Three‐Dimensional Dynamic Response of Twin Cavities due to Traveling Loads

Guan, Fenhai; Moore, Ian D.

doi:10.1061/(asce)0733-9399(1994)120:3(637)

Cited by 21 publications

(13 citation statements)

References 4 publications

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“…e finite element method was widely used to study the tunnel vibration response [11][12][13]. Because both finite element and boundary element have their own advantages in dealing with lining structure and infinite soil, Peng et al [14,15] carried out numerical simulation for the underlying concrete structure of tunnel under the impact load of train vibration with the nonlinear dynamic finite element theory and predicted the service life of the underlying structure by using the Tepfers concrete singlelogarithmic fatigue equation.…”

Section: Introductionmentioning

confidence: 99%

Study on Structural Service Performance of Heavy-Haul Railway Tunnel with Voided Base

Zhang

Zeng

Dai

et al. 2018

Advances in Civil Engineering

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The structural design of heavy-haul railway tunnels still follows the design method of ordinary railway tunnels. Most of them do not take into account the influence of large axle load of 30 t or more, let alone such problems as void of surrounding rock under long-term dynamic loads. In order to analyze the dynamic response of heavy-haul railway tunnels under long-term reciprocating cyclic dynamic loads, considering the factors such as axle load of vehicle body, unsprung mass, and track irregularity, the vibration load time-history curve of heavy-haul railway trains is determined, the three-dimensional dynamics coupling model of dynamic load-tunnel-surrounding rock is established, and the fatigue life of the structure under different void conditions is analyzed based on the S-N curve of concrete. According to the study, the loading, unloading, and vibration caused by train passing will lead to fluctuations in the vertical displacement response of the monitoring point. The peaks and valleys of the response time-history curve correspond to the effect of the train wheels rolling through. When the void is 6 m wide and 10 cm thick, the vertical displacement of the inverted arch is increased by about 9 times, the peak velocity of the inverted arch is increased by about 3.8 times, and the maximum principal stress is increased by about 47.3%, compared with the condition without void. With the same void thickness, the vertical displacement and velocity curves of the inverted arch vary significantly with the increase of the void width. The width of the base void has a significant effect on the fatigue life of the structure of heavy-haul railway tunnels. Based on the operation requirement of 100-year service life, the ultimate void width is 2 m.

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Section: Introductionmentioning

confidence: 99%

Study on Structural Service Performance of Heavy-Haul Railway Tunnel with Voided Base

Zhang

Zeng

Dai

et al. 2018

Advances in Civil Engineering

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“…The dynamic responses of a cylindrical tunnel due to traveling loads are based on analytical approaches which were analyzed by Datta et al 8 and Guan and Moore. 9 Most of the model tests, especially centrifuge tests, were conducted to understand the effects of seismic loading on the dynamic behavior of tunnels. [10][11][12] It should be noted that only limited experimental research has been carried out directly to apply dynamic train loads on tunnel tracks 13 and railways.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on dynamic response of model shield tunnel induced by moving-axle loads of subway train

Zhang

et al. 2018

International Journal of Distributed Sensor Networks

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A new testing method was introduced to apply moving-axle loads of a subway train on a track structure. In order to investigate the dynamic responses of the shield tunnel subjected to moving-axle loads, a series of laboratory model tests were conducted in a 1/40 scale model tunnel. The influences of the axle load, the wheel speed, and the cover depth of the shield tunnel on the vertical displacement and acceleration of the lining were presented and discussed. Parametric studies revealed that the vertical displacement-time history of the lining presents a ''W'' shape due to the combined action of two axles of a bogie. The peak value of the vertical displacement increased with the axle load linearly, while it decreased with the increase in the cover depth. Moreover, response time of the displacement decreased with the increase in the wheel speed, but the peak values remained stable at the same level. Finally, a three-dimensional dynamic finite element model was adopted to simulate the movement of the axle loads and calculate the responses of the lining. The numerical results analysis agrees well with experimental results.

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“…Luco and de Barros [8,9] studied the seismic response of a cylindrical shell embedded in a layered viscoelastic half space using a technique that 2 Journal of Engineering combined an indirect integral representation for the exterior domain with a simplified shell theory for tunnel representation. Guan and Moore [10] studied the dynamic response of multiple cavities deeply buried in a viscoelastic medium that were subjected to moving or seismic loading using the Fourier-Bessel series. Bayıroglu [11] studied the dynamic response of an elastic half space with a circular cylindrical shell using the finite element method.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response of a Circular Tunnel in an Elastic Half Space

Coşkun

Dolmaseven

2017

Journal of Engineering

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The vibration of a circular tunnel in an elastic half space subjected to uniformly distributed dynamic pressure at the inner boundary is studied in this paper. For comparison purposes, two different ground materials (soft and hard soil) are considered for the half space. Under the assumption of plane strain, the equations of motion for the tunnel and the surrounding medium are reduced to two wave equations in polar coordinates using Helmholtz potentials. The method of wave expansion is used to construct the displacement fields in terms of displacement potentials. The boundary conditions associated with the problem are satisfied exactly at the inner surface of the tunnel and at the interface between the tunnel and surrounding medium, and they are satisfied approximately at the free surface of the half space. A least-squares technique is used for satisfying the stress-free boundary conditions at the half space. It is shown by comparison that the stresses and displacements are significantly influenced by the properties of the surrounding soil, wave number (i.e., the frequency), depth of embedment, and thickness of the tunnel wall.

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Three‐Dimensional Dynamic Response of Twin Cavities due to Traveling Loads

Cited by 21 publications

References 4 publications

Study on Structural Service Performance of Heavy-Haul Railway Tunnel with Voided Base

Study on Structural Service Performance of Heavy-Haul Railway Tunnel with Voided Base

Experimental study on dynamic response of model shield tunnel induced by moving-axle loads of subway train

Dynamic Response of a Circular Tunnel in an Elastic Half Space

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