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Shaking table test for seismic optimization of soil slope reinforced by new EPS pile under earthquake
https://orcid.org/0000-0001-7061-5009
https://orcid.org/0000-0003-2685-7902
https://orcid.org/0000-0002-0080-6771
https://orcid.org/0000-0003-4635-371X
https://orcid.org/0000-0002-7246-5398
Abstract To explore the optimal seismic performance of new EPS pile, we carried out a series of shaking table test by comparing different pile types. We measured and obtained the seismic data with various attributes, such as the characteristic image of different probability horizontal seismic action, acceleration and dynamic soil pressure. By analyzing the time-domain characteristics of multi-attribute data such as deformation characteristics and acceleration, we revealed the instability mode of the slope model and the regional response characteristics of particle spatial position. Based on the Fast Fourier Transform (FFT) and Statistical Probability Sperm Matrix (SPSM), we proposed the damage level correlation between the spectral characteristics of acceleration and dynamic soil pressure. We obtained the relationship between the variation of the frequency and specific period between acceleration and dynamic soil pressure at different seismic stages through in-depth study, and then calculated the regional differences of spectrum displacement (S d) by using Seism Signal. In the frequency domain of acceleration and dynamic soil pressure signals, the predominant frequencies were mostly concentrated in 0.5–8 Hz. Under high seismic acceleration, the amplitude frequency of acceleration spectrum of conventional pile and EPS pile was both 1.51 Hz, and the dominant frequency of dynamic soil pressure was significantly different. There was a positive correlation between seismic acceleration and dynamic soil pressure. The shift of frequency profile and main frequency band of EPS pile was mainly caused by the propagation stage after the acceleration main shock. Under high seismic acceleration, the deformation of EPS pile and conventional pile occurred to some extent. EPS plate was used as the damping layer to buffer and dissipated the deformation of the slope under earthquake, and its effect was linked to the seismic data attributes. The spectral displacement of EPS pile was reduced as a whole was higher than that of conventional pile. The slip surface of pile body was sensitive to earthquake, and it was easy to become the weak seismic link of the EPS pile. These results are helpful for us to provide a theoretical basis for improving the reliability optimization design of dynamic parameters of the pile structure.
Highlights For the first time, we carried out the shaking table test of new type EPS pile for soil slope reinforcement. We revealed the regional response characteristics of EPS pile particle spatial position. We obtained the damage level correlation between acceleration and dynamic soil pressure spectral characteristics. We proposed the relationship of frequency between acceleration and dynamic soil pressure at different vibration stages. We obtained the regional difference of the deformation and Sd of the EPS pile during the seismic action.
Shaking table test for seismic optimization of soil slope reinforced by new EPS pile under earthquake
https://orcid.org/0000-0001-7061-5009
https://orcid.org/0000-0003-2685-7902
https://orcid.org/0000-0002-0080-6771
https://orcid.org/0000-0003-4635-371X
https://orcid.org/0000-0002-7246-5398
Abstract To explore the optimal seismic performance of new EPS pile, we carried out a series of shaking table test by comparing different pile types. We measured and obtained the seismic data with various attributes, such as the characteristic image of different probability horizontal seismic action, acceleration and dynamic soil pressure. By analyzing the time-domain characteristics of multi-attribute data such as deformation characteristics and acceleration, we revealed the instability mode of the slope model and the regional response characteristics of particle spatial position. Based on the Fast Fourier Transform (FFT) and Statistical Probability Sperm Matrix (SPSM), we proposed the damage level correlation between the spectral characteristics of acceleration and dynamic soil pressure. We obtained the relationship between the variation of the frequency and specific period between acceleration and dynamic soil pressure at different seismic stages through in-depth study, and then calculated the regional differences of spectrum displacement (S d) by using Seism Signal. In the frequency domain of acceleration and dynamic soil pressure signals, the predominant frequencies were mostly concentrated in 0.5–8 Hz. Under high seismic acceleration, the amplitude frequency of acceleration spectrum of conventional pile and EPS pile was both 1.51 Hz, and the dominant frequency of dynamic soil pressure was significantly different. There was a positive correlation between seismic acceleration and dynamic soil pressure. The shift of frequency profile and main frequency band of EPS pile was mainly caused by the propagation stage after the acceleration main shock. Under high seismic acceleration, the deformation of EPS pile and conventional pile occurred to some extent. EPS plate was used as the damping layer to buffer and dissipated the deformation of the slope under earthquake, and its effect was linked to the seismic data attributes. The spectral displacement of EPS pile was reduced as a whole was higher than that of conventional pile. The slip surface of pile body was sensitive to earthquake, and it was easy to become the weak seismic link of the EPS pile. These results are helpful for us to provide a theoretical basis for improving the reliability optimization design of dynamic parameters of the pile structure.
Highlights For the first time, we carried out the shaking table test of new type EPS pile for soil slope reinforcement. We revealed the regional response characteristics of EPS pile particle spatial position. We obtained the damage level correlation between acceleration and dynamic soil pressure spectral characteristics. We proposed the relationship of frequency between acceleration and dynamic soil pressure at different vibration stages. We obtained the regional difference of the deformation and Sd of the EPS pile during the seismic action.
Shaking table test for seismic optimization of soil slope reinforced by new EPS pile under earthquake
https://orcid.org/0000-0001-7061-5009
https://orcid.org/0000-0003-2685-7902
https://orcid.org/0000-0002-0080-6771
https://orcid.org/0000-0003-4635-371X
https://orcid.org/0000-0002-7246-5398
Abstract To explore the optimal seismic performance of new EPS pile, we carried out a series of shaking table test by comparing different pile types. We measured and obtained the seismic data with various attributes, such as the characteristic image of different probability horizontal seismic action, acceleration and dynamic soil pressure. By analyzing the time-domain characteristics of multi-attribute data such as deformation characteristics and acceleration, we revealed the instability mode of the slope model and the regional response characteristics of particle spatial position. Based on the Fast Fourier Transform (FFT) and Statistical Probability Sperm Matrix (SPSM), we proposed the damage level correlation between the spectral characteristics of acceleration and dynamic soil pressure. We obtained the relationship between the variation of the frequency and specific period between acceleration and dynamic soil pressure at different seismic stages through in-depth study, and then calculated the regional differences of spectrum displacement (S d) by using Seism Signal. In the frequency domain of acceleration and dynamic soil pressure signals, the predominant frequencies were mostly concentrated in 0.5–8 Hz. Under high seismic acceleration, the amplitude frequency of acceleration spectrum of conventional pile and EPS pile was both 1.51 Hz, and the dominant frequency of dynamic soil pressure was significantly different. There was a positive correlation between seismic acceleration and dynamic soil pressure. The shift of frequency profile and main frequency band of EPS pile was mainly caused by the propagation stage after the acceleration main shock. Under high seismic acceleration, the deformation of EPS pile and conventional pile occurred to some extent. EPS plate was used as the damping layer to buffer and dissipated the deformation of the slope under earthquake, and its effect was linked to the seismic data attributes. The spectral displacement of EPS pile was reduced as a whole was higher than that of conventional pile. The slip surface of pile body was sensitive to earthquake, and it was easy to become the weak seismic link of the EPS pile. These results are helpful for us to provide a theoretical basis for improving the reliability optimization design of dynamic parameters of the pile structure.
Highlights For the first time, we carried out the shaking table test of new type EPS pile for soil slope reinforcement. We revealed the regional response characteristics of EPS pile particle spatial position. We obtained the damage level correlation between acceleration and dynamic soil pressure spectral characteristics. We proposed the relationship of frequency between acceleration and dynamic soil pressure at different vibration stages. We obtained the regional difference of the deformation and Sd of the EPS pile during the seismic action.
Shaking table test for seismic optimization of soil slope reinforced by new EPS pile under earthquake
Pai, Li fang (author) / Wu, Hong gang (author) / Guan, Wei (author) / Wei, Hong (author) / Tang, Lin (author)
2021-12-29
Article (Journal)
Electronic Resource
English
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