Vibration characteristics of damping pad floating slab on the long-span steel truss cable-stayed bridge in urban rail transit

Liang, Lin; Li, Xiaozhen; Yin, Jun; Wang, Dangxiong; Gao, Wei; Guo, Zhen

doi:10.1016/j.engstruct.2019.04.032

Cited by 59 publications

(30 citation statements)

References 16 publications

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“…The vertical dynamic stiffness of a bridge is much higher than that of the track. From [29], it is found that the receptance of the track does not change significantly whether the bridge is considered or not. In computing the track receptances the bridge is therefore simplified as a rigid foundation below the track; the rail is discretely supported by the fastener-sleeper-ballast system, as shown in…”

Section: Track Receptancementioning

confidence: 99%

Investigation of train-induced vibration and noise from a steel-concrete composite railway bridge using a hybrid finite element-statistical energy analysis method

Liu

Thompson

Peipei

et al. 2020

Journal of Sound and Vibration

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In this study a hybrid finite element-statistical energy analysis (FE-SEA) method is used to investigate the structure-borne noise of a steel-concrete composite railway bridge. The rail is represented by an infinite Timoshenko beam connected to the sleepers which are regarded as finite Timoshenko beams supported in ballast.The fasteners and ballast are simplified as a series of springs with complex stiffness. This model allows the receptance of the track to be determined. The wheel-rail forces are computed in the frequency domain from the contact-filtered roughness and the receptances of the wheel, track, and contact. The forces transmitted to the bridge are determined by substituting the wheel-rail forces into the equation of motion for the track. This model could also be applied to a slab track mounted on a bridge. A hybrid FE-SEA method is introduced in which FE is used to model the concrete deck and SEA is used to model the steel girders. This enables the computation of the vibration and noise of the composite railway bridge. The proposed method is verified by comparing its predictions with field measurements. The structure-borne noise level of the bridge is found to increase with train speed v by approximately 20lg(v). It is shown that the adjacent spans in a multi-span bridge can be ignored in deriving the bridge-borne noise at receiver points in the middle of the main span, provided that the distance to the track centreline is less than 0.3 times the length of the main span.

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Section: Track Receptancementioning

confidence: 99%

Investigation of train-induced vibration and noise from a steel-concrete composite railway bridge using a hybrid finite element-statistical energy analysis method

Liu

Thompson

Peipei

et al. 2020

Journal of Sound and Vibration

Self Cite

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“…Usually the double beam system can be divided into the upper beam and lower beam, where the parallel beams are connected continuously by a viscoelastic layer or discretely by a series of supporting units. Taking the railway slab track as an example, the rail can be regarded as the upper beam and the slab as the lower beam [3,4]. For the embankment structures, the pavement structure can be treated as an upper beam, and the geo-cell reinforced layer idealized as the lower beam [5].…”

Section: Introductionmentioning

confidence: 99%

Connection Damage Detection of Double Beam System under Moving Load with Genetic Algorithm

Zhang

Song

Yang

et al. 2021

mech

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In this paper, a novel damage detection approach for the spring connection of the double beam system using the dynamic response of the beam and genetic algorithm is presented. The double beam system is regarded as both Bernoulli-Euler beams with simply supported ends, the upper and lower beams are connected by a series of linear springs with certain intervals. With the genetic algorithm, the dynamic acceleration response of double beam system under moving load, which can be solved by the Newmark-β integration procedure, is used as the input data to detect the connection damage. Thus the dynamic response of the double beam system with a certain damage pattern can be calculated employing the moving load model. If the calculated result is quite close to the recorded response of the damaged bridge, this damage pattern will be the solution. The connection damage detection process of the proposed approach is presented herein, and its feasibility is studied from the numerical investigation with simple and multiple damages detection. It is concluded that the sophisticated damage conditions need much longer time to detect successfully.

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“…Huang et al built a vehicle-track coupled dynamic system and investigated how the parameters of the floating-slab track and the train's speed influence the vehicletrack coupling system [15]. Liang et al investigated the vibration characteristics of the damping-pad floating slab on the long-span steel-truss cable-stayed bridge in urban rail transit by developing a theoretical model of the train-track-bridge coupling interaction in the frequency domain [16]. Lu et al established a vehicle-track dynamic interaction model to investigate the wheel-rail interaction characteristics of the steelspring floating-slab track and carried out the dynamic analysis between the subway vehicle and the steel-spring floating-slab track under emergency braking conditions [17].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Prefabricated Steel‐Spring Floating‐Slab Track and Its Application to Urban Express Rail Transit

Huang

Ping

Luo

et al. 2020

Advances in Civil Engineering

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The aim of the research is the design of prefabricated steel-spring floating-slab track to be applied in urban express rail transit systems. Using a developed vehicle-track dynamic-coupling equation for steel-spring floating-slab track, the effects of length, thickness, vertical damping, and use of side-mounted isolators on the floating-slab track were investigated experimentally using full-scale model and under different working conditions. The finding of the study revealed the following: (1) The prefabricated steel-spring floating-slab track can be applied to urban express rail transit, because it meets the requirements of high-speed transit while efficiently reducing noise. (2) The floating-slab track’s stability slightly increases with the increase of its length and thickness. As thickness increases, vertical displacement of the rail increases slightly, and lateral stability increases, thereby slightly improving the vehicle’s running stability. (3) When the intercity electric multiple-unit train travels along the prefabricated steel-spring floating-slab-track bed at different speeds, the wheel-axle lateral force, wheel-rail vertical force, the derailment coefficient, the wheel-weight reduction rate, and the lateral acceleration of the vehicle body are all less than the specified limits of Chinese code, thus fully meeting the safety requirements of train operation. (4) Appropriately increasing the vertical-support damping of the floating slab can improve the vehicle’s vertical dynamic performance, reduce the vertical displacement of the rail, and lower the vibration response of the floating slab. (5) Adding side-mounted vibration isolators at the joint of the floating slab could greatly improve the stability of the floating slab itself and appropriately reduce the vehicle’s vertical vibration response. Due to the optimization and establishment of relevant factors influencing the performance of prefabricated steel-string floating-slab track achieved in the study, the results obtained are particularly useful for setting safety, comfort, and stability requirements of the floating slab.

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Vibration characteristics of damping pad floating slab on the long-span steel truss cable-stayed bridge in urban rail transit

Cited by 59 publications

References 16 publications

Investigation of train-induced vibration and noise from a steel-concrete composite railway bridge using a hybrid finite element-statistical energy analysis method

Investigation of train-induced vibration and noise from a steel-concrete composite railway bridge using a hybrid finite element-statistical energy analysis method

Connection Damage Detection of Double Beam System under Moving Load with Genetic Algorithm

Performance Analysis of Prefabricated Steel‐Spring Floating‐Slab Track and Its Application to Urban Express Rail Transit

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