Shaking-table tests on seismic behavior of subway station intersecting the ground fissure

Chen, Xuan; Xiong, Zhongming; Zhuge, Yan; Chen, Zhi

doi:10.1016/j.soildyn.2022.107272

Cited by 13 publications

(4 citation statements)

References 29 publications

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“…It was noted that a foam board with a thickness of 2 mm was used to seal the model structure to prevent the inflow of soil and water during the test. This was the same as the fabrication method in reference [39]. To meet the requirements of the similarity relations in the test, micro-particle concrete and zinc-coated wires were used as the fabrication materials of the underground structure model.…”

Section: Variables Parameters Similitude Relationsmentioning

confidence: 99%

Section: Variables Parameters Similitude Relationsmentioning

confidence: 99%

“…It was noted that a foam board with a thickness of 2 mm was used to seal the model structure to prevent the inflow of soil and water during the test. This was the same as the fabrication method in reference [39]. Meanwhile, a mixture of loess collected from the prototype site and sawdust was selected as the material of the model soil, and the dynamic shearing modulus of the model soil was determined using the relative stiffness for a study on the soil-structure interaction [36].…”

Section: Variables Parameters Similitude Relationsmentioning

confidence: 99%

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Experimental Investigations of the Seismic Response of a Large Underground Structure at a Soft Loess Site

et al. 2023

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Based on an underground structure located at a soft loess site in Xi’an as the engineering background, this paper investigated a seismic response and damage model of subway stations at a soft loess site using a large-scale shaking table test, considering the different characteristics of ground motions. The quantitative analysis of the acceleration response and the seismic subsidence of the soft loess site were subjected to different earthquake excitations; based on the experimental results and the corresponding analysis, the development and distribution of seismic structural damage were studied, and the damage mechanism of underground structures in a soft loess area under a strong earthquake was explored. The results indicate that the peak accelerations of the site soil first remained unchanged then increased significantly along the soil height, and the amplification effect of the acceleration response was the most significant at the soil surface. The soft loess soil underwent significant subsidence, and the underground structure was raised compared to both sides of the cover soil; the collapsibility of the soft loess soil was sensitive to strong earthquakes with vertical components. The underground structures in soft loess suffered heavy damage, which rapidly entered the elastic–plastic stage. The composite effect of the collapsibility and vertical seismic excitation impaired the load-carrying capacity of the middle columns, and the strong horizontal seismic excitation enlarged the lateral force and accelerated structural damage development; the underground structure reached failure when plastic damage expended most of the middle columns and structural joints. These results are significant for the seismic design of underground structures in adverse soil conditions.

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Section: Variables Parameters Similitude Relationsmentioning

confidence: 99%

Section: Variables Parameters Similitude Relationsmentioning

confidence: 99%

“…It was noted that a foam board with a thickness of 2 mm was used to seal the model structure to prevent the inflow of soil and water during the test. This was the same as the fabrication method in reference [39]. Meanwhile, a mixture of loess collected from the prototype site and sawdust was selected as the material of the model soil, and the dynamic shearing modulus of the model soil was determined using the relative stiffness for a study on the soil-structure interaction [36].…”

Section: Variables Parameters Similitude Relationsmentioning

confidence: 99%

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Experimental Investigations of the Seismic Response of a Large Underground Structure at a Soft Loess Site

et al. 2023

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“…At present, there are few studies on the station structure in clay layers under the action of earthquakes, which mainly focus on the analysis of the site response (Chen et al, 2013, 2021). According to the findings, the formation of excess pore water pressure in the clay stratum under the action of an earthquake load is slow, and the dispersion of excess pore water pressure around the structure has a clear spatial effect (Chen et al, 2015). Other studies have focused on the analysis of structural internal force (Chen and Liu, 2018, Lei and Yong, 2020, Miao et al, 2020, Wang et al, 2021, Xu et al, 2020).…”

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

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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.

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Calculation of unusual stratum load for metro tunnel crossing active ground fissure considering different intersection angles

Gou,

Huang,

Yang

et al. 2024

Alexandria Engineering Journal

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Shaking-table tests on seismic behavior of subway station intersecting the ground fissure

Cited by 13 publications

References 29 publications

Experimental Investigations of the Seismic Response of a Large Underground Structure at a Soft Loess Site

Experimental Investigations of the Seismic Response of a Large Underground Structure at a Soft Loess Site

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

Calculation of unusual stratum load for metro tunnel crossing active ground fissure considering different intersection angles

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