Comparative study of the seismic performance of prefabricated and cast-in-place subway station structures by shaking table test

Tao, Lianjin; Ding, Peng; Yang, Xiling; Lin, Peng; Shi, Cheng; Bao, Yan; Wei, Pengcheng; Zhao, Ji Wei

doi:10.1016/j.tust.2020.103583

Cited by 48 publications

(12 citation statements)

References 18 publications

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“…The frequent occurrence of earthquakes in recent years has also made people pay increasing attention to the seismic performance of prefabricated utility tunnels. However, there are currently few researches on the seismic response of prefabricated utility tunnels, and most of the related researches mainly focus on traffic tunnels, [12][13][14] subway stations [15][16][17] and underground garages. 18 Compared with prefabricated utility tunnels, these underground structures are quite different with respect to cross section, structural length and construction methods.…”

Section: Introductionmentioning

confidence: 99%

Experimental research on seismic response of split‐type prefabricated utility tunnels through shaking table tests

Luo

Zhou

2022

Earthq Engng Struct Dyn

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Due to the advantages of prefabricated structure, its applications in utility tunnels are increasing. However, more connection joints have raised concerns about the vulnerability of prefabricated utility tunnels in earthquake disasters. The main objectives of this research are to analyze the seismic response, vulnerable parts and failure modes of a prefabricated utility tunnel. A pair of twin models of prefabricated utility tunnels with two‐compartment layouts were designed, and then set up to load ground motions synchronously through a large‐scale shaking table of 6 m × 6 m under two different boundary conditions: one buried inside a soil box and its twin laid outside the soil as a comparison. The results show that: the damage of the split‐type prefabricated utility tunnel is mainly concentrated in the connection joints, and the connection joint at the top corner of the compartment with larger cross section is the vulnerable part that needs special attention; the SSI effect has a great influence on the seismic response of the prefabricated utility tunnel, and the model buried inside the soil box shows stronger seismic response than its twin laid outside the soil. The experimental results and analysis in this paper can provide a helpful reference for risk assessment and prevention, seismic design, and structural optimization of prefabricated utility tunnels.

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Section: Introductionmentioning

confidence: 99%

Experimental research on seismic response of split‐type prefabricated utility tunnels through shaking table tests

Luo

Zhou

2022

Earthq Engng Struct Dyn

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“…Different from ground surface structures, the applied load of tunnels is hard to be accurately estimated due to the complexity of the mechanical properties of soils [8], thus making the mechanical responses of tunnels ambiguous. Currently, subways are being constructed in all regions of China, from the north [9] to the south [10] and from the west [11] to the east [12]. e soil conditions vary from place to place, thus resulting in different mechanical responses.…”

Section: Introductionmentioning

confidence: 99%

Movements and Its In‐Process Control of Ground and Built Structures due to Tunnelling in Urban Areas

Zhang

Cao

Fei

et al. 2022

Advances in Civil Engineering

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Tunnelling-induced environmental responses including ground movements and deformation of the environmental structures are the two prominent issues needed to be carefully disposed in urban areas. This paper tries to develop a theoretical framework to evaluate and control the environmental deformation to avoid two disasters including ground collapse and structural failure. According to the mechanical responses of the ground due to tunnelling, the urban ground in China can be roughly divided into three types including composite multilayered ground, highly water-bearing ground, and mixed rock ground. The displacements of ground and environmental structures due to tunnelling in multilayered ground are emphatically discussed in view of its largest proportion distribution. The cumulative and mutational characteristics of the displacements are considered, which can be the main basis for distinguishing the occurrence of two types of disasters. Based on the development of the displacements, the three-stage evolution model of disaster is established. Combined with the existing displacement and degeneration of the ground and structures and the safety factor, the displacement control standards can be eventually determined. The theoretical framework of in-process control is established which is based on the prediction, measurement, and control standards of the displacements. In the framework, the prediction model can be modified in time, and the tunnelling parameters can be adjusted synchronously. The current research is successfully applied in the Qinghuayuan Tunnel Project.

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“…Li and Su [29,30] conducted axial bending test research on the connected joints of prefabricated components and found that the initial stiffness of the joints was large and the flexural stiffness increased with the increase of axial force. Taking Yuanjiadian station structure as the research object, Tao and Ding [31][32][33] comparatively studied the differences in internal force and deformation between the fabricated and cast-in-place structures through experimental and numerical analyses. The fabricated station structure has better energy dissipation capacity than the cast-in-place station structure, but the lateral deformation resistance is weak.…”

Section: Introductionmentioning

confidence: 99%

“…The fabricated station structure has better energy dissipation capacity than the cast-in-place station structure, but the lateral deformation resistance is weak. Although some scholars have conducted seismic research on fabricated station structures, the existing literature [29][30][31][32][33] does not give any research results about the weak locations and joints of fabricated station structures.…”

Section: Introductionmentioning

confidence: 99%

Effect Mechanism of Connection Joints in Fabricated Station Structures

He¹,

Li²

2021

Applied Sciences

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The seismic response of a fabricated subway station is a complex structural connection problem that depends on the mechanical properties of the joints. In order to obtain the optimal joint distribution of a fabricated station structure under earthquake action, three finite element models of a single ring structure of fabricated subway stations assembled with seven, five, and four prefabricated components were proposed. Seismic wave characteristics, peak acceleration, and coupled horizontal and vertical seismic components were considered to study the seismic response of the fabricated subway station structure with different forms of the joint distribution. The dynamic time history method was used to analyze the seismic response in three aspects: structure plastic strain, interlayer relative deformation, and internal force. The damage indexes and residual strength indexes of the joints were offered based on the concrete damage index to evaluate the joints’ damage degree. The results showed that the joints of the vault or bottom plate had little influence on the seismic response of the fabricated station structure. The sidewall joints had the obvious seismic response and the most severe damage under horizontal ground motion or coupled ground motion, which were the weak joints of the fabricated station structure. The existence of vertical ground motion aggravated the damage degree of sidewall joints, making the damage occurrence time of sidewall joints earlier and the damage end time extended. On the premise of meeting the mechanical load and site requirements, an assembly scheme with fewer prefabricated components can be selected.

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Comparative study of the seismic performance of prefabricated and cast-in-place subway station structures by shaking table test

Cited by 48 publications

References 18 publications

Experimental research on seismic response of split‐type prefabricated utility tunnels through shaking table tests

Experimental research on seismic response of split‐type prefabricated utility tunnels through shaking table tests

Movements and Its In‐Process Control of Ground and Built Structures due to Tunnelling in Urban Areas

Effect Mechanism of Connection Joints in Fabricated Station Structures

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