Seismic ground motion amplification pattern induced by a subway tunnel: Shaking table testing and numerical simulation

Moghadam, Masoud Rabeti; Baziar, Mohammad Hassan

doi:10.1016/j.soildyn.2016.01.002

Cited by 99 publications

(15 citation statements)

References 16 publications

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“…In the last few years, seismic response characteristics of underground structures have been deeply and extensively studied by shaking and centrifuge table tests to check current design and analysis methods (Such as: Cilingir and Madabhushi, 2011;Varghese and Madhavi Latha, 2014;Baziar et al, 2014;Dashti et al, 2016;Rabeti Moghadam and Baziar, 2016;Farahi et al, 2018;Ritesh et al, 2019). Tamari and Towhata (2003) launched a series of shaking table tests on a flexible rectangular cross-section structure in liquefiable ground.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on seismic response of subway station built in loess

Quan

Chai

Chen

et al. 2020

Lat. Am. j. solids struct.

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The present investigation is concerned with the dynamic seismic response of subway station built in loess site by a series of shaking table tests. Firstly, according to the Bockingham π theorem, the scale ratio is determined and then the model system is designed. Then, based on the geological environment and seismological background of Xi'an, the input ground motions and loading scheme are determined. On the basis of the test data, the acceleration responses of model system, strain response characteristics of the structure, distribution of dynamic soil pressure between loess and structure, the settlement of model ground and the seismic damage mode of model system are analyzed systematically. The results show that the peak accelerations in model soil increase gradually from the bottom to the top of the soil. The peak tensile strains measured at the top and bottom of the center columns are larger than those obtained at the side walls, while the peak tensile strains in the floor slab are the smallest. Moreover, the relationship between structure uplift and soil pressure difference can be fitted by exponential function.

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Section: Introductionmentioning

confidence: 99%

Experimental study on seismic response of subway station built in loess

Quan

Chai

Chen

et al. 2020

Lat. Am. j. solids struct.

View full text Add to dashboard Cite

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“…The impact of underground structures on the seismic response of the surrounding soil depends on its dimension and, in turn, also affects the seismic response of adjacent buildings Moghadam and Baziar (2016)…”

Section: Wang Et Al (2017)mentioning

confidence: 99%

Seismic performance of soil–tunnel–building systems in stiff soils

2023

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In order to study seismic soil–tunnel–building interaction in stiff soils, a metro station currently under construction, located near by a 5-story masonry building, was selected as a test site for seismic instrumentation. The site is in Mexico City, in the so-called hill zone, where very cemented sandy silt and silty sands can be found. An arrangement of five accelerometers were deployed, to assess free-field, near-field, and building seismic response. This article presents the results gathered from the seismic instrumentation after recording five low- to high-magnitude earthquakes (i.e. ranging from 4.8 to 7.7 Mw) from both interface and intraplate events. The results clearly indicate that even in low- to medium-magnitude events, the presence of the tunnel leads to peak ground acceleration (PGA) amplification both in the horizontal and vertical components, ground motion incoherence, and spectral accelerations (Sa) amplification at high frequencies. Although Sa amplification is more important for intraplate and interface low- to medium-magnitude events, frequency content modification occurs regardless of the earthquake magnitude. These facts must be accounted for when designing low- to medium-rise structures underlaid or nearby underground infrastructure such as tunnels in highly populated urban areas.

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“…The effects of the single underground structure on the ground acceleration were revealed in a number of experimental and numerical studies [37,38]. The amplification pattern of the soil near the underground structure depends on several factors, such as the width, depth and relative stiffness of the underground structure.…”

Section: Spatial Effects Of the Interchange Station On The Ground Resmentioning

confidence: 99%

Shaking Table Test on the Response of a Cross Interchange Metro Station under Harmonic Excitations Refers to a Single Two-Storey Metro Station

Ding

et al. 2021

Applied Sciences

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Interchange is essential in a metro network. Regarding the seismic performance, a series of large-scale shaking table tests were performed on an interchange station. The interchange station was composed of a two-story section rigidly connected to a perpendicular three-story section, leading to an abrupt change of stiffness in the conjunction area. Synthetic model soil (a mixture of sand and sawdust) and granular concrete with galvanized steel wires were used to model the soil–structure system. The seismic motion was input along the transversal direction of the two-story structure, including white noise and sinusoidal seismic excitations. Parallel tests of a single two-story station were correspondingly carried out as a contrast. Test data recorded by accelerometers and strain gauges are presented. The bending strains of the columns measured in the interchange station were found to be smaller than those in the single station. The concentration of the longitudinal strain was observed near the conjunction. Insights on the seismic response of the interchange station are provided.

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Seismic ground motion amplification pattern induced by a subway tunnel: Shaking table testing and numerical simulation

Cited by 99 publications

References 16 publications

Experimental study on seismic response of subway station built in loess

Experimental study on seismic response of subway station built in loess

Seismic performance of soil–tunnel–building systems in stiff soils

Shaking Table Test on the Response of a Cross Interchange Metro Station under Harmonic Excitations Refers to a Single Two-Storey Metro Station

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