Numerical analysis on the seismic performance of subway station in ground crack area

Chen, Xuan; Xiong, Zhongming; Zhuge, Yan; Liu, Yue

doi:10.1016/j.tust.2023.105012

Cited by 10 publications

(3 citation statements)

References 32 publications

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“…Ling et al [15] established the numerical model, and the train-induced building vibration was analyzed. Chen et al [16] analyzed the seismic performance and damage mechanism of metro station using the finite element model. (3) Theoretical analysis: Kouroussis et al [17] predicted train-induced ground vibrations using transfer functions.…”

Section: Introductionmentioning

confidence: 99%

Field Test and Numerical Study of Train-Induced Vibration of Over-Track Buildings Above Metro Depot

Chen,

Wan,

2024

Urban Rail Transit

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To maximize the use of urban land, many cities have built buildings above metro depots. However, the low-frequency vibration caused by metro operation affects the lives of surrounding residents, which seriously restricts the further development of over-track buildings. To study this problem, Firstly, the vibration of the metro depot and surrounding sensitive areas are tested on a large actual metro depot in Southwest China, and the rail, sleeper/support column, bearing column, and cover plate are mainly tested. Then, considering nonlinear factors such as mechanical properties of building materials, soil layering characteristics, and artificial viscoelastic boundary, the numerical coupled model of the train-track-depot-building is established, and the simulation data are compared with the test data to verify the accuracy of the numerical model. Finally, the impact of metro operation on the over-track buildings is evaluated. Results show that for the over-track buildings concerned in this paper, the floor vibration near the rail is the strongest, the main vibration frequency of the office building is concentrated in 10–20 Hz, and the maximum Z vibration level (VLzmax) of the office building is 52.02 dB. The main vibration frequency of the residential building is similar to that of the office building, and the superposition of floor vibration energy causes the vibration of the mid-span point to be larger than the vibration of the corner point and the side wall point. The vibration wave of lower floors mainly propagates through the bearing column, and the vibration of the parking garage is larger than other buildings. The research results can provide a reference for the vibration control and design of over-track buildings above the metro depot.

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Section: Introductionmentioning

confidence: 99%

Field Test and Numerical Study of Train-Induced Vibration of Over-Track Buildings Above Metro Depot

Chen,

Wan,

2024

Urban Rail Transit

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“…The intrinsic relationship between the two DMs was revealed and the correlation coefficients were proposed through correlation analysis. Chen et al [21] analyzed the seismic performance levels of subway stations in the ground crack zone. Through numerical analysis and comparison of experimental results, it was concluded that ground cracks have a significant effect on the seismic response of subway stations.…”

Section: Introductionmentioning

confidence: 99%

Seismic Response and Damage Analysis of Large Underground Frame Structures without Overburden

Ding,

Zhao,

Shen

2024

Applied Sciences

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With the development of the Chinese economy and society, the height and density of urban buildings are increasing, and large underground transportation hubs have been constructed in many places to alleviate the pressure of transportation. Commercial buildings are usually developed above the large underground transportation hubs, so the underground structures may have very shallow depths or no soil cover. The seismic response and damage mechanisms of such underground structures still need to be studied. In this paper, an example of a project in China is taken as an object to analyze the seismic response and damage mechanism of the structure after simplification. The spatial distribution of deformations and internal forces of such structures and the location of the maximum internal forces are obtained, and the effect of the frequency of seismic motions on the structural response is obtained. Finally, an elastoplastic analysis of such structures is carried out to assess the damage location and the damage evolution process.

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“…To guarantee smooth traffic flows and the demand for crowd gathering, subway stations possess large spaces, which could be defined as large underground structures. It is unavoidable to build large underground structures in seismic areas with adverse geological conditions [5][6][7][8]. The complexity of the soil-structure interactions (SSIs) at adverse geological sites makes the seismic responses of underground structures very distinct from their regular responses [9].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

Self Cite

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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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Numerical analysis on the seismic performance of subway station in ground crack area

Cited by 10 publications

References 32 publications

Field Test and Numerical Study of Train-Induced Vibration of Over-Track Buildings Above Metro Depot

Field Test and Numerical Study of Train-Induced Vibration of Over-Track Buildings Above Metro Depot

Seismic Response and Damage Analysis of Large Underground Frame Structures without Overburden

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

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