Steady‐State Vibration of Subway‐Soil‐Building System

Balendra, T.; Chua, Kian Ngiap; Lo, K. W.; Lee, S. L.

doi:10.1061/(asce)0733-9399(1989)115:1(145)

Cited by 67 publications

(20 citation statements)

References 5 publications

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“…Although recent advancements in computing technology are beginning to allow larger simulations to be undertaken in shorter time periods, such technology was not available for early numerical researchers. Therefore, authors such as [8] used two dimensional finite element method (FEM) models to investigate vibration from subways. Other researchers such as Hanazato et al [9] and Francois et al [10] attempted to combine the advantages of 2D and 3D models through the use of 2.5D models.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of ground borne vibrations from high speed rail lines on embankments

Connolly

Giannopoulos

Forde

2013

Soil Dynamics and Earthquake Engineering

212

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A three dimensional numerical model is presented capable of modelling the propagation and transmission of ground vibration in the vicinity of high speed railways. It is used to investigate the effect of embankment constituent material on ground borne vibration levels at various distances from the track.The model is a time domain explicit, dynamic finite element model capable of simulating non-linear excitation mechanisms. The entire model, including the wheel/rail interface is fully coupled. To account for the unbounded nature of the soil structure an absorbing boundary condition (infinite element) is placed at the truncated interfaces. To increase boundary absorption performance, the soil structure is modelled using an elongated spherical geometry.The complex geometries associated with the track components are modelled in detail thus allowing a highly realistic simulation of force transmission from vehicle to embankment. Lastly, quasi-static and dynamic excitation mechanisms of the vehicle locomotives are described using a multibody approach which is fully coupled to the track using non-linear Hertzian contact theory.The resulting model is verified using experimental ground borne vibration data from high speed trains, gathered through field trials. It is then used to investigate the role of embankments in the transmission of vibration. It is found that soft embankments exhibit large deflections and act as a waveguide for railway vibrations which are trapped within the structure. This results in increased vibration levels both inside the embankment and in the surrounding soil. In contrast it is found that embankments formed from stiffer material reduce vibrations in the near and far fields.

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Section: Introductionmentioning

confidence: 99%

Numerical modelling of ground borne vibrations from high speed rail lines on embankments

Connolly

Giannopoulos

Forde

2013

Soil Dynamics and Earthquake Engineering

212

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“…In component form equation (7) can be rewritten as u(') = u, + u1 and v(') = v, + v1 in which the scalar values of uo, vo, u, and v1 are Similarly the total stress field s(') at any point in the soil medium in terms of (ro, 8,) and (rl ,el) is obtained by substituting equation (6) 1. At the soil-foundation interface r,,…”

Section: Formulation Of the Problemmentioning

confidence: 99%

Dynamic response of buildings due to trains in underground tunnels

Balendra

Koh

1991

Earthq Engng Struct Dyn

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SUMMARYThe interaction of a tunnel-soil-building system due to trains is investigated by a substructure technnique. The soil medium is assumed to be a viscoelastic halfspace. The method of wave function expansion is used to construct the displacement fields in terms of potentials. The total soil-structure interaction problem is decomposed into a foundation radiation problem and a tunnel radiation problem. The impedance matrices for the corresponding substructure problems are obtained using a collocation technique. The steady state response of buildings for a given tunnel-foundation geometry is determined using the impedance matrix. Hence, the response of the building to train loading at different speeds is evaluated and compared with allowable vibration limits.

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“…The numerical method is a relatively mature method, including the finite difference method, finite element method, infinite element method, and boundary element method [15][16][17][18][19]. The finite element method is most commonly used, and its main advantage is that objects with complex geometries and boundary conditions can be simulated [20][21][22]. To reduce calculation time and eliminate the impact of artificial boundaries, the finite and infinite element methods can be combined, forming a 2.5-dimensional (2.5D) finite element model to simulate the ground vibration responses induced by moving loads [23].…”

Section: Introductionmentioning

confidence: 99%

Train-Induced Building Vibration and Radiated Noise by Considering Soil Properties

2020

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Constructing buildings above subway tracks exploits urban-area space intensively by adopting the three-dimensional overlapping development mode, which is one of the important measures for solving the contradictions among urban population increase, land resource shortage, and environmental protection. However, the vibration generated by the frequent train operations is transmitted to the upper buildings through the track structure and ground soil, which can cause structural vibrations and radiated noise and bring physical and mental side effects to occupants within the buildings. Subway projects are often located in geologically sensitive areas, while the influences of the encountered geological problems on the generation and propagation of structural vibration and structure-radiated noise within the buildings are not yet clear. Hence, this paper presents a method of studying the train-induced vibration transmission from the ground up into the buildings and the structure-radiated noise within the building. The method consists of a train-track model, track-soil-building model, and structure-radiated noise simulation. The impact of soil properties on the building vibration and structure-radiated noise is analyzed and ground-improvement measures are proposed in order to mitigate vibration and structure-radiated noise within buildings. The results show that the interaction between soil and structure has a great impact on vibration transmission from the ground into the building. Good foundations reduce vibration transmission from ground soil up into the building and lead to a lower level of structure-radiated noise. Ground improvements increase the impedance of ground soil, thereby weakening the vibration transmission and lowering the structure-radiated noise.

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Steady‐State Vibration of Subway‐Soil‐Building System

Cited by 67 publications

References 5 publications

Numerical modelling of ground borne vibrations from high speed rail lines on embankments

Numerical modelling of ground borne vibrations from high speed rail lines on embankments

Dynamic response of buildings due to trains in underground tunnels

Train-Induced Building Vibration and Radiated Noise by Considering Soil Properties

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