Reduction of metro vibrations by honeycomb columns under the ballast: Field experiments

Meng, Guang; Xu, X.; Chen, Q.S.; Wang, Y.

doi:10.1016/j.soildyn.2019.105913

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…Other types of isolators were also investigated. A kind of honeycomb Duxseal‐cement columns was applied to the Qingdao Metro Line 13 to reduce the vibration accelerations in three directions 20 . Zou et al explored the vibration isolation efficiency and the parameter sensitivity of various wave barriers for over‐track buildings 21 …”

Section: Introductionmentioning

confidence: 99%

“…A kind of honeycomb Duxseal-cement columns was applied to the Qingdao Metro Line 13 to reduce the vibration accelerations in three directions. 20 Zou et al explored the vibration isolation efficiency and the parameter sensitivity of various wave barriers for over-track buildings. 21 Comparing with the vertical vibrations induced by metro, the seismic performance of overtrack buildings in highintensity regions is also a big issue, especially for historical buildings.…”

Section: Introductionmentioning

confidence: 99%

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Experiment investigation and in situ test of hybrid vibration bearing system applied to overtrack historical buildings

Luo

Wei-hua

et al. 2022

Structural Contr & Hlth

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Summary The metro‐induced vibrations and seismic safety are both big issues for historical buildings in modern cities. This paper proposed a novel hybrid vibration bearing (HVB) to isolate horizontal earthquakes and mitigate vertical metro‐induced vibrations. The HVB consists of lead rubber bearing and thick rubber bearing with decoupled horizontal and vertical behaviors. The mechanical model of HVB is developed, and a new vertical stiffness formula of thick rubber bearing is proposed to calculate the compression stiffness, without conducting test. A static test of the prototype HVB and a dynamic experiment of an SDOF system were performed. The bearing has stable behavior under different pressures and lateral deformations. The bidirectional test confirmed the decoupling characteristics. The isolation design and retrofitting of an overtrack historical building was conducted. After retrofitting, the average maximum vibration level and the average subfrequency vibration level decreased 25% and 18%, respectively. The horizontal accelerations of isolated structure were 65% to 70% of the input, and the shear strains of bearings were smaller than 200% under rare earthquakes. Finally, case study of structures with different types of foundations is introduced. The vibration mitigation efficiency of different structures is confirmed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experiment investigation and in situ test of hybrid vibration bearing system applied to overtrack historical buildings

Luo

Wei-hua

et al. 2022

Structural Contr & Hlth

View full text Add to dashboard Cite

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“…Failure to treat vibrations due to traffic loads effectively will lead to immeasurable economic and scientific losses; therefore, it is very important to study the laws governing the propagation of vibration waves induced by traffic loads and propose vibration-reduction solutions. ere have been various previous studies of the characteristics of vibration waves induced by traffic loads and the main measures for alleviating the vibration intensity due to such loads [8][9][10][11][12][13][14][15]. Chen et al [16] studied the response characteristics of train vibration acceleration in seasonal frozen soil near Daqing in China.…”

Section: Introductionmentioning

confidence: 99%

Vibration-Isolation Performance of a Pile Barrier in an Area of Soft Soil in Shanghai

et al. 2020

Shock and Vibration

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Environmental vibration caused by traffic can affect the normal operation of precision instruments, and vibration-isolation measures should be taken to reduce such negative effects. The engineering background of this paper is a hard-X-ray tunnel under construction in Shanghai, China. First, field vibration measurements are used to study the characteristics of the ground traffic, maglev, subway, and other vibration sources near the tunnel, as well as the laws governing the propagation of vibration waves in the surface and soil layer. The finite-element modelling is then used to establish a two-dimensional numerical model for the field conditions, and the numerical results are compared with the field vibration measurements to validate the applicability of the numerical model for assessing the effects of environmental vibration. Finally, how the parameters of a pile-barrier vibration-isolation system, a vibration-isolation measure used widely for tunnels, influence its performance is studied. The results show the following: with increasing distance from the vibration source, the amplitude of the vibration acceleration decreases gradually, and the high-frequency part of the vibration wave is attenuated rapidly, whereas the low-frequency part is attenuated very little. The vibration-isolation effect of the pile barrier is directly proportional to the elastic modulus of the pile body, the pile length, and the hollow ratio of the pile, and inversely proportional to the stiffness of the filling material. The pile diameter, pile row number, and row spacing have little influence on the vibration-isolation effect. Increasing the pile diameter attenuates the acceleration amplitude somewhat around 10 Hz but has no effect on it around 5 Hz. Overall, the present numerical method is well suited to evaluating environmental vibration problems.

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Basement Design for Vibration Reduction of High-Rise Buildings under Metro Operation

Chen

Peng

Zeng³

et al. 2023

KSCE Journal of Civil Engineering

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Reduction of metro vibrations by honeycomb columns under the ballast: Field experiments

Cited by 5 publications

References 11 publications

Experiment investigation and in situ test of hybrid vibration bearing system applied to overtrack historical buildings

Experiment investigation and in situ test of hybrid vibration bearing system applied to overtrack historical buildings

Vibration-Isolation Performance of a Pile Barrier in an Area of Soft Soil in Shanghai

Basement Design for Vibration Reduction of High-Rise Buildings under Metro Operation

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