A shaking table-based experimental study of seismic response of shield-enlarge-dig type's underground subway station in liquefiable ground

An, Junhai; Tao, Lianjin; Jiang, Lu; Yan, Hongjin

doi:10.1016/j.soildyn.2021.106621

Cited by 21 publications

(8 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the model structure, gypsum and low elastic modulus pure aluminum wire are used to simulate the prototype concrete and steel rebar, respectively. Gypsum has been used for structural model making for a long time [24][25][26]. Its properties are relatively close to concrete, all of which are brittle materials, and the performance is stable, easy to form, and easy to process.…”

Section: Similitude Ratio Designmentioning

confidence: 99%

Seismic Response of a Two-Story Three-Span Subway Structural Model under High-Accelerated Geotechnical Centrifuge Shaking Table Test

Zhao

Wang

2022

Infrastructures

View full text Add to dashboard Cite

The seismic response of underground structures such as subway stations is critical. However, the complex underground structure experiments under a dynamic centrifuge shaking table are significantly limited. This study conducts a shaking table test of a two-story three-span underground structure under 50 g gravitational centrifuge acceleration to investigate soil–structure interaction effects (SSI). The test is performed on a sand soil-structural model using a laminar shear box with depths of 2.5 m, and the input motion is a Parkfield wave. The experimental results indicate that the central column of the two-story three-span underground structure is the weak component during the earthquake. In addition, the numerical simulations of the soil–structure system are carried out to study the effect of buried depth and foundation soil type on the seismic response of the underground structures. The experimental and numerical results proved that the performed centrifuge test can reproduce the key seismic response characteristics of the SSI in the prototype underground structure and provided guidelines to design a similar underground structure in the future development of the urban subway systems.

show abstract

Section: Similitude Ratio Designmentioning

confidence: 99%

Seismic Response of a Two-Story Three-Span Subway Structural Model under High-Accelerated Geotechnical Centrifuge Shaking Table Test

Zhao

Wang

2022

Infrastructures

View full text Add to dashboard Cite

show abstract

“…In recent years, scholars have carried out importance research focusing on the seismic responses and damage mechanisms of subway stations in liquefied layers, obtaining abundant research results. Wang, Jianning, Zhuang, and Haiyang et al [1][2][3] analyzed the seismic response law of a hetero-span subway station in a liquefied field through the use of shaking table tests and numerical simulations; Tang Bozan, and Chen Su et al [4,5] utilized a correlation analysis of the seismic responses of a subway station with irregular cross-sections in a liquefied site by means of shaking table tests; Chen Xiangsheng et al [6] proposed and designed a replacement method for non-liquefied clay based on the concept of a "resilient city", and, through numerical simulation analysis, proved that this method has a good effect on resisting the liquefaction of the soil and reducing the uplift of the station structure; Liu Chunxiao et al [7,8] conducted a detailed study on the seismic performance of monolayer two-span subway interval structures under different liquefaction location conditions through shaking table tests, and found that the liquefaction of soil at the bottom of the structure is the main cause of structural movement and inclined uplift; Zhang ZiHong and Xu ChengShun et al [9,10] investigated the effect of liquefied interbedded soil on the seismic response of underground structures via centrifuge tests; Duan Yagang [11] conducted a shaker test to investigate the seismic response of subway stations in liquefied soil layers; Xu Minze et al [12] analyzed the seismic response of burial depth on subway stations in liquefied sites; An Junhai et al [13][14][15][16][17] studied the seismic performance of shield-expanded subway stations and frame subway stations in liquefied sites by means of shaking table tests and numerical simulations, investigating the damage mechanism of shield-expanded subway stations and the deformation mechanism of frame subway stations; Shun Liu et al [18] conducted a numerical simulation to analyze the seismic response of a subway station embedded in saturated sand soil, revealing that the primary cause for the uplift of the station structure is the flow of liquefied sand soil beneath the station's base slab.…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Deep Soil Liquefaction on the Seismic Response of Subway Stations

Shi,

Tao,

Wang

2024

Applied Sciences

Self Cite

View full text Add to dashboard Cite

Subway systems are a crucial component of urban public transportation, especially in terms of safety during seismic events. Soil liquefaction triggered by earthquakes is one of the key factors that can lead to underground structural damage. This study investigates the impact of deep soil liquefaction on the response of subway station structures during seismic activity, aiming to provide evidence and suggestions for earthquake-resistant measures in underground constructions. The advanced finite element software PLAXIS was utilized for dynamic numerical simulations. Non-linear dynamic analysis methods were employed to construct models of subway stations and the surrounding soil layers, including soil–structure interactions. The UBC3D-PLM liquefaction constitutive model was applied to describe the liquefaction behavior of soil layers, while the HS constitutive model was used to depict the dynamic characteristics of non-liquefied soil layers. The study examined the influence of deep soil liquefaction on the dynamic response of subway station structures under different seismic waves. The findings indicate that deep soil liquefaction significantly increases the vertical displacement and acceleration responses of subway stations compared to non-liquefied conditions. The liquefaction behavior of deep soil layers leads to increased horizontal effective stress on both sides of the structure, thereby increasing the horizontal deformation of the structure and posing a potential threat to the safety and functionality of subway stations. This research employed detailed numerical simulation methods, incorporating the non-linear characteristics of deep soil layer liquefaction, providing an analytical framework based on regulatory standards for evaluating the impact of deep soil liquefaction on the seismic responses of subway stations. Compared to traditional studies, this paper significantly enhances simulation precision and practical applicability. Results from this research indicate that deep soil layer liquefaction poses a non-negligible risk to the structural safety of subway stations during earthquakes. Therefore, the issue of deep soil liquefaction should receive increased attention in engineering design and construction, with effective prevention and mitigation measures being implemented.

show abstract

“…When subjected to dynamic loads such as earthquakes, the strata are highly susceptible to collapse with large deformation, which leads to a large number of engineering problems such as structural uplift, uneven settlement, and damage to underground structures (Liu et al, 2021, Shen et al, 2022, Zheng et al, 2021). Previous research has primarily focused on the study of sandy soil layers (Huang et al, 2019, Hu et al, 2018, Kheradi et al, 2018, Liu et al, 2021, Tao et al, 2020), and the results showed that the liquefaction degree of far-field soil is greater than that of near-field soil (An et al, 2021), indicating that the presence of underground structures inhibits sand liquefaction. Su et al, (2021) investigated the stratum propagation law of the excess pore water pressure and acceleration.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the seismic performance of a large underground station structure in complex stratum considering the influence of axial force

Bao,

Liu,

Shen

et al. 2023

Advances in Structural Engineering

View full text Add to dashboard Cite

The large underground structure in saturated stratum is vulnerable to float during an earthquake. This results in a plethora of problems, such as uneven settlement, large internal force and structure damage. In this study, the seismic behavior of a three-story, two-span subway station in complex saturated stratum was investigated through water-soil fully coupled 3D finite element method. In the analysis, the nonlinear soil behavior was described by a cyclic mobility model and the structure was calculated using a nonlinear constitutive model which can consider the influence of axial force on its bending moment. Joints elements were used to model the contact surface between soil and structure. The development of the soil displacement and internal force of the station structure at different times during a huge earthquake was examined. The bearing capacity of the station structure members was analyzed. The results indicated that the vertical displacement was spatially distributed. The larger additional seismic stresses appeared in the bottom slab and side wall. Failed elements were observed in both the walls and slabs, and the walls were more easily damaged than the slab. The results provide useful reference for the large underground structure seismic design in the construction of urban underground space.

show abstract

A shaking table-based experimental study of seismic response of shield-enlarge-dig type's underground subway station in liquefiable ground

Cited by 21 publications

References 15 publications

Seismic Response of a Two-Story Three-Span Subway Structural Model under High-Accelerated Geotechnical Centrifuge Shaking Table Test

Seismic Response of a Two-Story Three-Span Subway Structural Model under High-Accelerated Geotechnical Centrifuge Shaking Table Test

Study on the Influence of Deep Soil Liquefaction on the Seismic Response of Subway Stations

Analysis of the seismic performance of a large underground station structure in complex stratum considering the influence of axial force

Contact Info

Product

Resources

About