Study on seismic performance and index limits quantification for prefabricated subway station structures

Chen, Jinnan; Xu, Chengshun; Naggar, Hesham El; Du, Xiuli

doi:10.1016/j.soildyn.2022.107460

Cited by 21 publications

(11 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An ideal elastic‐plastic constitutive model is used for steel bars and sleeves. Details of modelling have been introduced in literature 33,35 …”

Section: Numerical Validation Of Testing Methodologymentioning

confidence: 99%

“…Details of modelling have been introduced in literature. 33,35 The Kobe ground motion record was used as the input motion, the ground motion acceleration time-history curve and Fourier spectra are shown in Figure 23. After baseline correction and filtering, adjusting the horizontal peak ground acceleration (PGA) to 0.2, 0.4, and 0.6 × g, and vertical PGA was taken as 2/3 of the horizontal PGA.…”

Section: Finite Element Model Of Prototype Stationmentioning

confidence: 99%

“…The elastic limit point, yield point, peak point, and ultimate point are important features of the skeleton curve. The yield displacement of the three skeleton curves are obtained by graphical method 33,35 and the corresponding yield load is obtained, while the ultimate load corresponds to the point at which load drops to 85% of the peak load. The IDRs corresponding to each feature point and the load value are listed in Table 5.…”

Section: Load-displacement Curvementioning

confidence: 99%

See 2 more Smart Citations

Design and commissioning of novel test apparatus for underground structures and its application in seismic damage testing of prefabricated subway station

Chen,

Xu,

et al. 2024

Earthq Engng Struct Dyn

Self Cite

View full text Add to dashboard Cite

This paper presents the design and commissioning of a novel pseudo‐static test apparatus for underground structures that accounts for soil‐structure interaction by simulating the soil with suitably designed springs. The developed apparatus was employed to conduct 1:10 large scale tests on a two‐story three‐span prefabricated subway station structure. Two comparative cyclic load tests were conducted: one involved the developed springs‐structure system; and one involved the structure alone (no springs). The test results demonstrated important differences in the damage location, damage degree, bearing capacity, and deformation capacity of the prefabricated subway station structure under the two loading conditions (i.e., with and without springs). The presence of springs (i.e., soil‐structure interaction) enhanced the lateral collapse resistance of the underground structure and affected the inter‐story displacement ratio (IDR) between the upper and lower layers of the two‐story prefabricated subway station structure. However, it did not affect the deformation coordination of the walls and columns of each layer. A finite element model of the prototype station was also established to conduct dynamic time history analysis simulating the soil‐structure interaction. The results from the dynamic analysis validated the effectiveness of the pseudo‐static test method employing the spring‐structure system. The excellent agreement between the calculated dynamic responses and the responses obtained from the pseudo static tests confirmed the ability of the developed apparatus to conduct seismic tests on complex large‐scale underground structures such as prefabricated subway stations. Thus, this test methodology might be utilized to attain valuable insights into the seismic performance of prefabricated subway stations at a relatively low cost and effort.

show abstract

“…An ideal elastic‐plastic constitutive model is used for steel bars and sleeves. Details of modelling have been introduced in literature 33,35 …”

Section: Numerical Validation Of Testing Methodologymentioning

confidence: 99%

Section: Finite Element Model Of Prototype Stationmentioning

confidence: 99%

Section: Load-displacement Curvementioning

confidence: 99%

See 1 more Smart Citation

Design and commissioning of novel test apparatus for underground structures and its application in seismic damage testing of prefabricated subway station

Chen,

Xu,

et al. 2024

Earthq Engng Struct Dyn

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Literature Reviewmentioning

confidence: 99%

“…The results showed that the seismic response of the sidewall joints was obvious with the most severe damage, making them weak joints of the fabricated station structure. Chen et al (2022) evaluated the seismic performance of rectangular prefabricated and cast-in-place underground structures considering soil-structure interaction. Index limits are quantified for four seismic performance levels, which can be considered in the performance-based design of prefabricated underground structures.…”

Section: Research On Prefabricated Subway Stationsmentioning

confidence: 99%

Research on the construction safety risk assessment of prefabricated subway stations in China

Luo

Guo

Han

et al. 2022

ECAM

View full text Add to dashboard Cite

PurposePrefabricated technology is gradually being applied to the construction of subway stations due to its characteristic of mechanization. However, the prefabricated subway station in China is in the initial stage of development, which is prone to construction safety issues. This study aims to evaluate the construction safety risks of prefabricated subway stations in China and formulate corresponding countermeasures to ensure construction safety.Design/methodology/approachA construction safety risk evaluation index system for the prefabricated subway station was established through literature research and the Delphi method. Furthermore, based on the structure entropy weight method, matter-element theory and evidence theory, a hybrid evaluation model is developed to evaluate the construction safety risks of prefabricated subway stations. The basic probability assignment (BPA) function is obtained using the matter-element theory, the index weight is calculated using the structure entropy weight method to modify the BPA function and the risk evaluation level is determined using the evidence theory. Finally, the reliability and applicability of the evaluation model are verified with a case study of a prefabricated subway station project in China.FindingsThe results indicate that the level of construction safety risks in the prefabricated subway station project is relatively low. Man risk, machine risk and method risk are the key factors affecting the overall risk of the project. The evaluation results of the first-level indexes are discussed, and targeted countermeasures are proposed. Therefore, management personnel can deeply understand the construction safety risks of prefabricated subway stations.Originality/valueThis research fills the research gap in the field of construction safety risk assessment of prefabricated subway stations. The methods for construction safety risk assessment are summarized to establish a reliable hybrid evaluation model, laying the foundation for future research. Moreover, the construction safety risk evaluation index system for prefabricated subway stations is proposed, which can be adopted to guide construction safety management.

show abstract

Effects of axial compression ratio on seismic behavior of shallow‐buried rectangular stations: Hybrid simulation and quasi‐static test

Cai,

Yang,

Liu

et al. 2024

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

In the absence of experimental investigations on column members of underground structures, full‐scale column specimens were tested to explore the seismic behavior of shallow‐buried subway stations at various depths. The axial compression ratios of internal column specimens were set as 0.16, 0.33, and 0.40. Both hybrid simulations and quasi‐static tests were performed on the station columns. The hybrid simulations illustrated the drift demands of internal columns, while the load‐carrying capacity and deformation capacity were obtained from the quasi‐static tests. Hybrid simulations at low, moderate, and high‐intensity levels were conducted to study the seismic responses of shallow‐buried rectangular stations. The hybrid simulations suggest that the most severe damage occurred in the station when the axial compression ratio of the tested column reached 0.40. Central columns suffered severe stiffness deterioration under high‐level earthquake excitation, especially in stations at greater depths. Meanwhile, the quasi‐static test results indicate that the ultimate load of the central columns increases with increasing axial compression, but this leads to a significant decrease in the ductility of columns. Besides, the sectional analysis results show that the central columns are prone to tension‐controlled failure, and the safety margin for flexural response deteriorates with an increasing axial compression ratio. The test results indicate that shallow‐buried rectangular stations are susceptible to flexure‐controlled structural failure when their central columns possess a relatively low axial compression ratio and a high shear span‐to‐depth ratio. The failure mechanism of station columns is revealed by both the hybrid simulations and quasi‐static tests, and the findings from the full‐scale tests are beneficial for the practical design of shallow‐buried rectangular stations.

show abstract

Study on seismic performance and index limits quantification for prefabricated subway station structures

Cited by 21 publications

References 22 publications

Design and commissioning of novel test apparatus for underground structures and its application in seismic damage testing of prefabricated subway station

Design and commissioning of novel test apparatus for underground structures and its application in seismic damage testing of prefabricated subway station

Research on the construction safety risk assessment of prefabricated subway stations in China

Effects of axial compression ratio on seismic behavior of shallow‐buried rectangular stations: Hybrid simulation and quasi‐static test

Contact Info

Product

Resources

About