Zhejiang University benchmark centrifuge test for LEAP-GWU-2015 and liquefaction responses of a sloping ground

Zhou, Yan‐Guo; Sun, Zheng-Bo; Chen, Yunmin

doi:10.1016/j.soildyn.2017.03.010

Cited by 59 publications

(19 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pluviation devices and procedures lead to uncertainty in density within AE11 kg/m 3 with the achieved density. The degree of saturation for three models was not measured but based upon previous experience with this method (Zhou et al 2017), the achieved S r > 99.5%.…”

Section: Discussionmentioning

confidence: 99%

“…The LEAP-UCD-2017 tests of Zhejiang University were conducted using the ZJU-400 centrifuge with in-flight uniaxial shaker and BE testing system, which was described in detail in Zhou et al (2017).…”

Section: Test Facilitiesmentioning

confidence: 99%

“…In addition, surface markers made of zip ties were also used, and all the surface markers were installed in a 0.05 m Â 0.05 m grid (model scale). Colored sand columns following the same method as described in Zhou et al (2017) were used to determine lateral spread profiles by excavation after finally spin-down.…”

Section: Model Descriptionmentioning

confidence: 99%

“…Air pluviation method was adopted to ensure a high level of uniformity. The apparatus for air pluviation and construction procedures are available in Zhou et al (2017). The calibration results using the specified spout were different from that specified.…”

Section: Achieved Densitymentioning

confidence: 99%

“…Several numerical simulations showed great consistencies with experimental tests, providing a good opportunity for uncertainty and sensitivities analysis. For the purpose of repeatability and reproducibility, better practical experimental technology and measuring techniques were adopted in LEAP-UCD-2017 for uncertainty quantification and quality control, including CPT tests for density estimation, high-speed camera for tracing surface lateral displacement, and shear-wave velocity for detecting initial state of the model (Zhou et al 2017); other techniques like pressure sensors in RPI (Kokkali et al 2017) were also encouraged to use for an abundant dataset.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Specifications and Results of Centrifuge Model Test at Zhejiang University for LEAP-UCD-2017

Zhou

et al. 2019

Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading

Self Cite

View full text Add to dashboard Cite

Three dynamic centrifuge tests with different densities (corresponding to loose, medium dense, and dense deposits) were conducted at Zhejiang University for LEAP-UCD-2017 for an exercise of repeatability and reproducibility. The same model used in LEAP-GWU-2015 representing a 5-degree slope consisting of saturated Ottawa F-65 was repeated in 2017, but more rigorous protocols and new techniques (CPT and high-speed cameras) were included in Zhejiang University experiments. Test facilities and detailed modeling and testing procedures are presented; uncertainties in input parameters are also discussed. Preliminary results associated with selected experiment are presented.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Test Facilitiesmentioning

confidence: 99%

Section: Model Descriptionmentioning

confidence: 99%

Section: Achieved Densitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Specifications and Results of Centrifuge Model Test at Zhejiang University for LEAP-UCD-2017

Zhou

et al. 2019

Model Tests and Numerical Simulations of Liquefaction and Lateral Spreading

Self Cite

View full text Add to dashboard Cite

show abstract

Seismic response and failure mechanism of underground frame structures based on dynamic centrifuge tests

Zhang

et al. 2021

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

During the 1995 Kobe earthquake in Japan, the Daikai subway station suffered total collapse, which made the research on the seismic failure mechanism of underground frame structures become a hot topic. The author has carried out a lot of research on earthquake failure mechanism of underground frame structures based on numerical method. To validate and further study the seismic failure response and mechanism of underground frame structures, a series of comparative dynamic centrifuge tests were carried out. The research conclusions are as follows. The vertical earthquake action significantly increased the axial pressure on the columns of an underground frame structure, reducing their horizontal deformation capacity. The columns subjected to high axial compression were prone to brittle damage under a relatively strong horizontal earthquake, which led to the overall collapse of an underground frame structure. The areas near the intersection of the ceiling slab and the sidewalls were the weak part of the underground frame structure and were vulnerable to tensile cracks under earthquake. The columns' top and bottom were the fragile parts and were prone to concrete cracking or even shear failure under an earthquake. If the columns could remain intact and effectively provided vertical support under a strong earthquake, it was beneficial to reduce the risk of the overall collapse of an underground frame structure. K E Y W O R D Sdifferent deformation capacity of top slab and columns, dynamic centrifuge test, seismic failure response and mechanism, underground frame structure, vertical earthquake action

show abstract

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

View full text Add to dashboard Cite

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.

show abstract

Zhejiang University benchmark centrifuge test for LEAP-GWU-2015 and liquefaction responses of a sloping ground

Cited by 59 publications

References 29 publications

Specifications and Results of Centrifuge Model Test at Zhejiang University for LEAP-UCD-2017

Specifications and Results of Centrifuge Model Test at Zhejiang University for LEAP-UCD-2017

Seismic response and failure mechanism of underground frame structures based on dynamic centrifuge tests

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

Contact Info

Product

Resources

About