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Application of coupled XFEM-BCQO in the structural optimization of a circular tunnel lining subjected to a ground

Nazim Abdul NARIMAN, Ayad Mohammad RAMADAN, Ilham Ibrahim MOHAMMAD

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1495-1509 doi: 10.1007/s11709-019-0574-y

Abstract: A new structural optimization method of coupled extended finite element method and bound constrained quadratic optimization method (XFEM-BCQO) is adopted to quantify the optimum values of four design parameters for a circular tunnel lining when it is subjected to earthquakes. The parameters are: tunnel lining thickness, tunnel diameter, tunnel lining concrete modulus of elasticity and tunnel lining concrete density. Monte-Carlo sampling method is dedicated to construct the meta models so that to be used for the BCQO method using matlab codes. Numerical simulations of the tensile damage in the tunnel lining due to a real earthquake in the literature are created for three design cases. XFEM approach is used to show the cracks for the mentioned design cases. The results of the BCQO method for the maximum design case for the tunnel tensile damage was matching the results obtained from XFEM approach to a fair extent. The new coupled approach manifested a significant capability to predict the cracks and spalling of the tunnel lining concrete under the effects of dynamic earthquakes.

Keywords： ovaling deformation     monte carlo sampling     XFEM-BCQO     maximum principal stress    

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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.The conformal mappings of different boundaries are independent of each other, which allows the stressin multi-layered ground; thus, it can be used with assurance to estimate the ground movement and surfaceMoreover, the solution for the ground stress distribution can be used to estimate the safety of a single-layercomposite ground.

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

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R&D of the ground-coupled heat pump technology in China

Nairen DIAO, Ping CUI, Junhong LIU, Zhaohong FANG,

Frontiers in Energy 2010, Volume 4, Issue 1,   Pages 47-54 doi: 10.1007/s11708-009-0080-3

Abstract: The ground-coupled heat pump (GCHP) systems have been identified as one of the best sustainable energyNew models are presented for efficient thermal analysis of ground heat exchangers, of which one- andtwo-dimensional solid cylindrical source models and their analytical solutions are devised to deal with pile ground

Keywords： ground source heat pump     ground heat exchanger     HVAC     China    

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INTERACTIONS BETWEEN ABOVE AND BELOW GROUND PLANT STRUCTURES: MECHANISMS AND ECOSYSTEM SERVICES

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 2,   Pages 197-213 doi: 10.15302/J-FASE-2021433

Abstract:

Interactions between above and below ground parts of plants can be considered under the (overlappingSolar energy powers photosynthesis and transpiration by above ground structures, and drives most wateruptake through roots and supplies energy as organic matter to below ground parts, including diazotrophicNO3– assimilation of above ground parts requires organic N transportInteraction of above and below ground plant parts is an important component of the ecosystem service

Keywords： aerenchyma / carbon accumulation / hormones / phloem / xylem    

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Shanghai center project excavation induced ground surface movements and deformations

Guolin XU, Jiwen ZHANG, Huang LIU, Changqin REN

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 1,   Pages 26-43 doi: 10.1007/s11709-017-0439-1

Abstract: The following main items related to ground surface movements and deformations were collected: (1) wallsand circumferential soils lateral movements; (2) peripheral soil deflection in layers and ground settlements

Keywords： deep excavation     foundation pit     soft clay     top-down method     field observation     ground surface movements     ground    

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Seismic ground motion analysis of Shanghai Pudong Airport site considering the effects of spatial correlation

JIANG Tong, CHEN Laiyun, XING Hailing, L? Xilin

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 4,   Pages 430-435 doi: 10.1007/s11709-007-0058-3

Abstract: The spatial correlation of seismic ground motion, as well as the amplification of soft alluvium and theThe surface ground motion was calculated under incidence of the spatially correlative seismic motionFinally, some characteristics of seismic ground motion calculated for previously mentioned cases are

Keywords： surface ground     horizontal uniform     Finally     seismic ground     correlative seismic    

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Pondering over the scientific thinking of earthquake prediction from the miss report of Wenchuan Earthquake—re-discussing Li Siguang’s earthquake prediction thought

Zhao Wenjin

Strategic Study of CAE 2009, Volume 11, Issue 6,   Pages 4-15

Abstract: prediction precursor of short-term and impending earthquake, seismometry application limitation and groundstress transfer and track, and put forward 9 suggestions for future earthquake prediction.

Keywords： Wenchuan Earthquake     earthquake prediction     ground stress     Li Siguang    

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Evaluation of the performance of a centralized ground-water heat pump system in cold climate region

Shilei LU,Zhe CAI,Li ZHANG,Yiran LI

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 394-402 doi: 10.1007/s11708-014-0310-1

Abstract: The aim of this study is to evaluate the performance of a centralized open-loop ground-water heat pump

Keywords： ground-water heat pump (GWHP)     actual coefficient of performance     heat transfixion    

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Optimisation for interconnected energy hub system with combined ground source heat pump and borehole

Da HUO, Wei WEI, Simon Le BLOND

Frontiers in Energy 2018, Volume 12, Issue 4,   Pages 529-539 doi: 10.1007/s11708-018-0580-0

Abstract: Ground source heat pumps (GSHP) give zero-carbon emission heating at a residential level.However, as the heat is discharged, the temperature of the ground drops, leading to a poorer efficiency

Keywords： borehole thermal storage     energy hub     ground source heat pumps (GSHP)     particle swarm optimisation    

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Numerical study on the seismic response of the underground subway station- surrounding soil mass-ground

Guobo WANG, Mingzhi YUAN, Xianfeng MA, Jun WU

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 4,   Pages 424-435 doi: 10.1007/s11709-016-0381-7

Abstract: Ground buildings constructed above metro station have increased very quickly due to the limited landIn this paper, the seismic response of the Underground subway station-Surrounding soil mass-Ground adjacentThe reciprocal influence between subway station and ground adjacent building, and their effects on thedimension, and the presence of underground structure has certain impact on the seismic response of groundDue to the presence of underground structure and ground adjacent building, the vertical acceleration

Keywords： underground subway station     ground adjacent building     seismic response    

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GENOME EDITING: A GROUND BREAKING RESEARCH HAS BEEN RANKED TOP 10 ENGINEERING FRONTS FROM 2017 TO 2021

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 2,   Pages 309-311 doi: 10.15302/J-FASE-2022440

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Lateral displacement of soft ground under vacuum pressure and surcharge load

Chin-Yee ONG, Jin-Chun CHAI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 239-248 doi: 10.1007/s11709-011-0110-1

Abstract: lateral displacement, while vacuum pressure will induce settlement and inward lateral displacement of a groundwere conducted to investigate the main influencing factors on lateral displacement of a soft clayey ground, lateral displacement reduces with the increase of the initial undrained shear strength ( ) of the groundTo predict the lateral displacement of a ground under the combination of surcharge load and vacuum pressure, the loading conditions in terms of and , and value of the ground have to be considered.

Keywords： vacuum consolidation     lateral displacement     PVD     finite element analysis     surcharge load    

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EFFECTS OF TRANSPORT STRESS ON THE INTESTINES INVOLVING NEURONAL NITRIC OXIDE SYNTHASE

Frontiers of Agricultural Science and Engineering   Pages 285-295 doi: 10.15302/J-FASE-2022469

Abstract:

● Transport stress declined the level of leukocytes including lymphocytes

Keywords： intestine     nNOS     nNOS-positive neurons     transport stress    

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Ground-to-Air Radar Jamming Syste——Functions in Current Local Conflict and Its Development Trend

Zhang Xixiang

Strategic Study of CAE 2000, Volume 2, Issue 7,   Pages 55-65

Abstract:

This paper describes the development of the ground-to-air jammer.Initially this equipment can only jam the bomb-aiming radar, but now it has evolved into a ground-to-airIf they had got the ground-to-air jamming equipment deployed in their air defense system, they would

The paper concludes that the ground-to-air jamming system plays a very important role in theThe ground-to-air jamming system will have a bright future.

Keywords： ground-to-air jamming system     functions in current conflict     development trend    

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The issues related to determination of site specific design ground motion for nuclear power plants in

Li Xiaojun,He Qiumei,Hou Chunlin

Strategic Study of CAE 2013, Volume 15, Issue 4,   Pages 75-82

Abstract: construction in China, some key issues were discussed involved in the determination of site specific design groundmotion for nuclear power plants, including the seismic hazard analysis methods, the ground motion attenuationrelations, and the methods of determining design ground motion parameter.The countermeasure change was analyzed to consider the uncertainty of ground motion attenuation relationand the ground motion attenuation relation of diffuse earthquake; the differences were discussed between

Keywords： nuclear power plant     design ground motion     deterministic method     probabilistic method     ground motion    

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Title Author Date Type Operation

Application of coupled XFEM-BCQO in the structural optimization of a circular tunnel lining subjected to a ground

Nazim Abdul NARIMAN, Ayad Mohammad RAMADAN, Ilham Ibrahim MOHAMMAD

Journal Article

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

Journal Article

R&D of the ground-coupled heat pump technology in China

Nairen DIAO, Ping CUI, Junhong LIU, Zhaohong FANG,

Journal Article

INTERACTIONS BETWEEN ABOVE AND BELOW GROUND PLANT STRUCTURES: MECHANISMS AND ECOSYSTEM SERVICES

Journal Article

Shanghai center project excavation induced ground surface movements and deformations

Guolin XU, Jiwen ZHANG, Huang LIU, Changqin REN

Journal Article

Seismic ground motion analysis of Shanghai Pudong Airport site considering the effects of spatial correlation

JIANG Tong, CHEN Laiyun, XING Hailing, L? Xilin

Journal Article

Pondering over the scientific thinking of earthquake prediction from the miss report of Wenchuan Earthquake—re-discussing Li Siguang’s earthquake prediction thought

Zhao Wenjin

Journal Article

Evaluation of the performance of a centralized ground-water heat pump system in cold climate region

Shilei LU,Zhe CAI,Li ZHANG,Yiran LI

Journal Article

Optimisation for interconnected energy hub system with combined ground source heat pump and borehole

Da HUO, Wei WEI, Simon Le BLOND

Journal Article

Numerical study on the seismic response of the underground subway station- surrounding soil mass-ground

Guobo WANG, Mingzhi YUAN, Xianfeng MA, Jun WU

Journal Article

GENOME EDITING: A GROUND BREAKING RESEARCH HAS BEEN RANKED TOP 10 ENGINEERING FRONTS FROM 2017 TO 2021

Journal Article

Lateral displacement of soft ground under vacuum pressure and surcharge load

Chin-Yee ONG, Jin-Chun CHAI

Journal Article

EFFECTS OF TRANSPORT STRESS ON THE INTESTINES INVOLVING NEURONAL NITRIC OXIDE SYNTHASE

Journal Article

Ground-to-Air Radar Jamming Syste——Functions in Current Local Conflict and Its Development Trend

Zhang Xixiang

Journal Article

The issues related to determination of site specific design ground motion for nuclear power plants in

Li Xiaojun,He Qiumei,Hou Chunlin

Journal Article