Shaking-table tests and numerical simulations on a subway structure in soft soil

Chen, Guoxing; Chen, Su; Zuo, Xi; Du, Xiuli; Qi, Chengzhi; Wang, Zhihua

doi:10.1016/j.soildyn.2014.12.012

Cited by 125 publications

(18 citation statements)

References 21 publications

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“…In previous dynamic centrifuge tests, the models structures were made of metal, [34][35][36][37][38][39][40] particulate concrete, [17][18][19][20][21][22][23]41 or lowstrength particulate concrete. 23,42 Referring to above references, it was found that the metal materials and normal particle concrete were difficult to damage in the model test, so they were not suitable to study the damage issues of structure.…”

Section: Preparation Of Model Structurementioning

confidence: 99%

“…In the past 20 years, many physical model tests have been carried out to study the seismic response of underground structures. 7,[17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] However, most research focused on the issues of input earthquake characteristics or liquefaction site on seismic behavior of underground structures. 17,18,[25][26][27][28][29] Few of studies have been conducted in investigating the seismic failure mechanism of underground structure.…”

Section: Introductionmentioning

confidence: 99%

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Seismic response and failure mechanism of underground frame structures based on dynamic centrifuge tests

Zhang

et al. 2021

Earthq Engng Struct Dyn

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During the 1995 Kobe earthquake in Japan, the Daikai subway station suffered total collapse, which made the research on the seismic failure mechanism of underground frame structures become a hot topic. The author has carried out a lot of research on earthquake failure mechanism of underground frame structures based on numerical method. To validate and further study the seismic failure response and mechanism of underground frame structures, a series of comparative dynamic centrifuge tests were carried out. The research conclusions are as follows. The vertical earthquake action significantly increased the axial pressure on the columns of an underground frame structure, reducing their horizontal deformation capacity. The columns subjected to high axial compression were prone to brittle damage under a relatively strong horizontal earthquake, which led to the overall collapse of an underground frame structure. The areas near the intersection of the ceiling slab and the sidewalls were the weak part of the underground frame structure and were vulnerable to tensile cracks under earthquake. The columns' top and bottom were the fragile parts and were prone to concrete cracking or even shear failure under an earthquake. If the columns could remain intact and effectively provided vertical support under a strong earthquake, it was beneficial to reduce the risk of the overall collapse of an underground frame structure. K E Y W O R D Sdifferent deformation capacity of top slab and columns, dynamic centrifuge test, seismic failure response and mechanism, underground frame structure, vertical earthquake action

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Section: Preparation Of Model Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seismic response and failure mechanism of underground frame structures based on dynamic centrifuge tests

Zhang

et al. 2021

Earthq Engng Struct Dyn

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“…e seismic response of rectangular tunnels has been a subject of in-depth research. A wide range of studies using centrifuge tests [2][3][4][5][6][7][8][9][10][11], shaking table tests [12][13][14][15][16][17][18][19], and numerical simulations [7,[20][21][22][23][24][25][26][27][28][29][30] have been performed. Previous studies revealed that there is a unique relationship between flexibility ratio (F) and the racking ratio (R), where F is the relative stiffness between the tunnel and the surrounding soil and R is defined as the ratio of the displacement of the tunnel and free-field soil.…”

Section: Introductionmentioning

confidence: 99%

Effect of Flexibility Ratio on Seismic Response of Cut‐and‐Cover Box Tunnel

Sadiq

Nguyen

Jung

et al. 2019

Advances in Civil Engineering

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Equivalent linear time history analyses are conducted to calculate the seismic response of various types of cut-and-cover single box tunnels. A finite-element numerical model is calibrated against the results of centrifuge tests. The calculated tunnel responses compare favourably with the measurements. A validated model is then used to quantify the seismic response of box tunnels. The flexibility ratio (F) is illustrated to have a governing influence on the tunnel response. It is shown that the previously developed relationship between F and the racking ratio (R) is applicable for a wide range of F up to 20. It is also shown that an increase in F accompanies corresponding increase in R, the spectral acceleration in the tunnel lining, and the shear stress along the tunnel lining-soil interface. The thrust in the tunnel lining is also revealed to increase with F, although the calculated value is significantly lower than the pressure on yielding walls. Additionally, the surface settlement is shown to increase with an increase in F.

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“…Pitilakis et al [12] carried out a series of tests in order to validate numerical simulations of soil-structure interaction effects using a centrifuge model structure and non-liquefiable soil. Guoxing et al [13] performed shaking table tests to investigate the damage mechanisms of a subway structure in soft soil under strong ground motions. Their results provided insight into how the characteristics of strong ground motion might influence the structure.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of the behavior of shallow rectangular tunnels

Hassanzadeh¹,

Hajialilue-Bonab²

2018

J. vibroeng.

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The behavior of an underground structure under dynamic loading is affected by many factors such as shape, depth and stiffness of the structure as well as the frequency content of the input motion. Scarcity of experimental/field investigations precludes proper understanding of these parameters' effects on the seismic behavior of aforementioned structures. In this study, the effects of input motion along with structural stiffness properties on seismic behavior of rectangular tunnels are investigated. Three reduced-scale 1 g shaking table models were constructed in 1/48 scale. Tests were carried out in the shaking table facility at the University of Tabriz on model tunnels of the rectangular section of the shallow Tabriz subway tunnel, using input motions of different amplitudes and frequencies. In addition, a numerical study was done using the coupled scaled boundary finite element-finite element (SBFE-FE) method. A good agreement between the numerical model and the results of the experimental test was achieved. Using the shaking table test, the accelerations and bending moments of the tunnel lining were measured. The results show that tunnel lining stiffness affects the acceleration response of the ground. A parametric study by the numerical approach was presented and effects of the variation of elastic modulus and mass density of the soil were evaluated.

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Shaking-table tests and numerical simulations on a subway structure in soft soil

Cited by 125 publications

References 21 publications

Seismic response and failure mechanism of underground frame structures based on dynamic centrifuge tests

Seismic response and failure mechanism of underground frame structures based on dynamic centrifuge tests

Effect of Flexibility Ratio on Seismic Response of Cut‐and‐Cover Box Tunnel

Experimental and numerical study of the behavior of shallow rectangular tunnels

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