paper presents a new experimental setup for the aerodynamic section model testing of bridge decks. The rig is designed to move a section model in arbitrary motion in a wind tunnel to imitate the motions of such scaled real bridge motion, step motion or random motion histories to be close to white noise. The proposed setup enables the forces acting on the section model to be measured directly while considering motions that resemble actual bridge motion and still fully utilizing the benefits of the forced vibration testing technique. The excellent performance of the system and testing procedure is proved by performing state-of-the-art forced vibration tests to extract 18 flutter derivatives of the Hardanger Bridge cross-section. The new experimental setup is further used to simulate a three-degree-of-freedom dynamic system driven by white noise to investigate whether the estimates of the aerodynamic derivatives are sensitive to the motion considered. The experimental results demonstrate that the estimates of the aerodynamic derivatives are not sensitive to the motion considered; these results indicate that the principle of superposition is fully applicable for the cross section as long as the motions are within the range considered.

show abstract

“…Flutter is generally studied within linearized aeroelastic models, which can provide the range of wind speeds where Hopf bifurcation occurs. To consider the effects due to the unsteadiness of the relative motion between the section and the air flow, indicial Theodorsen type [14][15][16] formulations can be adopted to predict more accurately the critical wind speed at the onset of the flutter instability [17] with respect to the quasi-steady formulation. The equations of motion for suspension bridges were employed for aeroelastic investigations in [18], where analysis were centered on experimentally determined flutter derivatives, and a full threedimensional modal analysis of the structure.…”

Section: Introductionmentioning

confidence: 99%

Stability of dynamic response of suspension bridges

Curnis

Ardito

Guerrieri

2017

Journal of Sound and Vibration

View full text Add to dashboard Cite

show abstract

Frequency- and time-domain methods for the numerical modeling of full-bridge aeroelasticity

Cited by 75 publications

References 14 publications

Prediction of long-term extreme load effects due to wind for cable-supported bridges using time-domain simulations

Prediction of long-term extreme load effects due to wind for cable-supported bridges using time-domain simulations

An enhanced forced vibration rig for wind tunnel testing of bridge deck section models in arbitrary motion

Stability of dynamic response of suspension bridges

Contact Info

Product

Resources

About