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Analysis on damage causes of built-in corridor in core rock-fill dam on thick overburden: A case study

Jia’ao YU; Zhenzhong SHEN; Zhangxin HUANG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 6,   Pages 762-780 doi: 10.1007/s11709-022-0847-8

Abstract: The stress state of the built-in corridor in core rock-fill dam on thick overburden is extremely complexThe purpose of this paper was to investigate the effect of thick overburden on the stress and deformationResults demonstrate that the damage causes of the corridor are the deformability difference between the overburden

Keywords: thick overburden     built-in corridor     stress     deformation     causes for damage     concrete damaged plasticity    

Three-dimensional seismic response analysis of a concrete-faced rockfill dam on overburden layers

Dakuo FENG, Ga ZHANG, Jianmin ZHANG,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 2,   Pages 258-266 doi: 10.1007/s11709-010-0031-4

Abstract: ensuring its seismic safety during operation, especially of a concrete-faced rockfill dam (CFRD) on overburdenearthquake significantly aggravates the deformation of peripheral joints; 4) the impounding condition and overburden

Keywords: concrete-faced rockfill dam (CFRD)     overburden layer     dynamic analysis     finite element method (FEM)    

Demonstration project of safe and efficient mining operations in extra-thick coal seam

Jinhui WANG

Frontiers of Engineering Management 2017, Volume 4, Issue 1,   Pages 110-110 doi: 10.15302/J-FEM-2016063

Abstract:

Unified solution of limit loads of thick wall cylinder subject to external pressure considering strain

CHEN Changfu, XIAO Shujun, YANG Yu

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 329-333 doi: 10.1007/s11709-007-0043-x

Abstract: softening materials, such as concrete or rock, was derived, and the elastic and plastic limit loads of a thick-walled

Elastic analysis of heterogeneous thick-walled spherical pressure vessels with parabolic varying properties

Keyhan KARAMI, Majid ABEDI, Mohammad ZAMANI NEJAD, Mohammad Hassan LOTFIAN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4,   Pages 433-438 doi: 10.1007/s11465-012-0336-1

Abstract:

On the basis of plane elasticity theory (PET), the displacement and stress components in a thick-walled

Keywords: thick-walled spherical vessels     heterogeneous materials     FGM     FEM     parabolic varying properties    

A Laboratorial Method for Determining Incipient Yield Pressure of Thick Wall Cylinder

Zhang Yuxian’,Liao Zhenfang,Wang Hong ,Pei Jianghong

Strategic Study of CAE 2005, Volume 7, Issue 11,   Pages 72-75

Abstract:

Based on the relation between the incipient yield pressure and the limit of yielding in cylinder according to the elastic disabled rule, a laboratorial method of determining the incipient yield pressure is designed and a set of experimental data were gained. The incipient yield pressure of the cylinder is gained by analyzing the experimental data. The laboratorial method has a good reliability as the experimental value has a little error to the theory value.

Keywords: thick wall cylinder     disabled     incipient yield pressure    

High-Efficiency Circularly Polarized Phased Array Based on 5 μm-Thick Nematic Liquid Crystals: Design

Xin Yu Wu,Fengshuo Wan,Hongyuan Feng,Shichao Jin,Chong Guo,Yu Wei,Dunge Liu,Yuqian Yang,Longzhu Cai,Zhi Hao Jiang,Wei Hong,

Engineering doi: 10.1016/j.eng.2023.08.013

Abstract: This paper presents a systematic investigation and demonstration of a K-band circularly polarized liquid-crystal-based phased array (LCPA), including the design, over-the-air (OTA) in-array calibration, and experimental validation. The LCPA contains 16 phase-shifting radiating channels, each consisting of a circularly polarized stacked patch antenna and a liquid-crystal-based phase shifter (LCPS) based on a loaded differential line structure. Thanks to its slow-wave properties, the LCPS exhibits a maximum phase-shifting range of more than 360° with a figure of merit of 78.3°·dB−1 based on a liquid crystal layer with a thickness of only 5 μm. Furthermore, an automatic OTA calibration based on a state ergodic method is proposed, which enables the extraction of the phase-voltage curve of every individual LCPA channel. The proposed LCPA is manufactured and characterized with a total profile of only 1.76 mm, experimentally demonstrating a scanned circularly polarized beam from −40° to +40° with a measured peak gain of 12.5 dBic and a scanning loss of less than 2.5 dB. The bandwidth of the LCPA, which satisfies the requirements of port reflection (|S11|) < −15 dB, an axial ratio (AR) < 3 dB, beam squinting < 3°, and a gain variation < 2.2 dB, spans from 25.5 to 26.0 GHz. The total efficiency is about 34%, which represents a new state of the art. The use of the demonstrated low-profile LCPA to support circularly polarized scanning beams, along with the systematic design and calibration methodology, holds potential promise for a variety of millimeter-wave applications.

Keywords: Circularly polarized     Liquid crystal     Liquid crystal-based phased array (LCPA)     Phase shifter     Over-the-air (OTA) calibration    

The Experimental Research on Affecting Factors on Bearing Capacity of Steel Fiber Reinforced Concrete Thick

Sun Chengfang,Gu Qian,Chen Xizi,Peng Shaomin

Strategic Study of CAE 2003, Volume 5, Issue 6,   Pages 79-83

Abstract: on thirty specimens of steel reinforced concrete and steel fiber reinforced concrete (SFRC) two-pile thicktension bearing steel bar, the main factors which affect the ultimate bearing capacity of SFRC two-pile thick

Keywords: steel fiber     fiber reinforced concrete     pile thick cap     bearing capacity     affecting factors    

Effects of previous drying of sediment on root functional traits and rhizoperformance of emerged macrophytes

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1427-1

Abstract:

• Sediment desiccation alters morphological characteristics of aquatic sediment.

Keywords: Fibrous-root macrophytes     Thick-root macrophytes     Nutrients removal     Wet sediment     Dried-rewetted sediment    

Analysis of Plates and Shells and Its Application

Liu Renhuai

Strategic Study of CAE 2000, Volume 2, Issue 11,   Pages 60-67

Abstract: left to be solved in the fields on nonlinear theory of thin plates and shells, and linear theory of thickThe paper also gives an introduction of the author's work on the linear bending of both thick and

Keywords: thin plates and shells     thick plates and shells     nonlinear problem     linear problem     bending     stability     vibration    

Stress observation of shaft lining wall during construction and initial operation

Wen Dehua

Strategic Study of CAE 2012, Volume 14, Issue 2,   Pages 80-84

Abstract:

For searching the stress and deformation law of blended shaft-lining during construction and initial operation, sensors were buried in interior and exterior wall of shaft-lining, and automated monitoring system was created. The stress and deformation law was obtained by analyzing the test results. With the law, we can forecast the long-term safety of shaft lining and provide scientific decision evidence for preventive and treating measures of broken wall.

Keywords: shaft lining monitoring     thick topsoil     strain     additional force    

Full-mechanized caving mining technology of extremely thick and hard coal-seam with hard roof in shallow

Zhang Zhongwen,Wu Jinan

Strategic Study of CAE 2011, Volume 13, Issue 11,   Pages 107-112

Abstract:

Top-coal caving difficulty degree and rational mining method were analyzed by theoretical method on the basis of the 4th coal-seam condition of Pingshuo Mining area. For improving top-coal caving degree, the parameters of full-mechanized caving mining face were obtained by numerical simulation and the equipments were selected and assorted. Practice showed that safe and high-efficient mining with high recovery ratio would be realized by lengthening mining face and adding mining height in shallow buried hard coal-seam with hard roof.

Keywords: shallow buried depth     hard coal-seam with hard roof     top-coal caving difficulty degree     full-mechanized caving mining with large mining-height    

Three Dimensional Finite Element Analysis of Cracks for Deep Mixing Wall

Gao Wenhua,Wang Xiangqiu,Chen Qiunan,Zhang Zhimin

Strategic Study of CAE 2005, Volume 7, Issue 12,   Pages 88-91

Abstract: According to Mindlin plate theory, the thick plate model and three dimensional finite element model of

Keywords: cracks     deep mixing wall     thick plate     equivalent bending moment     three dimensional finite element    

Title Author Date Type Operation

Analysis on damage causes of built-in corridor in core rock-fill dam on thick overburden: A case study

Jia’ao YU; Zhenzhong SHEN; Zhangxin HUANG

Journal Article

Three-dimensional seismic response analysis of a concrete-faced rockfill dam on overburden layers

Dakuo FENG, Ga ZHANG, Jianmin ZHANG,

Journal Article

Demonstration project of safe and efficient mining operations in extra-thick coal seam

Jinhui WANG

Journal Article

Unified solution of limit loads of thick wall cylinder subject to external pressure considering strain

CHEN Changfu, XIAO Shujun, YANG Yu

Journal Article

Elastic analysis of heterogeneous thick-walled spherical pressure vessels with parabolic varying properties

Keyhan KARAMI, Majid ABEDI, Mohammad ZAMANI NEJAD, Mohammad Hassan LOTFIAN

Journal Article

A Laboratorial Method for Determining Incipient Yield Pressure of Thick Wall Cylinder

Zhang Yuxian’,Liao Zhenfang,Wang Hong ,Pei Jianghong

Journal Article

High-Efficiency Circularly Polarized Phased Array Based on 5 μm-Thick Nematic Liquid Crystals: Design

Xin Yu Wu,Fengshuo Wan,Hongyuan Feng,Shichao Jin,Chong Guo,Yu Wei,Dunge Liu,Yuqian Yang,Longzhu Cai,Zhi Hao Jiang,Wei Hong,

Journal Article

The Experimental Research on Affecting Factors on Bearing Capacity of Steel Fiber Reinforced Concrete Thick

Sun Chengfang,Gu Qian,Chen Xizi,Peng Shaomin

Journal Article

Effects of previous drying of sediment on root functional traits and rhizoperformance of emerged macrophytes

Journal Article

Analysis of Plates and Shells and Its Application

Liu Renhuai

Journal Article

Stress observation of shaft lining wall during construction and initial operation

Wen Dehua

Journal Article

Full-mechanized caving mining technology of extremely thick and hard coal-seam with hard roof in shallow

Zhang Zhongwen,Wu Jinan

Journal Article

Three Dimensional Finite Element Analysis of Cracks for Deep Mixing Wall

Gao Wenhua,Wang Xiangqiu,Chen Qiunan,Zhang Zhimin

Journal Article