Centrifuge shaking table tests on 4 × 4 pile groups in liquefiable ground

Liu, Xing; Wang, Rui; Zhang, Jianmin

doi:10.1007/s11440-018-0699-5

Cited by 48 publications

(10 citation statements)

References 31 publications

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“…Many attempts have been made through laboratory centrifuge tests, [5][6][7][8][9][10][11][12][13] shake-table tests, [14][15][16][17][18][19][20][21][22] and in-situ blast tests. Many attempts have been made through laboratory centrifuge tests, [5][6][7][8][9][10][11][12][13] shake-table tests, [14][15][16][17][18][19][20][21][22] and in-situ blast tests.…”

Section: Introductionmentioning

confidence: 99%

“…Previous experimental studies mainly focus on the seismic behavior of piles and pile-supported structures (e.g., bridges and buildings) in liquefiable soils alone, without considering scour effects. Many attempts have been made through laboratory centrifuge tests, [5][6][7][8][9][10][11][12][13] shake-table tests, [14][15][16][17][18][19][20][21][22] and in-situ blast tests. [23][24][25] Centrifuge tests generally use model-scaled metal piles because reinforced concrete (RC) piles cannot be largely scaled down with RC materials.…”

Section: Introductionmentioning

confidence: 99%

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Shake‐table investigation of scoured RC pile‐group‐supported bridges in liquefiable and nonliquefiable soils

Wang

Shang

2019

Earthq Engng Struct Dyn

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Summary This paper presents results of one‐g shake‐table tests on scoured pile‐group‐supported bridge models in saturated (liquefiable) and dry (nonliquefiable) sands. The primary objective is to reveal the influence of liquefaction on seismic demands and failure mechanism of scoured bridges. To this end, two identical models, each consisting of a 2 × 2 reinforced concrete pile‐group with a center‐to‐center spacing of 3 times pile diameter, a cap and a single pier with a lumped iron block, were constructed and embedded into saturated and dry sands, respectively, with the same scour depth of 4 times pile diameter. Typical test results, including excess pore pressure, acceleration and displacement demands are interpreted first, followed by the focus on curvature demands and associated seismic failure mechanism identification. Finally, inertial and kinematic effects on pile curvature demands are estimated using cross‐correlation analyses. Results show that near‐pile liquefied soils exhibit more remarkable dilation tendency as compared to far field. For bridges under the given scour depth, soil liquefaction tends to significantly affect the failure modes via transferring damage positions from pier bottom to pile head and meanwhile from underground pile to pile head. In addition, pile group effects appear to be significant in nonliquefiable soils while to be relatively inessential in liquefied soils. Moreover, the inertial effect is more prominent in nonliquefiable soils, while the kinematic effect itself generally appears to be more significant in liquefiable soils. The test results can be used to validate numerical models for future studies.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Shake‐table investigation of scoured RC pile‐group‐supported bridges in liquefiable and nonliquefiable soils

Wang

Shang

2019

Earthq Engng Struct Dyn

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“…Many centrifuge tests have been conducted to investigate the liquefaction‐induced lateral spreading and its effect on the piles 14–22 . These centrifuge tests involved different aspects of pile foundations subjected to lateral spreading.…”

Section: Introductionmentioning

confidence: 99%

“…Centrifuge shaking tests, [14][15][16][17][18][19][20][21][22] 1-g large-scale shaking tests, [23][24][25][26][27][28][29][30][31] and complex numerical models [32][33][34][35][36][37][38] were used to investigate the kinematic and inertial soil-structure interaction of piles in non-liquefiable and liquefiable sands. Centrifuge tests offer significant advantages in simulating high-stress levels using small-scale models.…”

Section: Introductionmentioning

confidence: 99%

“…17 Other centrifuge tests have reported the settlement behavior of piles in liquefied and laterally spreading soils, the effect of horizontal and vertical bidirectional motion, the response of wharf-pile systems, and the effect of kinematics. [18][19][20][21] Recently, liquefaction-induced downdrag on piles has been evaluated as well. 22 These studies have provided valuable insights.…”

Section: Introductionmentioning

confidence: 99%

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Inertial and kinematic interactions of bridge‐pile group subjected to liquefaction induced lateral spreading: Large‐scale shaking table experiments

Jia

Naggar

et al. 2023

Earthq Engng Struct Dyn

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This paper investigates the seismic bridge‐pile‐soil system failure mechanisms due to liquefaction‐induced lateral spreading. Two large‐scale shaking table tests were performed on pile groups with and without bridges in sloped liquefiable soils overlain by soil crust. The systems were subjected to a weak earthquake signal (Tabas 0.05 g) and a strong earthquake signal (Tabas 0.3 g). Their responses were recorded in terms of excess pore pressure, acceleration, and displacement time histories. The piles seismic failure mode and mechanism are described based on the obtained results. In addition, the inertial and kinematic interaction effects on the piles’ deflection were evaluated. The results demonstrated that the bridge had no significant effect on the seismic response of the pile‐soil system under weak earthquakes. Meanwhile, the test model without a bridge experienced more significant soil lateral displacement, and the saturated sand exhibited dilatant behavior, and amplified the acceleration peak response during the strong earthquake. Moreover, the liquefaction‐induced lateral spreading moved the vulnerable position of the pile group bridge system from the pier bottom to the pile head, which changed the failure mode of the pile head. The results also revealed that, compared with weak earthquake excitation, the kinematic effect was significantly enhanced, and the inertia effect was weakened during strong earthquakes. Moreover, the pile curvature during both weak and strong earthquakes was inversely proportional to the bridge inertial load.

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Evaluation of Seismic Response of Rectangular Underground Structures in Liquefiable Soils

Zhu

Wang

Zhang

et al. 2021

Challenges and Innovations in Geomechanics

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Centrifuge shaking table tests on 4 × 4 pile groups in liquefiable ground

Cited by 48 publications

References 31 publications

Shake‐table investigation of scoured RC pile‐group‐supported bridges in liquefiable and nonliquefiable soils

Shake‐table investigation of scoured RC pile‐group‐supported bridges in liquefiable and nonliquefiable soils

Inertial and kinematic interactions of bridge‐pile group subjected to liquefaction induced lateral spreading: Large‐scale shaking table experiments

Evaluation of Seismic Response of Rectangular Underground Structures in Liquefiable Soils

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