A Numerical Study of the Screening Effectiveness of Open Trenches for High-Speed Train-Induced Vibration

Chiang, Chih‐Hung; Tsai, Pei-Hsun

doi:10.1155/2014/489090

Cited by 8 publications

(9 citation statements)

References 19 publications

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“…As can be seen from Fig. 4, our results are very close to those obtained by Israil and Banerjee [30] and also by Chiang and Tsai [31]. This validates the accuracy of our method.…”

Section: Verification Of the Methodssupporting

confidence: 88%

“…To verify the accuracy of the presented method, our results are firstly compared with those of article [30,31] which examined the screening effectiveness of open trenches on reducing vibration generated by a high-speed train using the 2D boundary element method. To compare, we set the shear velocity of the in-filled trench as 1 m/s and = 0 (by setting = 0, the presented 2.…”

Section: Verification Of the Methodsmentioning

confidence: 99%

“…In a recent study, Kim [15] studied the characteristics and the reduction methods of ground vibration due to the tilting train. Chiang and Tsai [16] examined the screening effectiveness of open trenches on reducing vibration generated by a high-speed train using 2D boundary element method in time domain. Esmaeili et al [17] firstly used a V-shaped trench to investigate the effect of the trench's shape on its performance.…”

Section: Introductionmentioning

confidence: 99%

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Reduction of train-induced vibrations by using a trench in a layered half-space

Ba¹,

Wang²,

Liang³

2016

J. vibroeng.

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A coupled model of a track-layered ground-in-filled trench system is developed to investigate the isolation effects of an in-filled trench on reducing vibrations generated by moving train loads. By using the substructure method, the whole model is decomposed into two parts: the layered ground containing the in-filled trench and the track. Firstly, the flexibility coefficient for moving uniformly distributed loads applied on the layered ground containing the trench is obtained by using the 2.5D indirect boundary element method. Then, the dynamic equilibrium equation of the track under the moving train loads and uniformly distributed loads are established. Finally, the layered ground and the track are coupled according to the equivalence between the deformation of the track and the vertical displacement of the layered ground. The validity of the method is confirmed by comparing its results with the published ones. Numerical calculations are performed by embedding an in-filled trench in a homogenous ground, in a single layered ground and also in the real site at Ledsgard as examples. The results show that the isolation effects are different for different ground conditions and for different geometric parameters such as the depth, width and location of the in-filled trench.

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“…As can be seen from Fig. 4, our results are very close to those obtained by Israil and Banerjee [30] and also by Chiang and Tsai [31]. This validates the accuracy of our method.…”

Section: Verification Of the Methodssupporting

confidence: 88%

Section: Verification Of the Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reduction of train-induced vibrations by using a trench in a layered half-space

Ba¹,

Wang²,

Liang³

2016

J. vibroeng.

View full text Add to dashboard Cite

show abstract

“…Hence, a number of train-track-subgrade interaction models have also been established during the last decade. Ma et al [18], Giner-Navarro et al [19], and Cai et al [20] constructed full traintrack-subgrade interaction models to study the wheel-track interaction behavior; and Kouroussis et al [21], Chiang and Tsai [22], Kouroussis and Verlinden [23], Alves Costa et al [24] and Zhai et al [25] investigated train-induced ground vibrations using train-track-subgrade interaction simulations. Galvin et al (2013) [26] applied a two-series suspension structure to simulate a train and constructed a 3D train-track-subgrade model to study the contact force between the train wheels and the rail of a high-speed railway, and their model obtained an acceptable subgrade dynamic stress compared with the field measurements.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Stress of Subgrade Bed Layers Subjected to Train Vehicles with Large Axle Loads

Liu

et al. 2018

Shock and Vibration

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The dynamic responses of subgrade bed layers are the key factors affecting the service performance of a heavy-haul railway. A 3D train-track-subgrade interaction finite element (FE) model was constructed using the ABAQUS code, where different vertical irregular track spectra were simulated by modifying the vertical node coordinates of the FE mesh of the rail. Then, the dynamic stresses in the subgrade bed layers subjected to heavy-haul trains were studied in detail. The results showed the following: (1) the transverse distribution of the dynamic stress transformed from a bimodal pattern to a unimodal pattern with increasing depth; (2) the pass of adjacent bogies of adjacent carriages can be simplified once loaded on the subgrade since the dynamic stresses are maintained around the peak value during the pass of the adjacent bogies; (3) the dynamic stress at the bottom of the subgrade bed surface layer was more sensitive to the train axle load compared with that at the subgrade surface because the dynamic stresses induced by the two rails were gradually overlaid with increasing depth; (4) the maximum dynamic stress at the subgrade bed bottom was reduced by approximately 70% compared with that at the subgrade surface; (5) the vertical track irregularities intensified the vertical excitation between the train vehicle wheels and rails, and the maximum dynamic stress at the subgrade surface under the action of the irregular heavy-haul track spectrum increased by 23% compared with the smooth rail condition; and (6) the possible maximum dynamic stress (σdm) at the subgrade surface under the action of irregular track spectra can be predicted using the triple standard deviation principle of a normally distributed random variable, i.e., σdm = μ + 3σ (where μ and σ are the expectation and standard deviation of σdm, respectively).

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“…Titreşim problemlerinin yaşandığı yumuşak zeminlerde, düşey [25][26][27][28][29][30] ve yatay konumlandırılmış dalga bariyer uygulamalarının [31][32][33][34][35][36][37] yalıtım performanslarıyla ilgili literatürde önemli sayıda teorik çalışma mevcuttur.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Doğalgaz Boru Hatlarında Dalga Bariyeri olarak Yapay Ana Kayanın Dalga Yayılışına Etkisi

2016

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ÖZDepremler yeryüzünün büyük bir kesimini etkileyerek mühendislik yapılarına ciddi hasarlar vermekte ve önemli ekonomik kayıplara yol açmaktadır. Bu yüzden, deprem etkisi altındaki boru hatlarının dayanımı ve güvenliği hayati öneme sahiptir. Zemin titreşimlerinin yayılma alanında ve korunacak yapı çevresinde azaltmak için yatay konumlandırılmış dalga bariyer uygulamaları inşaat mühendisliği çözümleri arasında yer almaktadır. Bu çalışmada yapı-zemin etkileşimi de dikkate alınarak 1999 Kocaeli depreminden kaynaklanan titreşim etkilerinin azaltılması için zeminin radyasyon sönümünü ifade eden enerji yutucu sınırları ve doğrusal olmayan malzeme özelliklerini de içeren bir nümerik model geliştirilmiştir. Geliştirilen bu model yardımıyla dalga bariyer sisteminde farklı kontrol parametrelerinin yalıtım etkisi kapsamlı parametrik çalışmalar yapılarak elde edilmiştir. Elde edilen sonuçlar dalga engelleyici yapay kaya dolgusunun titreşim etkilerinin azaltılmasında %70 mertebesinde etkili olduğunu ve bu tür problemler çözüm olarak gelecekte uygulanabileceğini göstermektedir.Anahtar Kelimeler: Dinamik analiz, doğalgaz boru hattı, dalga yayılımı, elasto-plastik davranış modeli Effect of artificial rock as a wave impeding barrier for wave propagation in pipeline ABSTRACTEarthquakes have destructive influences onto lifeline engineering and especially leading to considerable economic loss to the underground structure. Underground structures are significant unit of lifeline engineering. . Applying horizontal wave barriers is used in civil engineering as an alternative solution to reduce the soil vibrations in the wave propagation region and surrounding of the structures to be protected. In this study, discrete computer model including non-linear soil conditions as well as radiation damping is improved for testing corresponding wave propagation of earthquake vibrations in the soil under 1999 Kocaeli earthquake strong ground motion and mitigation of buried pipeline responses. Extensive parametric investigations by using the developed numerical model for isolation systems have been executed to conceive the influence of different controlling parameters on the screening efficiency. Results indicated that WIB are very promising as a cut off frequency isolators by reduction of * 70% and a promising candidate for future application in the field.

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A Numerical Study of the Screening Effectiveness of Open Trenches for High-Speed Train-Induced Vibration

Cited by 8 publications

References 19 publications

Reduction of train-induced vibrations by using a trench in a layered half-space

Reduction of train-induced vibrations by using a trench in a layered half-space

Dynamic Stress of Subgrade Bed Layers Subjected to Train Vehicles with Large Axle Loads

Doğalgaz Boru Hatlarında Dalga Bariyeri olarak Yapay Ana Kayanın Dalga Yayılışına Etkisi

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