Isolation mechanism of a subway station structure with flexible devices at column ends obtained in shaking-table tests

Liu, Zhi‐Qian; Chen, Zhiyi; Liang, Sunbin; Li, Chunxiang

doi:10.1016/j.tust.2020.103328

Cited by 40 publications

(6 citation statements)

References 20 publications

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“…SE and Sρ of the model soil were required to satisfy equation (1) and match the bearing capacity of the shaking table simultaneously. Previous tests (Liu et al, 2020) showed that a mixture of sand and sawdust can be used as model soils. When the mass ratio of sawdust to sand was set at 1:2.5, the density and shear modulus of the mixture were respectively 700 kg/m 3 and 1.81 MPa, meeting target values generally (i.e.…”

Section: Experimental Designmentioning

confidence: 99%

Seismic response characteristics of multi-story subway station through shaking table test

Chen

Huang

Chen

2021

Advances in Structural Engineering

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A series of shaking table tests were carried out to investigate the seismic response characteristics of a multi-story subway station. Dynamic responses, including accelerations of the soils and the underground structure, layer drift, dynamic earth pressure, and lateral deformation of soils were recorded and analyzed. Several seismic characteristics of multi-story subway station structures are figured out. It is found that in addition to the racking deformation, the rotation vibration is observed for the multi-story subway station subjected to acceleration waves. From the viewpoint of frequency, the low-frequency component and high-frequency component of the acceleration response of the subway station represent the translation and rotation component of the multi-story subway structure, respectively. In addition, the rotation vibration of the deep-depth structure leads to the local squeezing and detachment from the surrounding soils alternately at both top and bottom ends of the sidewalls. This results in the hump-shaped distribution of dynamic earth pressure. The racking deformation of the multi-story subway station has a linear relationship with the dynamic earth pressure at a certain area along the sidewall, where the top of hump-shaped distribution of dynamic earth pressure is.

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Section: Experimental Designmentioning

confidence: 99%

Seismic response characteristics of multi-story subway station through shaking table test

Chen

Huang

Chen

2021

Advances in Structural Engineering

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“…振动台模型试验中, Zheng等人 [29] 与Liu等人 [30] 设置支座的位置存在差异, Zheng等人 [29] 将支座设置于上下层柱底, 而Liu等人 [30] 将支座设置于上层柱顶和下层柱底. 为了探究支座位置对结构抗力韧性的影响, 此外, 研究者还将摩擦摆隔震支座 [15,33] 、加劲肋剪切板阻尼器 [34,35] 、铅芯橡胶隔震支座 [36,37] 、双向辊轴摩擦摆隔震支座 [38] 等应用于地下结构, 设置在中柱与顶梁之间来提高结构的抗力韧性.…”

Section: 在众多研究中得到了印证unclassified

Earthquake resilience of urban underground structures: State ofthe art

Lu¹,

Ma²,

Du³

et al. 2021

Sci. Sin.-Tech.

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“…Numerous analyses and investigations found that the center column was the weak location of the cast-in-place frame underground structure [14][15][16]. Many scholars carried out a large number of seismic design studies of the center column by installing isolation bearings to absorb seismic energy or changing the constraint conditions [17]. At present, the commonly used bearings mainly include rubber bearings and sliding bearings [18][19][20][21].…”

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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Isolation mechanism of a subway station structure with flexible devices at column ends obtained in shaking-table tests

Cited by 40 publications

References 20 publications

Seismic response characteristics of multi-story subway station through shaking table test

Seismic response characteristics of multi-story subway station through shaking table test

Earthquake resilience of urban underground structures: State ofthe art

Effect Mechanism of Connection Joints in Fabricated Station Structures

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