Investigations on train‐induced vibration and vibration control of an over‐track building using thick‐layer rubber bearings

2021 ◽  
Author(s):  
Ying Zhou ◽  
Kaiqiang Ma ◽  
Peng Chen ◽  
Decheng Lu ◽  
Hao Wu
Keyword(s):  
Vibration Control ◽  
Thick Layer ◽  
Rubber Bearings ◽  
Train Induced Vibration

Test of Thick Rubber Bearings on its Compressive Properties

2014 ◽  
Vol 919-921 ◽  
pp. 348-354 ◽  
Author(s):  
Hao Wen Chen ◽  
Peng Pan ◽  
Jun Cai Liu ◽  
Yu Sakurai ◽  
Masahiro Nakamura ◽  
...  
Keyword(s):  
Vibration Control ◽  
Steel Plates ◽  
Temperature Dependency ◽  
Test Results ◽  
Compressive Properties ◽  
Frequency Dependency ◽  
Current Design ◽  
High Damping Rubber ◽  
The Many ◽  
Rubber Bearings

Vibration is an important comfort issue for the metro surrounding buildings. Among the many methods of subway vibration control, building isolation is the necessary supplement to the track isolation for metro surrounding buildings with sensitive constructive forms or specific comfort needs. Laminated rubber bearings are widely used for the building isolation. In order to further improve the isolation effectiveness, researchers intend to use laminated rubber bearings with relatively thick rubber layers. However, the frequency dependency and temperature dependency are not well explored for the thick rubber bearings. And since constrains from the steel plates to rubber layers are relatively small for thick rubber bearings, its not clear if it is accurate to simply apply the equations for common laminated rubber bearings to the thick ones. In this paper, a compressive properties test is carried out for both thick and thin rubber bearings. Both thick and thin rubber bearings are manufactured by a kind of High Damping Rubber (HDR) and a kind of Nature Rubber (NR). The frequency dependency and temperature dependency are tested. The accuracy of applying the current design equations to thick rubber bearings is discussed based on the test results.

Vibration Control Performance of Damping Coupled Tuned Mass Dampers

2004 ◽  
Author(s):  
Nobuo Masaki ◽  
Hisashi Hirata
Keyword(s):  
Vibration Control ◽  
Natural Frequency ◽  
Tuned Mass Damper ◽  
Control Performance ◽  
Tuned Mass Dampers ◽  
Mass Unit ◽  
Optimal Value ◽  
Mass Damper ◽  
Rubber Bearings ◽  
Prefabricated Houses

Recently tuned mass dampers have been installed on three-story prefabricated houses for reducing of traffic-induced vibration and improving living comfort. This tuned mass damper consists of a mass unit, spring units and laminated rubber bearings. The mass is supported by four laminated rubber bearings, and spring units are used for adjusting the natural frequency of the tuned mass damper to the optimal value. Vibration control performance of this type of tuned mass dampers is deteriorated when the natural frequency of the house is changed. To solve this problem, the authors have developed a damping coupled tuned mass damper. In this type of tuned mass damper, two mass units having slightly different natural frequencies are coupled by using a damping unit. In this paper, mechanism and vibration control performance of the damping coupled tuned mass damper are described.

scholarly journals Simulation Study on Train-Induced Vibration Control of a Long-Span Steel Truss Girder Bridge by Tuned Mass Dampers

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Hao Wang ◽  
Tianyou Tao ◽  
Huaiyu Cheng ◽  
Xuhui He
Keyword(s):  
Vibration Control ◽  
Bridge Engineering ◽  
Dynamic Responses ◽  
Fe Method ◽  
Time Dynamic ◽  
Control Efficiency ◽  
Truss Bridges ◽  
Steel Truss ◽  
Steel Truss Bridges ◽  
Train Induced Vibration

Train-induced vibration of steel truss bridges is one of the key issues in bridge engineering. This paper talks about the application of tuned mass damper (TMD) on the vibration control of a steel truss bridge subjected to dynamic train loads. The Nanjing Yangtze River Bridge (NYRB) is taken as the research object and a recorded typical train load is included in this study. With dynamic finite element (FE) method, the real-time dynamic responses of NYRB are analyzed based on a simplified train-bridge time-varying system. Thereinto, two cases including single train moving at one side and two trains moving oppositely are specifically investigated. According to the dynamic characteristics and dynamic responses of NYRB, the fourth vertical bending mode is selected as the control target and the parameter sensitivity analysis on vibration control efficiency with TMD is conducted. Using the first-order optimization method, the optimal parameters of TMD are then acquired with the control efficiency of TMD, the static displacement of Midspan, expenditure of TMDs, and manufacture difficulty of the damper considered. Results obtained in this study can provide references for the vibration control of steel truss bridges.

Hybrid Vibration Control of Self-Anchored Cable-Stayed Suspension Bridge

2014 ◽  
Vol 919-921 ◽  
pp. 556-559
Author(s):  
Miao Feng
Keyword(s):  
Vibration Control ◽  
Time History ◽  
Suspension Bridge ◽  
Nonlinear Time History Analysis ◽  
Viscous Damper ◽  
History Analysis ◽  
Lead Rubber Bearings ◽  
Control Section ◽  
Rubber Bearings ◽  
Nonlinear Time History

Larger displacement and inter-force response of the structure will be produced when self-anchored cable-stayed suspension bridge in longitudinal earthquake. The optimized layout of viscous damper is done for self-anchored cable-stayed suspension bridge with the lead rubber bearings in the main tower, moreover, the nonlinear time-history analysis in the longitudinal seismic input be made. Comparing the analysis results above between the scheme with viscous damper and the scheme without isolation measures, analysis results show that inter-force and displacement of control section and control node are reduced greatly in hybrid vibration control.

scholarly journals Seismic Response Reduction of Megaframe with Vibration Control Substructure

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Jun-Qi Huang ◽  
Xun Chong ◽  
Qing Jiang ◽  
Xian-Guo Ye ◽  
Han-Qin Wang
Keyword(s):  
Vibration Control ◽  
Seismic Response ◽  
Element Model ◽  
Viscous Dampers ◽  
Lead Rubber Bearings ◽  
Standard Value ◽  
Rubber Bearings ◽  
Rare Earthquake ◽  
Tuning Frequency ◽  
Two Parameters

Megaframe with vibration control substructure (MFVCS) is a tuned mass damper system, which converts the substructures into the tuned mass. In this study, a kind of MFVCS using both lead-rubber bearings and viscous dampers to connect the vibration control substructure with the megaframe was proposed. Then, based on a validated finite element model, a parametric analysis was conducted to study the effect of two parameters, the tuning frequency (i.e., the frequency of the substructure) and the damping provided by the lead-rubber bearings and viscous dampers on the seismic response reduction of the MFVCS under both frequent and rare earthquakes (i.e., probability of exceedance of 63% and 2% in 50 years, resp.). Furthermore, the optimized values of these two parameters were achieved. The results indicated that (1) the proposed MFVCS could provide a considerable seismic response reduction under frequent earthquake and showed a strong robustness; (2) the optimized values of the frequency ratio (ratio of tuning frequency to the megaframe’s natural frequency) and damping scale factor (ratio between the investigated damping and a standard value) were 0.96 and 1.0, respectively; and (3) the seismic response reduction of the MFVCS under rare earthquake was lower than that under frequent earthquake.

Train-Induced Vibration Control of Simple Beams Using String-Type Tuned Mass Dampers

2007 ◽  
Vol 23 (4) ◽  
pp. 329-340 ◽  
Author(s):  
J.-D. Yau
Keyword(s):  
Vibration Control ◽  
Degrees Of Freedom ◽  
Tuned Mass Damper ◽  
Control Device ◽  
Frequency Condition ◽  
Railway Bridges ◽  
String Type ◽  
Mass Damper ◽  
Tuning Frequency ◽  
Train Induced Vibration

AbstractSince a long-term oscillation of a tuned mass damper (or TMD) in vibration control may impair the spring stiffness of the TMD, this phenomenon will directly down-tune the target frequency of the TMD. For this reason, this study intends to present a string-type tuned mass damper (or STMD) with an adjustable tuning frequency to mitigate the resonant response of a simple beam due to moving loads. The STMD device is installed inside the inner room of a bridge box girder and is composed of a distributed spring-dashpot-mass with a stretched string. Considering a linear beam-STMD model, a generalized two-degrees-of-freedom system is employed to determine the optimum tuning frequency condition and parameters of the STMD in vibration control. Compared with a traditional TMD device, the proposed STMD has the advantage of being adjustable in tuning frequency. From the numerical examples, the results indicate that the proposed STMD is a potential vibration control device in suppressing the train-induced vibration of railway bridges. Even though the tuning frequency of the STMD down-deviate from the target one by 10%, the control effectiveness of such a detuning STMD can still achieve about 90% as that of an optimal STMD by tuning its frequency to fit the optimum tuning frequency condition presented in this study.

Sign in / Sign up

Export Citation Format

Share Document