Shaking table test for seismic optimization of soil slope reinforced by new EPS pile under earthquake

Pai, Lifang; Wu, Honggang; Guan, Wei; Wei, Hong; Tang, Lin

doi:10.1016/j.soildyn.2021.107140

Cited by 11 publications

(3 citation statements)

References 23 publications

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“…For this awareness, there will be a demand in seismic response analysis of structural system using all three translational components of ground motion. Since the vertical ground motion is known to have little influence on ordinary building or wharf structures, only the horizontal ground motions attract widespread attention of researchers [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Magnification factor for pile internal forces of pile‐supported wharves under bi‐directional ground motions

Feng,

Gao,

Jing

2024

The Journal of Engineering

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In order to determine the pile internal forces of wharf under simultaneous seismic excitation in orthogonal horizontal directions with ease, the total internal forces can be obtained by multiplying the pile forces of two‐dimensional model under transverse earthquake loading with a magnification factor. The factors were computed from the seismic response of wharves having various aspect ratios (length to width) and eccentricity ratios when subjected to 30 pairs of bi‐directional earthquake records. Mean magnification factors and their corresponding dispersion are presented for all ground motion ensembles. The influence of aspect ratio and eccentricity ratio is evaluated and discussed. It is concluded that the magnification factor can be expressed as the function of aspect ratio and eccentricity ratio, and follows lognormal distribution. The proposed equation of magnification factor can be an alternative for internal force analysis of wharves under bi‐directional ground motion.

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Section: Introductionmentioning

confidence: 99%

Magnification factor for pile internal forces of pile‐supported wharves under bi‐directional ground motions

Feng,

Gao,

Jing

2024

The Journal of Engineering

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“…The influence of structure height, the number of structures, the composition of the structure group, and seismic records was considered. Pai [4] set up a comparison of conventional pile types under the same test conditions, and a series of shaking table tests. The distribution and spatial variation of acceleration and the dynamic soil pressure response of a soil slope strengthened by EPS pile under earthquake action were studied.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Duration Compression Ratio of the Input Motion on the Seismic Response of a Soil–Pile–Bridge Structure System in Shaking Table Tests

Zhi

Song

et al. 2022

Applied Sciences

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In the shaking table test of a soil–pile–bridge structure system, it is difficult to keep the similarity relations of the model structure and that of the model soil consistent. Due to the difference of geometry and material similarity ratios for the model structure and model soil, the determination of the duration compression ratio of input motions is a key problem. The spectrum characteristics of input motions will be varied by the duration compression ratio so that the seismic responses of structure and soil system will be affected. There are three commonly used approaches to determine the duration compression ratio of input motions in shaking table tests: the time similarity ratio of model structure; the time similarity ratio of model soil; and uncompressed. To study the influence of the duration compression ratio on the seismic response of a soil–structure system in shaking table tests, the El Centro record and the Wolong record were chosen as the input motions, and the durations were compressed by the three commonly used approaches in this paper. The influence of the duration compression ratios of the input motions on the acceleration response of a soil–pile–bridge structure system was compared and analyzed through a series of shaking table tests. The results showed that the duration compression ratio affected the acceleration response of the model soil and the model structure, and the effect was more obvious when the peak ground acceleration (PGA) was small. If the research is focused on the seismic response of the soil, it is recommended to use the time similarity ratio of the model soil to compress the input motions. If the research is focused on the seismic response of the structure, it is recommended to use the time similarity ratio of the model structure to compress the input motions. This study could provide a reference for the design of the shaking table test of a soil–pile–bridge structure system.

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“…These earthquakes have triggered numerous seismic landslides [4][5][6] , and have caused significant harm to the lives and properties of the local people. Therefore, introducing seismic reinforcement design to counter landslides holds considerable importance, and numerous methods for seismic reinforcement have been successively proposed [7][8][9] . Among these, the effectiveness of the seismic performance of the pile-anchor system has been widely recognized after several earthquakes, and has become one of the main methods of slope reinforcement in strong earthquake-prone areas.…”

mentioning

confidence: 99%

A multi-objective optimization evaluation model for seismic performance of slopes reinforced by pile-anchor system

Xue,

Li,

et al. 2024

Sci Rep

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The significance means of the seismic reinforcement effect of a pile-anchor system for slope reinforcement has been widely recognized. However, cases of deformation failure and instability sliding of the pile-anchor system itself and the reinforced slope under seismic action continue to be recorded. Therefore, it is crucial to evaluate the seismic performance of slopes reinforced by a pile-anchor system to prevent the system’s failure. Current evaluation models of a slope reinforced by a pile-anchor system mainly focus on slope stability; however, the safety of the pile-anchor system itself is not sufficiently considered in these models. Consequently, in this study, we propose a multi-objective optimization evaluation (MOE) model for evaluating the seismic performance of slopes reinforced by a pile-anchor system that considers slope stability, safety of the pile-anchor system, and dynamic response of the slope. This model considers slope displacement, acceleration amplification factor of a slope, pile displacement, and anchor displacement as negative indexes, and anti-slide pile bending moment, shear force, and anchor axial force as intermediate indexes. The comprehensive weight of relevant indexes is obtained by combining subjective and objective weights, and the seismic reinforcement effect of the pile-anchor system is evaluated subsequently. In conclusion, the MOE model proposed in this study provides a novel solution for the optimization evaluation of a slope reinforced by a pile-anchor system in forthcoming projects.

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Shaking table test for seismic optimization of soil slope reinforced by new EPS pile under earthquake

Cited by 11 publications

References 23 publications

Magnification factor for pile internal forces of pile‐supported wharves under bi‐directional ground motions

Magnification factor for pile internal forces of pile‐supported wharves under bi‐directional ground motions

Influence of the Duration Compression Ratio of the Input Motion on the Seismic Response of a Soil–Pile–Bridge Structure System in Shaking Table Tests

A multi-objective optimization evaluation model for seismic performance of slopes reinforced by pile-anchor system

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