The Analysis of Stayed Cable Wind-Induced Vibration Morphology and Damping Measures

2014 ◽  
Vol 501-504 ◽  
pp. 1174-1177
Author(s):  
Xiao Ming Du ◽  
Nan Li
Keyword(s):  
Time Effect ◽  
Stay Cable ◽  
Main Bearing ◽  
Cable Vibration ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Stay Cables ◽  
Long Span Bridge ◽  
Long Time ◽  
Wind Induced Vibration

The stayed cable is the key part of the cable-stayed bridge and the main bearing section. Stay cables are prone to vibration under the loads of the rains winds, earthquakes and transportation for the long-span bridge is very flexible and the damping is small. A long time effect of cable vibration on the structure durability has become a serious problem of cable-stayed bridge in the development and operation. Wind induced vibration of stay cable shape is analyzed, and some common damping measures are expounded in the article and it provides the basis for further study in the future.

scholarly journals Serviceability Assessment Method of Stay Cables with Vibration Control Using First-Passage Probability

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Seunghoo Jeong ◽  
Young-Joo Lee ◽  
Sung-Han Sim
Keyword(s):  
Vibration Control ◽  
Control Method ◽  
Principal Component ◽  
Assessment Method ◽  
Stay Cable ◽  
First Passage ◽  
Long Span Bridges ◽  
Long Span ◽  
Stay Cables ◽  
Cable Stayed Bridges

As the construction of long-span bridges such as cable-stayed bridges increases worldwide, maintaining bridge serviceability and operability has become an important issue in civil engineering. The stay cable is a principal component of cable-stayed bridges and is generally lightly damped and intrinsically vulnerable to vibration. Excessive vibrations in stay cables can potentially cause long-term fatigue accumulation and serviceability issues. Previous studies have mainly focused on the mitigation of cable vibration within an acceptable operational level, while little attention has been paid to the quantitative assessment of serviceability enhancement provided by vibration control. This study accordingly proposed and evaluated a serviceability assessment method for stay cables equipped with vibration control. Cable serviceability failure was defined according to the range of acceptable cable responses provided in most bridge design codes. The cable serviceability failure probability was then determined by means of the first-passage problem using VanMarcke’s approximation. The proposed approach effectively allows the probability of serviceability failure to be calculated depending on the properties of any installed vibration control method. To demonstrate the proposed method, the stay cables of the Second Jindo Bridge in South Korea were evaluated and the analysis results accurately reflected cable behavior during a known wind event and show that the appropriate selection of vibration control method and properties can effectively reduce the probability of serviceability failure.

scholarly journals COUPLING OF CABLE VIBRATION AND ITS DAMPING EFFECT IN LONG-SPAN CABLE-STAYED BRIDGE: THE TATARA BRIDGE

2004 ◽  
pp. 309-323 ◽  
Author(s):  
Hiroki YAMAGUCHI ◽  
Toru FUJIWARA ◽  
Kazunori YAMAGUCHI ◽  
Yasunao MATSUMOTO ◽  
Kazuhiko TSUTSUMI
Keyword(s):  
Cable Vibration ◽  
Damping Effect ◽  
Cable Stayed Bridge ◽  
Long Span

Dynamic Characteristics of Steel Stay Cable in Civil Engineering Using Field Testing

2013 ◽  
Vol 634-638 ◽  
pp. 2770-2773
Author(s):  
Chern Hwa Chen ◽  
Yuh Yi Lin
Keyword(s):  
Civil Engineering ◽  
Slenderness Ratio ◽  
Damping Ratio ◽  
Field Testing ◽  
Dynamic Responses ◽  
Ambient Vibration ◽  
Stay Cable ◽  
Flexural Stress ◽  
Cable Stayed Bridge ◽  
Stay Cables

The stay cables in civil engineering are one of the most difficult components to maintain for the safety of bridge after it is open for traffic, as the slenderness ratio is large, and they are flexible, low in damping ratio and less resistant to bending. It is possible that the cable snaps under large cyclic flexural stress due to wind-induced motion, regular traffic or even ambient vibration. The loosening seal of stay cables, damaged anchors, and tendon corrosion due to damaged protection sleeve at the root will undermine dramatically the life of cable-stayed bridge and even its safety. In this paper, the field test used to determine dynamic responses for stayed cable of the bridge in civil engineering. The practice formula is used to determine the cable forces of the Kao Ping Hsi cable-stayed bridge (the largest cable-stayed bridge in Taiwan). The results obtained herein indicate that such analysis is valid and rational, and may be used to monitor the safety of cable-stayed bridge.

A Vibration Exciter for Evaluating Cable Damping of a Cable-Stayed Bridge

2008 ◽  
Vol 56 ◽  
pp. 206-211
Author(s):  
Jae Min Kim ◽  
Jong Jae Lee ◽  
Sang Sup Ahn ◽  
Jun Seong Choi
Keyword(s):  
Field Tests ◽  
Processing Technique ◽  
Image Processing Technique ◽  
Vibration Exciter ◽  
Stay Cable ◽  
Mr Dampers ◽  
Digital Image Processing Technique ◽  
Cable Stayed Bridge ◽  
Stay Cables ◽  
Acceleration Data

It is necessary to accurately estimate the dynamic characteristics of stay cables, especially damping ratios, to design cable damper for appropriate vibration mitigation of a cable-stayed bridge in service. In this study, a vibration exciter has been developed to evaluate the cable damping of a cable-stayed bridge. The feasibility of the developed system was verified through field tests on a 100m long stay cable. The damping ratios of the stay cable were estimated based on acceleration data as well as displacement data measured by digital image processing technique. The performance of the passively operated MR dampers with the different voltage inputs were investigated by comparing the estimated damping ratios.

scholarly journals Applicability of Partially Anchored Cable-Stayed Bridge to Long-Span Bridge.

1995 ◽  
pp. 113-124
Author(s):  
Suguru Kaneko ◽  
Takeshi Nakayama ◽  
Tathuo Mukoyama ◽  
Tathushi Iwaki ◽  
Saeko Takekawa
Keyword(s):  
Cable Stayed Bridge ◽  
Long Span ◽  
Long Span Bridge

The Influence of Turbulence Integral Scale to Buffeting of Long-Span Bridge

2011 ◽  
Vol 105-107 ◽  
pp. 9-12 ◽  
Author(s):  
Yi Qing Xiao ◽  
Gang Hu ◽  
Meng Qi Tu ◽  
Rui Qi Zheng
Keyword(s):  
Wind Speed ◽  
Suspension Bridge ◽  
Numerical Results ◽  
Integral Scale ◽  
Wind Speeds ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Integral Scales ◽  
Long Span Bridge ◽  
Peak Value

In this paper, the influence of turbulence integral scale to buffeting responses of long-span bridge is analyzed by adopting 2-D buffeting theory. One cable-stayed bridge and one suspension bridge are selected as analysis object. Buffeting responses are calculated under two different wind speeds and different size of turbulence integral scales, which range from 10m to 80m in this paper. The numerical results show that buffeting responses do not change with turbulence integral scale linearly and when turbulence integral scale increases to one value, buffeting responses reach a peak. In addition, turbulence integral scale corresponding to peak value of buffeting responses rise with growth of wind speed.

scholarly journals Review on the Impact of Elements Used During Bridge Construction

2021 ◽  
pp. 19-22
Author(s):  
Nikhil Kumar Singh ◽  
Jyoti Yadav
Keyword(s):  
High Strength ◽  
Dynamic Effects ◽  
Earthquake Loads ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Long Span Bridge ◽  
Cable Stays ◽  
The Impact ◽  
Innovative Techniques ◽  
Cable Stayed Bridges

The requirement of long span bridge is increase with development of infrastructure facility in every nation. Long span bridge could be achieved with use of high strength materials and innovative techniques for analysis of bridge. Generally, cable-supported bridges comprise both suspension and cable-stayed bridges. Cable-supported bridges are very flexible in behavior. These flexible systems are susceptible to the dynamic effects of wind and earthquake loads. The cable-stayed bridge could provide more rigidity due to the presence of tensed cable stays as a force resistance element.

Suppression of Vibrations Induced by Fluctuating Wind for Long-Span Cable-Stayed Bridge Using MR Dampers

2019 ◽  
Vol 24 (2) ◽  
pp. 262-270
Author(s):  
Zhao-Dong Xu ◽  
Meng Xu ◽  
Da-Huan Jia
Keyword(s):  
Optimal Control ◽  
Control Strategy ◽  
State Control ◽  
Optimal Control Strategy ◽  
Box Girder ◽  
Mr Dampers ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Wind Induced Vibration ◽  
Fluctuating Wind

Cable-stayed bridges subjected to wind excitations will cause intense vibration due to their high flexibility in characteristic. Employment of magnetorheological (MR) dampers to realize the vibration smart-control of cablestayed bridges has become a considerable research topic in recent decades. In this paper, the plane truss finite element model (FEM) of a cable-stayed bridge with MR dampers is established. Fluctuating wind field is generated using the weighted amplitude wave superposition (WAWS) method and Kaimal spectrum, and then the time-history sample curve of wind speed is obtained. Fluctuating wind-induced vibration of the long-span cable-stayed bridge installed with MR dampers is analyzed by linear quadratic regulator (LQR) classical optimal control strategy and LQR tri-state control strategy. After the optimal control force is calculated by LQR classical optimal control strategy, control parameters and the input currents of MR dampers can be determined according to the windinduced vibration by LQR tri-state control. Results show that longitudinal and vertical wind-induced vibration responses of the box girder of the cable-stayed bridge are reduced obviously when MR dampers are arranged between the box girder and pylons.

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