Analysis of Dynamic Earth Pressure on Piles in Liquefiable Soils by 1g Shaking Table Tests

A retaining form of a shock-absorbing antislide pile is proposed for slope engineering. A flexible material (shock-absorption layer) is filled in front of an ordinary antislide pile, which is used to absorb a large amount of seismic energy, thereby decreasing the transmission of seismic energy to the antislide pile. The flexible material thus reduces the seismic response, hence improving the aseismic capacity of the antislide pile. To verify the seismic performance of the shock-absorbing antislide pile, a shaking table contrast test was conducted and the results were compared with those from an ordinary antislide pile. The test results show that the flexible material absorbs a portion of the seismic deformation of the slip mass, decreasing the final displacement of the shock-absorbing antislide pile compared to that of the ordinary antislide pile, thereby reducing the sensitivity of the pile body to the displacement. Under the same conditions, the acceleration response of the slope body at the same height is lower for the shock-absorbing antislide pile than that for the ordinary pile, with the seismic performance of the former being superior to that of the latter. Furthermore, the shock-absorbing antislide pile is similar to the ordinary pile in terms of the dynamic earth pressure distribution form of the pile shaft; however, its value is relatively smaller, and the former exhibits better dynamic stress performance than the latter. The test results should prove useful for aseismic design of slopes.

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Seismic Earth Pressures of Retaining Wall from Large Shaking Table Tests

Advances in Materials Science and Engineering ◽

10.1155/2015/836503 ◽

2015 ◽

Vol 2015 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Changwei Yang ◽

Jian Jing Zhang ◽

Qu Honglue ◽

Bi Junwei ◽

Liu Feicheng

Keyword(s):

Wenchuan Earthquake ◽

Retaining Wall ◽

Time History ◽

Earth Pressure ◽

Shaking Table ◽

Rock Foundation ◽

Shaking Table Tests ◽

The Wenchuan Earthquake ◽

Earth Pressures ◽

Soil Foundation

To ascertain seismic response of retaining wall in the Wenchuan earthquake, large shaking table tests are performed and an acceleration record is acted in 3 directions. In the tests, acceleration time history recorded at Wolong station in the Wenchuan earthquake is used to excite the model wall. Results from the tests show that the location of dynamic resultant earth pressure is 0.35–0.49 H from toe of the wall for road shoulder retaining wall on rock foundation, 0.33–0.42 H for embankment retaining wall on rock foundation, and 0.46–0.77 H for road shoulder retaining wall on soil foundation. Besides, dynamic earth pressure increases with the increase of ground shaking from 0.1 g to 0.9 g and the relationship is nonlinear. The distribution is closed to for PGA less than 0.4 g but larger for PGA larger than and equal to 0.4 g, especially on the soil foundation. After the comparison of measured earth pressures and theoretical results by pseudodynamic method and pseudostatic method, results of the former are consistent with those of the shaking table test, but results of the latter method are smaller than measured.

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Shaking Table Test on the Dynamic Earth Pressure of Cement-Mixed Ground

Ground Improvement Technologies and Case Histories ◽

10.3850/gi090 ◽

2009 ◽

Author(s):

Kiyonobu Kasama ◽

Kouki Zen ◽

Guangqi Chen

Keyword(s):

Shaking Table Test ◽

Earth Pressure ◽

Shaking Table ◽

Mixed Ground ◽

Dynamic Earth Pressure

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The Research of Seismic Active Earth Pressure with Mode of Translation by Horizontal Slices Analysis Method and Shaking Table Tests

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.90-93.1942 ◽

2011 ◽

Vol 90-93 ◽

pp. 1942-1949

Author(s):

Hong Sheng Ma ◽

Chang Wei Yang

Keyword(s):

Peak Ground Acceleration ◽

Retaining Wall ◽

Earth Pressure ◽

Shaking Table ◽

Active Earth Pressure ◽

Analysis Method ◽

Shaking Table Tests ◽

Computational Accuracy ◽

Ground Acceleration ◽

Seismic Active Earth Pressure

In order to get the seismic active earth pressure with the mode of translation, adopting some related assumptions of the M-O theory, this paper establishes the first-order differential equation of the Seismic active earth pressure by horizontal slices analysis method and gets the solution of the seismic active earth pressure by boundary conditions. This formula can solve the distribution of the seismic active earth pressure is nonlinear along the wall, the point of application of the dynamic active thrust which is the advantage of this formula and announces the decreasing process of the filling’s rupture angle with the increase of the horizontal peak ground acceleration (PGA) , as well. The rationality and validity of the formula is confirmed by the comparison between the results of the shaking table tests and the formula, respectively. If the retaining wall takes place the mode of translation, the point of application of the seismic active thrust ranges between 0.4 and 0.5 times wall’s height at the horizontal seismic peak ground acceleration (PGA)<0.4g.At the same time, the computational accuracy of the dynamic active thrust, their points of application and the angle of rupture increases with the increase of the horizontal peak ground acceleration at the horizontal PGA<1.0g, as the astigmatic of the retaining wall in highly seismic intensity region supplying the valuable reference.

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

Advances in Structural Engineering ◽

10.1177/1369433221993296 ◽

2021 ◽

pp. 136943322199329

Author(s):

Zhiyi Chen ◽

Pengfei Huang ◽

Wei Chen

Keyword(s):

Seismic Response ◽

Shaking Table Test ◽

Earth Pressure ◽

Frequency Component ◽

Shaking Table ◽

Dynamic Responses ◽

High Frequency Component ◽

Subway Station ◽

Response Characteristics ◽

Dynamic Earth Pressure

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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