Centrifuge model testing to ascertain vertical displacements of a pile under cyclic lateral loads

Zheng, Gang; Sun, Junbo; Zhang, Tianqi; Jiao, Yang; Diao, Yu

doi:10.1631/jzus.a2000477

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…(1) Intermittent Loading Ratio Considering the intermittent nature of subway loading, the intermittent loading ratio is defined as the ratio of the intermittent loading duration ∆T and the functioning time of the subway loading T. The specific parameter settings for the intermittent loading ratio are determined as follows: since the typical subway train in Hefei City consists of six sections of Type B drum-shaped cars, with a length of approximately 120 m, and the train speed ranges from 30 to 80 km/h, the time taken for the subway to pass a specific point can be calculated as 5.4 s to 14.4 s. Taking 10 s as the time for the subway to pass a specific point, the intermittent duration is generally tens of times the running time [13]. The selected values for the intermittent loading ratio ∆T/T are 1, 5, 10, and 50, thus corresponding to intermittent durations of 10 s, 50 s, 100 s, and 500 s. A control experiment is also included with ∆T/T = 0.…”

Section: Determination Of Experimental Influencing Factorsmentioning

confidence: 99%

Research on the Accumulated Plastic Strain of Expansive Soil under Subway Loading

Zhu,

Guo,

Cheng

et al. 2023

Applied Sciences

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Expansive soil near Hefei Xinqiao International Airport was selected as the research focus. The effects of different loading modes on the dynamic strain of the saturated remodeled expansive soil was investigated by indoor dynamic triaxial tests and the effect of three factors, intermittent loading ratio, static deviatoric stress, and cyclic stress ratio, on the accumulated plastic strain of saturated remodeled expansive soil under intermittent subway cyclic loading was analyzed. Finally, the corresponding accumulated plastic strain calculation model was established based on the test results. The research results show that the loading modes do not affect the overall development mode of the strain and, under intermittent loading, the strain tends to be more stable. Under intermittent loading, when the number of cycles is the same, the larger the intermittent loading ratio, the smaller the accumulated plastic strain. The effect of static deviatoric stress and cyclic stress ratio on strain accumulation is significant. Based on the hyperbolic model, an accumulated plastic strain calculation model related to the number of cycles of remolded expansive soil under the load of the Hefei subway was proposed, which has a certain reference significance for the design, safety assessment, and safe operation of the Hefei subway.

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Section: Determination Of Experimental Influencing Factorsmentioning

confidence: 99%

Research on the Accumulated Plastic Strain of Expansive Soil under Subway Loading

Zhu,

Guo,

Cheng

et al. 2023

Applied Sciences

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“…In studying the impact of subway loads on pore pressure in expansive soils, several key factors must be taken into consideration. Firstly, subway loads are discontinuous and exert only compressive stresses on the soil [11], and the passage of a subway train can also induce transient shear stresses within the soil. Furthermore, the development of pore pressure is influenced by various factors, including soil structure, the type of train load during operation, stress amplitudes, frequencies, the number of loading cycles, and drainage conditions, among others.…”

Section: Introductionmentioning

confidence: 99%

Research on the Accumulated Pore Pressure of Expansive Soil under Subway Loading

Qing,

Zhu,

Guo

et al. 2023

Buildings

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Taking the expansive soil near Hefei Xinqiao International Airport as the research subject, indoor dynamic triaxial tests were conducted to investigate the influence of different loading methods on the dynamic pore pressure of saturated remolded expansive soil on the basis of maximally simulating the real characteristics of subway loading. Furthermore, the action laws of three factors, namely intermittent loading ratio, static deviator stress, and cyclic stress ratio, on the accumulated pore pressure of saturated remolded expansive soil under intermittent subway cyclic loading were analyzed. The research results indicate that the loading method significantly affects the development trend of the accumulated pore pressure. Under similar conditions, a larger intermittent loading ratio leads to smaller accumulated pore pressure values and a slower initial development rate of pore pressure under the same cycle vibration. Increasing static deviatoric stress promotes the accumulation of pore pressure. The influence of the cyclic stress ratio is dependent on the intermittent loading ratio and does not follow a consistent pattern.

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Numerical investigation on lateral monotonic and cyclic responses of scoured rigid monopile based on an integrated bounding surface model

Zheng,

Zhang,

Liang

et al. 2024

Computers and Geotechnics

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Centrifuge model testing to ascertain vertical displacements of a pile under cyclic lateral loads

Cited by 4 publications

References 12 publications

Research on the Accumulated Plastic Strain of Expansive Soil under Subway Loading

Research on the Accumulated Plastic Strain of Expansive Soil under Subway Loading

Research on the Accumulated Pore Pressure of Expansive Soil under Subway Loading

Numerical investigation on lateral monotonic and cyclic responses of scoured rigid monopile based on an integrated bounding surface model

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