Showing papers by "Yong Xia published in 2010"
TL;DR: In this article, the Kron's substructuring method was proposed to compute the first-order derivatives of the eigenvalues and eigenvectors with respect to structural parameters.
Abstract: For large-scale structures, the calculation of the eigensolution and the eigensensitivity is usually very time-consuming. This paper develops the Kron\'s substructuring method to compute the firstorder derivatives of the eigenvalues and eigenvectors with respect to the structural parameters. The global structure is divided into several substructures. The eigensensitivity of the substructures are calculated via the conventional manner, and then assembled into the eigensensitivity of the global structure by performing some constraints on the derivative matrices of the substructures. With the proposed substructuring method, the eigenvalue and eigenvector derivatives with respect to an elemental parameter are computed within the substructure solely which contains the element, while the derivative matrices of all other substructures with respect to the parameter are zero. Consequently this can reduce the
computation cost significantly. The proposed substructuring method is applied to the GARTEUR AG-11 frame and a highway bridge, which is proved to be computationally efficient and accurate for calculation of the eigensensitivity. The influence of the master modes and the division formations are also discussed.
29 citations
TL;DR: In this article, the aerodynamic effect on the nonlinear oscillation, particularly parametric vibration of cables in cable-stayed bridges, is addressed, and the stability condition of the cable in terms of wind speed is derived.
Abstract: This paper addresses the aerodynamic effect on the nonlinear oscillation, particularly parametric vibration of cables in cable-stayed bridges. A simplified 2-DOF model, including a beam and a stayed cable, is formulated first. Response of the cable under global harmonic excitation which is associated with wind speed is obtained using the multiple scales method. Via numerical analysis, the stability condition of the cable in terms of wind speed is derived. The method is applied to a numerical example and a long-span bridge to analyze its all stay cables. It is demonstrated that very large vibration at one of the longest cables in the middle span of the bridge can be parametrically excited when the wind speed is over around 210 km/h (58.5 m/s).
4 citations
TL;DR: In this paper, a novel damage detection method is applied to a 3-story frame structure, to obtain statistical quantification control criterion of the existence, location and identification of damage.
Abstract: A novel damage detection method is applied to a 3-story frame structure, to obtain statistical quantification control criterion of the existence, location and identification of damage. The mean, standard deviation, and exponentially weighted moving average (EWMA) are applied to detect damage information according to statistical process control (SPC) theory. It is concluded that the detection is insignificant with the mean and EWMA because the structural response is not independent and is not a normal distribution. On the other hand, the damage information is detected well with the standard deviation because the influence of the data distribution is not pronounced with this parameter. A suitable moderate confidence level is explored for more significant damage location and quantification detection, and the impact of noise is investigated to illustrate the robustness of the method.
4 citations
Journal Article•
2 citations
01 Jan 2010
TL;DR: The 5th International Conference on Bridge Maintenance, Safety and Management (IABMAS 2010) as discussed by the authors was held in Philadelphia, PA, 11-15 July 2010, 11:15:15
Abstract: 5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010, Philadelphia, PA, 11-15 July 2010
2 citations
01 Jan 2010
2 citations
11 Mar 2010
TL;DR: The 12th International Conference on Engineering, Science, Construction, and Operations in Challenging Environments (ICSOCO) as mentioned in this paper was held in Honolulu, HI, 14-17 March 2010.
Abstract: 12th International Conference on Engineering, Science, Construction, and Operations in Challenging Environments - Earth and Space 2010, Honolulu, HI, 14-17 March 2010
2 citations
Journal Article•
2 citations
01 Jan 2010
2 citations
01 Dec 2010
TL;DR: The 5th International Conference on Bridge Maintenance, Safety and Management (IABMAS 2010) as discussed by the authors was held in Philadelphia, PA, 11-15 July 2010, 11:15:15
Abstract: 5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010, Philadelphia, PA, 11-15 July 2010