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CLC number: U448.25

On-line Access: 2014-10-08

Received: 2014-07-04

Revision Accepted: 2014-09-17

Crosschecked: 2014-09-25

Cited: 3

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Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2014 Vol.15 No.10 P.798-812

http://doi.org/10.1631/jzus.A1400194


A simulation study on the optimal control of buffeting displacement for the Sutong Bidge with multiple tuned mass dampers*


Author(s):  Hao Wang, Tian-you Tao, Huai-yu Cheng, Ai-qun Li

Affiliation(s):  . Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Nanjing 210096, China

Corresponding email(s):   wanghao1980@seu.edu.cn

Key Words:  Long-span cable-stayed bridge, Buffeting response, Vibration control, Multiple tuned mass dampers (MTMDs), Control efficiency


Hao Wang, Tian-you Tao, Huai-yu Cheng, Ai-qun Li. A simulation study on the optimal control of buffeting displacement for the Sutong Bridge with multiple tuned mass dampers[J]. Journal of Zhejiang University Science A, 2014, 15(10): 798-812.

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doi="10.1631/jzus.A1400194"
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T1 - A simulation study on the optimal control of buffeting displacement for the Sutong Bridge with multiple tuned mass dampers
A1 - Hao Wang
A1 - Tian-you Tao
A1 - Huai-yu Cheng
A1 - Ai-qun Li
J0 - Journal of Zhejiang University Science A
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1400194


Abstract: 
The buffeting of long-span cable-supported bridges under strong winds is one of the key issues in bridge wind engineering. In order to study the effectiveness of the multiple tuned mass dampers (MTMDs) in buffeting control of long-span bridges, the Sutong Cable-stayed Bridge (SCB) with a main span of 1088 m in China is taken as an example in this paper. The spatial finite element model of the SCB is established and the modal analysis is conducted based on ANSYS. After the 3D turbulence wind field of the SCB is simulated using the measured wind parameters, the time-domain buffeting analysis on the SCB is conducted with the aerodynamic self-excited forces included. According to the dynamic characteristics and the time-domain buffeting analysis results of the SCB, the parameter sensitivity analysis on buffeting vibration control with MTMD is conducted in ANSYS. The optimum parameters are then obtained with the construction difficulty and economic factors considered. Results show that the control efficiency is sensitive to the number of the TMD, mass ratio, frequency band-width ratio, and damping ratio. Both the vertical and the lateral vibrations can be effectively controlled when proper design parameters of a MTMD system are used. In addition, the control effect on lateral vibration is better than that on vertical vibration. Results obtained in this study can provide references for anti-wind design and buffeting control of long-span cable-stayed bridges.

基于多重调谐质量阻尼器的苏通大桥抖振位移最优控制的数值模拟

研究目的:为超大跨度斜拉桥抗风设计与抖振控制提供参考。
研究方法:基于ANSYS建立了苏通大桥三维有限元模型,并在MATLAB平台模拟了苏通大桥三维脉动风场。考虑主梁断面气动自激力,进行了苏通大桥抖振时域分析。根据苏通大桥动力特性和抖振时域分析结果,重点分析了多重调谐质量阻尼器(MTMD)用于抖振控制的参数敏感性。考虑MTMD的控制效果、建造费用、施工难度及鲁棒性等因素建立了关于MTMD设计参数的目标函数,并基于一阶优化算法进行目标函数最优解的非线性搜索,据此获得了MTMD在约束条件下的最优设计参数。
重要结论:1. 苏通大桥侧向抖振位移主要由第一阶侧弯振型控制,竖向抖振位移主要由第一阶竖弯振型控制;2. MTMD的控制效果对设计参数的变化十分敏感,其中质量比和频带宽敏感性更强;3. MTMD的最优设计参数可以通过一阶优化算法获得,并可通过零阶优化算法对优化结果进行验证;4. 采用优化后的MTMD设计参数,苏通大桥的抖振响应可以得到明显抑制,且侧向抖振控制效果更加明显。
大跨斜拉桥;抖振响应;振动控制;多重调谐质量阻尼器(MTMD);控制效果;优化算法

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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