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Mechanical responses of multi-layered ground due to shallow tunneling with arbitrary ground surface load

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 745-762 doi: 10.1007/s11709-023-0935-4

Abstract: to shallow tunneling in multi-layered ground with an arbitrary ground surface load.To solve the proposed multi-boundary problem, a series of analytic functions is introduced to accuratelyBased on the principle of linear-elastic superposition, the multi-boundary problem is converted intoin multi-layered ground; thus, it can be used with assurance to estimate the ground movement and surfacecomposite ground.

Keywords： analytical model     mechanical response     multi-layered ground     shallow tunneling     ground surface load    

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Quantification of seepage in a multi-layered disconnected river-aquifer system

Jiang LI, Haizhu HU, Xiaomin MAO, Yi LIU

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2,   Pages 237-245 doi: 10.15302/J-FASE-2017135

Abstract: The vadose zone under riverbeds usually exhibits a multi-layered structure, particularly when paved withrate by assessing the dominant low permeability layers (including but not limited to the liners) in multi-layered

Keywords： infiltration     low permeability liner     multi-layered porous media     river-aquifer seepage    

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Anisotropy of multi-layered structure with sliding and bonded interlayer conditions

Lingyun YOU, Kezhen YAN, Jianhong MAN, Nengyuan LIU

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 632-645 doi: 10.1007/s11709-020-0617-4

Abstract: A better understanding of the mechanical behavior of the multi-layered structure under external loadingobjective of this study are to propose and develop an analytical solution for the mechanical behaviors of multi-layeredaxisymmetric loading, and to investigate the impact of anisotropic layers and interlayer conditions on the multi-layeredThen the global matrix technique is applied to achieve the analytical solution of multi-layered structureflexible pavement was applied as the computing carrier of numerical analysis for the multi-layered structure

Keywords： multi-layered structure     Hankel transformation     anisotropic     transversely isotropic     interlayer condition    

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Assessing artificial neural network performance for predicting interlayer conditions and layer modulus of multi-layered

Lingyun YOU, Kezhen YAN, Nengyuan LIU

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 487-500 doi: 10.1007/s11709-020-0609-4

Abstract: artificial neural network (ANN) approach for predicting interlayer conditions and layer modulus of a multi-layered

Keywords： asphalt pavement     interlayer conditions     finite element method     artificial neural network     back-calculation    

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purification of trace thallium(I)-contaminated potable water using a high-selective filter paper with multi-layered

Frontiers of Chemical Science and Engineering doi: 10.1007/s11705-023-2379-8

Abstract: This report proposes the multi-layered Prussian blue (PB)-decorated composite membranes (PBxmulti-layeredThe double-layered PB2@PDA/PEI-FP membrane showed the maximum sorption capacity, but its Tl

Keywords： membrane adsorption     Prussian blue     energy-free filtration     potable water     trace thallium(I)    

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A numerical framework for underground structures in layered ground under inclined P-SV waves using stiffness

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 10-24 doi: 10.1007/s11709-022-0904-3

Abstract: A numerical framework was proposed for the seismic analysis of underground structures in layered groundproviding comparisons with analytical solutions for cases involving free-field responses of homogeneous ground, layered ground, and pressure-dependent heterogeneous ground, as well as for an example of a soil–structureframework exhibits the advantage of incorporating oblique incident waves in a nonlinear heterogeneous ground

Keywords： underground structures     seismic response     stiffness matrix method     domain reduction method     P-SV waves    

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Design scheme and implementation for HY-2 ground segment mission control

Lan Youguo,Lin Mingsen,Xie Chunhua

Strategic Study of CAE 2014, Volume 16, Issue 6,   Pages 13-20

Abstract:

Design scheme and implementation for HY-2 ground segment is introducedMission control subsystem is responsible for task scheduling，and system monitor，is nerve center of groundIn order to reduce scheduling complexity，layered scheduling model is used because of complexity of data

Keywords： HY-2 ground segmentapplication system     architecture     layered scheduling system     operational model    

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Development Strategy for Air–Ground Collaborative Multi-Modal Intelligent Robot System

Huang Qiang, Meng Fei, Yu Zhangguo, Lin Defu, Xu Bin, Duo Yingxian

Strategic Study of CAE 2021, Volume 23, Issue 5,   Pages 116-121 doi: 10.15302/J-SSCAE-2021.05.015

Abstract:

An air–ground collaborative multi-modal intelligent robot systemcan adapt to air and ground environments, has multimodal characteristic and advanced intelligence, andConsidering the major demand for developing the air–ground collaborative multi-modal intelligentChina currently lags behind the international advanced level in terms of the air–ground collaborativeResearch shows that the air–ground collaborative multi-modal intelligent robot system can be integrated

Keywords： intelligent robot     air–ground collaboration     multi-modal     artificial intelligence    

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Stability analysis of layered slopes in unsaturated soils

Guangyu DAI; Fei ZHANG; Yuke WANG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 3,   Pages 378-387 doi: 10.1007/s11709-022-0808-2

Abstract: This study presents stability analyses of layered soil slopes in unsaturated conditions and uses a limitAn example of a two-layered slope in clay and silt is selected to verify the used method by comparingParametric analyses are conducted to explore the influences of the matric suction on the stability of layeredresults show that larger suction stress provided in unsaturated clay dominates the stability of the layeredInfiltration/evaporation can obviously affect the stability of unsaturated layered slopes, but their

Keywords： slope stability     suction stress     unsaturated soil     layered slope     limit equilibrium    

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Crack evolution of soft–hard composite layered rock-like specimens with two fissures under uniaxial compression

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1372-1389 doi: 10.1007/s11709-021-0772-2

Abstract: Acoustic emission and digital image correlation were used to study the spatiotemporal evolution characteristics of crack extension of soft and hard composite laminated rock masses (SHCLRM) containing double fissures under uniaxial compression. The effects of different rock combination methods and prefabricated fissures with different orientations on mechanical properties and crack coalescence patterns were analyzed. The characteristics of the acoustic emission source location distribution, and frequency changes of the crack evolution process were also investigated. The test results show that the damage mode of SHCLRM is related to the combination mode of rock layers and the orientation of fractures. Hard layers predominantly produce tensile cracks; soft layers produce shear cracks. The first crack always sprouts at the tip or middle of prefabricated fractures in hard layers. The acoustic emission signal of SHCLRM with double fractures has clear stage characteristics, and the state of crack development can be inferred from this signal to provide early warning for rock fracture instability. This study can provide a reference for the assessment of the fracture development status between adjacent roadways in SHCLRM in underground mines, as well as in roadway layout and support.

Keywords： soft−hard composite layered rock mass     double cracks     crack evolution     acoustic emission     digital image    

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Hierarchically porous cellulose nanofibril aerogel decorated with polypyrrole and nickel-cobalt layered

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1593-1607 doi: 10.1007/s11705-023-2348-2

Abstract: as a substrate to integrate highly conductive polypyrrole and active nanoflower-like nickel-cobalt layered

Keywords： cellulose nanofibril     aerogel     nickel-cobalt layered double hydroxide     polypyrrole     nonenzymatic glucose    

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Hydraulic fracturing pressure of concentric double-layered cylinder in cohesive soil

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 937-947 doi: 10.1007/s11709-021-0754-4

Abstract: This study aims to investigate hydrofracturing in double-layered soil through theoretical and experimentalis a linear relationship between the fracturing pressure and confining pressure in concentric double-layered

Keywords： hydraulic fracturing pressure     layered     cavity expansion theory     triaxial fracturing test     cohesive soil    

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Size effects in two-dimensional layered materials modeled by couple stress elasticity

Wipavee WONGVIBOONSIN, Panos GOURGIOTIS, Chung Nguyen VAN, Suchart LIMKATANYU, Jaroon RUNGAMORNRAT

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 425-443 doi: 10.1007/s11709-021-0707-y

Abstract: In the present study, the effect of material microstructure on the mechanical response of a two-dimensional elastic layer perfectly bonded to a substrate is examined under surface loadings. In the current model, the substrate is treated as an elastic half plane as opposed to a rigid base, and this enables its applications in practical cases when the modulus of the layer (e.g., the coating material) and substrate (e.g., the coated surface) are comparable. The material microstructure is modeled using the generalized continuum theory of couple stress elasticity. The boundary value problems are formulated in terms of the displacement field and solved in an analytical manner via the Fourier transform and stiffness matrix method. The results demonstrate the capability of the present continuum theory to efficiently model the size-dependency of the response of the material when the external and internal length scales are comparable. Furthermore, the results indicated that the material mismatch and substrate stiffness play a crucial role in the predicted elastic field. Specifically, the study also addresses significant discrepancy of the response for the case of a layer resting on a rigid substrate.

Keywords： cosserat     layered materials     size effects     microstructure    

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New pseudo-dynamic analysis of two-layered cohesive-friction soil slope and its numerical validation

Suman HAZARI, Sima GHOSH, Richi Prasad SHARMA

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1492-1508 doi: 10.1007/s11709-020-0679-3

Abstract: study, the limit equilibrium modified pseudo-dynamic method is used to analyze the stability of two-layeredThe zero-stress boundary condition at the ground surface under the seismic loading condition is satisfiedformulations derived from an analytical method are proposed for the predicting the seismic response in two-layered

Keywords： layered soil     limit equilibrium method     seismic analysis     damping     PLAXIS    

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Synergistic effect of V and Fe in Ni/Fe/V ternary layered double hydroxides for efficient and durable

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 102-115 doi: 10.1007/s11705-022-2179-6

Abstract: Herein, via a one-pot hydrothermal method, Ni/Fe/V ternary layered double hydroxides (NiFeV-LDH) derived

Keywords： oxygen evolution reaction     electrocatalysts     ternary layered double hydroxides     long-term stability    

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Title Author Date Type Operation

Mechanical responses of multi-layered ground due to shallow tunneling with arbitrary ground surface load

Journal Article

Quantification of seepage in a multi-layered disconnected river-aquifer system

Jiang LI, Haizhu HU, Xiaomin MAO, Yi LIU

Journal Article

Anisotropy of multi-layered structure with sliding and bonded interlayer conditions

Lingyun YOU, Kezhen YAN, Jianhong MAN, Nengyuan LIU

Journal Article

Assessing artificial neural network performance for predicting interlayer conditions and layer modulus of multi-layered

Lingyun YOU, Kezhen YAN, Nengyuan LIU

Journal Article

purification of trace thallium(I)-contaminated potable water using a high-selective filter paper with multi-layered

Journal Article

A numerical framework for underground structures in layered ground under inclined P-SV waves using stiffness

Journal Article

Design scheme and implementation for HY-2 ground segment mission control

Lan Youguo,Lin Mingsen,Xie Chunhua

Journal Article

Development Strategy for Air–Ground Collaborative Multi-Modal Intelligent Robot System

Huang Qiang, Meng Fei, Yu Zhangguo, Lin Defu, Xu Bin, Duo Yingxian

Journal Article

Stability analysis of layered slopes in unsaturated soils

Guangyu DAI; Fei ZHANG; Yuke WANG

Journal Article

Crack evolution of soft–hard composite layered rock-like specimens with two fissures under uniaxial compression

Journal Article

Hierarchically porous cellulose nanofibril aerogel decorated with polypyrrole and nickel-cobalt layered

Journal Article

Hydraulic fracturing pressure of concentric double-layered cylinder in cohesive soil

Journal Article

Size effects in two-dimensional layered materials modeled by couple stress elasticity

Wipavee WONGVIBOONSIN, Panos GOURGIOTIS, Chung Nguyen VAN, Suchart LIMKATANYU, Jaroon RUNGAMORNRAT

Journal Article

New pseudo-dynamic analysis of two-layered cohesive-friction soil slope and its numerical validation

Suman HAZARI, Sima GHOSH, Richi Prasad SHARMA

Journal Article

Synergistic effect of V and Fe in Ni/Fe/V ternary layered double hydroxides for efficient and durable

Journal Article