Wind Engineering on the New Millennium Bridge in South Korea

Kim, Y.M.; Kwak, Young-Hak; Choi, Min-Seon; Lee, J.J.; Cho, K.S.

doi:10.1016/j.proeng.2011.07.185

Cited by 5 publications

(4 citation statements)

References 0 publications

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“…The last numerical example is to consider the New Millennium bridge, an asymmetric model of cable-stayed bridge with a main span of 510.0 m. The wind-tunnel tests of the section model and (Kim et al, 2010). The structure is modeled by a three-dimensional framework with a total of 656 nodes, 772 elements (space beams, cables, and rigid links) and 279 nodal masses (Fig.…”

Section: Flutter Analysis Using the Experimental Flutter Derivativesmentioning

confidence: 99%

“…11(e), wherein the flutter prediction is at U f3 = 180.63 m/s and ω f3 = 4.824 rad/s. Table 9 shows a comparison of the flutter wind velocity and the critical frequency predicted by the present method, the Ding et al (2002) method, and the aeroelastic full model test for the bridge in service stage (Kim et al, 2010). Comparing the first 2 modes, the combination of fundamental modes of the modes 1, 13 or modes 1, 2, 13 with the first 30 modes results, the contribution of the first symmetric vertical bending mode may not affect the critical flutter velocity; meanwhile, the first symmetric lateral bending mode plays an important role in generating the coupled flutter.…”

Section: Flutter Analysis Using the Experimental Flutter Derivativesmentioning

confidence: 99%

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Coupled flutter analysis of long-span bridges using full set of flutter derivatives

Kim

Lee³

2015

KSCE J Civ Eng

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A convenient and effective finite element-based method for coupled flutter analysis of long-span bridges is presented. The exact formulation of the aerodynamic self-excited forces with eighteen flutter derivatives utilized by complex notation is proposed. The predictions of the flutter wind speed and the critical frequency are compared with those either given by existing methods or the wind tunnel test showing the effectiveness and accuracy of the present approach. Numerical flutter analysis for an asymmetric bridge is the application for engineering practice, and its obtained results highlight the important role of the first lateral bending and torsional mode in generating the coupled flutter. Multi-mode analyses that are based on only the symmetrical modes can predict accurately the bridge flutter onset. The consistent self-excited aerodynamic force formulations produce the flutter velocity that is closer to the experimental one of full-bridge model in the wind tunnel.

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Section: Flutter Analysis Using the Experimental Flutter Derivativesmentioning

confidence: 99%

Section: Flutter Analysis Using the Experimental Flutter Derivativesmentioning

confidence: 99%

Coupled flutter analysis of long-span bridges using full set of flutter derivatives

Kim

Lee³

2015

KSCE J Civ Eng

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“…6). The wind-tunnel tests of the section model and full (Kim et al 2010). A constant modal damping ratio of critical ζ = 0.34% is suggested for the section model tests.…”

Section: An Engineering Application For Aerodynamic Instability Analymentioning

confidence: 99%

“…10 for the case of the multi-mode flutter analysis, which is based on the first 30 modes of this structure. Table 7 shows a comparison of the flutter wind velocity and critical frequency predicted by both analysis I, analysis II and the Ding et al, methods (2002) with those measured from the aeroelastic full model test for the bridge in service stage (Kim et al 2010). The use of the multi-mode flutter analysis procedure based on analysis II predicts the flutter speed of 82.11 m/s and critical frequency of 2.142 rad/s, which are in good agreement with other methods and the value of the flutter speed is also very close to the experimental result.…”

Section: An Engineering Application For Aerodynamic Instability Analymentioning

confidence: 99%

Nonlinear analysis of cable-supported structures with a spatial catenary cable element

Lee²,

Bui

2012

Structural Engineering and Mechanics

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This paper presents a spatial catenary cable element for the nonlinear analysis of cablesupported structures. An incremental-iterative solution based on the Newton-Raphson method is adopted for solving the equilibrium equation. As a result, the element stiffness matrix and nodal forces are determined, wherein the effect of self-weight and pretension are taken into account. In the case of the initial cable tension is given, an algorithm for form-finding of cable-supported structures is proposed to determine precisely the unstressed length of the cables. Several classical numerical examples are solved and compared with the other available numerical methods or experiment tests showing the accuracy and efficiency of the present elements.

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