Effects of reinforcement ratio on seismic performance of hypothetical stations determined by full-scale central column tests

Cai, Xuesong; Yang, Chengyu; Yuan, Yong; Jiang, Liming

doi:10.1007/s10518-021-01314-7

Cited by 8 publications

(6 citation statements)

References 53 publications

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“…The moment atop the central column closely aligns with the negative value of the moment at the bottom in box‐type stations. Meanwhile, the soil arch did not form for shallow‐buried subway stations when the buried depth was less than 8 m, 42 and the vertical loads imposed on the central columns were mainly influenced by the gravity of overlying soil layers 35,36 . Figure 9 shows that the axial compression of tested columns in Models A, B, and C does not change significantly when the peak acceleration of horizontal motions reaches 0.6 g. The seismic responses of the proposed shallow‐buried stations indicate that: (1) the inflection point of the central column is near its middle point and (2) the vertical load of the central column is mostly determined by the buried depth of the overburdened soil.…”

Section: Hybrid Simulation Of Subway Stationsmentioning

confidence: 98%

“…21,60 Therefore, the lower portion of the internal column was selected as the physical substructure for the subsequent hybrid simulations, while the rest of the model was selected as the numerical substructure, as shown in Figure 10. 35…”

Section: Substructuring Technique Of Rectangular Subway Stationsmentioning

confidence: 99%

“…Besides, hybrid simulations and their results would be most benefited when examining the behaviour of strong deterioration in strength and stiffness. However, the tested columns remained safe and behaved elastically in the previous hybrid simulations of box-type stations, 35 which motivates us to perform hybrid simulations on station columns with strong nonlinearity to investigate the effects of axial compression ratio.…”

Section: Introductionmentioning

confidence: 97%

“…For box-type stations, a part of the station column was typically selected for testing, while the remaining structure and soil domain were numerically modeled. 35,36 The seismic interaction between the soil and structure is influenced by the relative stiffness of the soil compared to the structure, 37 which is determined by the modulus and strength of both the soil and structural materials. This influence becomes especially significant when the stations and their elements approach nonlinear states.…”

Section: Introductionmentioning

confidence: 99%

“…In this design, the bridge piers served as the experimental substructure, and hybrid testing reproduced the shear failure mode of the bridge piers, 32–34 considering soil‐structure interaction by modeling the soil domain. For box‐type stations, a part of the station column was typically selected for testing, while the remaining structure and soil domain were numerically modeled 35,36 . The seismic interaction between the soil and structure is influenced by the relative stiffness of the soil compared to the structure, 37 which is determined by the modulus and strength of both the soil and structural materials.…”

Section: Introductionmentioning

confidence: 99%

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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

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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.

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Section: Hybrid Simulation Of Subway Stationsmentioning

confidence: 98%

Section: Substructuring Technique Of Rectangular Subway Stationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Self Cite

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A distributed remote collaborative hybrid test method for complex substructures based on OpenFresco

Guo

et al. 2023

Bull Earthquake Eng

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A distributed remote collaborative hybrid test (RCHT) method for complex substructures based on OpenFresco is presented in this paper. Challenges in the RCHT include the modeling of the numerical substructure, boundary degreeof-freedom (DOF) loading, and equivalent communication of the multi-story space frame as a test substructure in OpenFresco. The effectiveness and accuracy of the proposed RCHT method are verified by a series of remote distributed tests that reproduce the seismic response of a three-story five-span space Y-shaped eccentric brace steel frame model consisting of two test substructures and a numerical substructure. The main contributions of this study are the realization of the multi DOF loading RCHT of the space global frame and reasonable simplification of the substructure boundaries, which further promotes the use of the RCHT method to realize the seismic performance simulation of complex substructures.

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Dynamic analytical model for shaft-tunnel junction under P-SV waves

Zhang

Yuan

Sun

2022

Applied Mathematical Modelling

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Effects of reinforcement ratio on seismic performance of hypothetical stations determined by full-scale central column tests

Cited by 8 publications

References 53 publications

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

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

A distributed remote collaborative hybrid test method for complex substructures based on OpenFresco

Dynamic analytical model for shaft-tunnel junction under P-SV waves

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