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Appl. Sci. 2017, 7(4), 395; doi:10.3390/app7040395

Parametric Sensitivity Analysis on the Buffeting Control of a Long-Span Triple-Tower Suspension Bridge with MTMD

1
Key Laboratory of C&PC Structures of Ministry of Education, Southeast University, Nanjing 210096, China
2
School of Civil Engineering, Southeast University, Nanjing 210096, China
3
School of Civil Engineering, Central South University, Changsha 410075, China
*
Author to whom correspondence should be addressed.
Academic Editor: Alkiviadis Paipetis
Received: 7 February 2017 / Revised: 26 March 2017 / Accepted: 12 April 2017 / Published: 14 April 2017
(This article belongs to the Section Energy)

Abstract

The long-span triple-tower suspension bridge is a brand-new type of structural form with typical wind-sensitive features. Inevitable wind-induced vibrations will heavily influence the driving comfort during strong winds and shorten the fatigue life of the bridge structure, which highlights the demand for the mitigation of wind-induced vibrations of long-span bridges. In this study, a parametric analysis is performed to investigate the control effect of multiple tuned mass dampers (MTMD) on the buffeting responses of a long-span triple-tower suspension bridge. Taking Taizhou Bridge as an example, the buffeting analysis is conducted via the finite-element-based approach. A step-updating framework is presented to guide the parametric analysis and determine the preferred values of the mechanical parameters of the MTMD. Specifically, four parameters—including the number of TMDs, the mass ratio, the damping ratio, and the frequency bandwidth ratio—are included in the parametric analysis. The robustness of the MTMD is also evaluated by changing another parameter called the frequency ratio. It is found that the performance of the MTMD is sensitive to the variation of the four parameters and the robustness can be adjusted by increasing the frequency bandwidth ratio. Utilizing the MTMD with reasonable mechanical parameters, the buffeting responses of the long-span triple-tower suspension bridge under strong winds can be effectively mitigated. View Full-Text
Keywords: triple-tower suspension bridge; buffeting; vibration control; multiple tuned mass dampers (MTMD); finite element analysis triple-tower suspension bridge; buffeting; vibration control; multiple tuned mass dampers (MTMD); finite element analysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Tao, T.; Wang, H.; Yao, C.; He, X. Parametric Sensitivity Analysis on the Buffeting Control of a Long-Span Triple-Tower Suspension Bridge with MTMD. Appl. Sci. 2017, 7, 395.

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