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Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 145-160 doi: 10.1007/s11709-022-0806-4

Abstract: slabs in a concrete-face rockfill dam (CFRD) for the first time.It was found that the FRCC layer improved the flexural performance of concrete slabs significantly.The cracking and ultimate loads of a concrete slab with an 80 mm FRCC layer were 132% and 69% higherthan those of the unstrengthened concrete slab, respectively.144% higher than that of the unstrengthened concrete slab.

Keywords： strain-hardening cementitious composites     engineered cementitious composites     sprayable     shotcrete     strengthening     concrete-face    

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Dynamic in-plane transversal normal stresses in the concrete face of CFRD

Neftalí SARMIENTO-SOLANO, Miguel P. ROMO

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 135-148 doi: 10.1007/s11709-018-0481-7

Abstract: Severe earthquakes can induce damages to Concrete Face Rockfill Dams (CFRDs) such as concrete crackingdynamic complement of a method recently developed to evaluate in-plane transversal normal stresses in the concreteface of CFRD’s due to dam reservoir filling [ ].Using these two procedures in a sequential manner, it is possible to define the concrete slab in-planeIn the above reference, the method to evaluate the concrete face in-plane transversal normal stresses

Keywords： CFR dams     dynamic analysis     in-plane normal stresses     concrete face    

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In-plane transversal normal stresses in the concrete face of CFRD induced by the first-dam reservoir

Neftalí SARMIENTO-SOLANO, Miguel P. ROMO

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 1,   Pages 81-91 doi: 10.1007/s11709-016-0378-2

Abstract: To evaluate the effects of dam height, valley narrowness and width of concrete slabs on the first-damreservoir filling in-plane transversal normal stresses in the concrete face of CFRD´s, 3D finite differenceThe 3D analyses results show that high in-plane transversal compressive stresses develop within the concretepanels located in the central concrete face zone upon dam reservoir filling loading.face is advanced and through comparisons with the results of a 3D case numerical study, its accuracy

Keywords： concrete face     CFR dams     reservoir filling     slab in-plane stresses    

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New concept of design for high concrete face rockfill dams

Li Nenghui

Strategic Study of CAE 2011, Volume 13, Issue 3,   Pages 12-18

Abstract:

Based on analysis of experimential design for concrete face rockfilldams and its imperfection, a new design concept of high concrete face rockfill dams which includes stability

Keywords： concrete face rockfill dam     design concept     stability safety     seepage safety     deformation safety    

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300 m grade concrete faced rockfill dam adaptability and countermeasures

Ma Hongqi

Strategic Study of CAE 2011, Volume 13, Issue 12,   Pages 4-8

Abstract:

This paper summed up the main experiences and lessons of 200 m grade rockfill dam construction,analyzed 4 typical projects of 300 m grade dam, put forward the scientific research and key technical problems of 300 m grade dam.

Keywords： concrete face rockfill dam     adaptability     countermeasure research    

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China's High Dams Construction and Research on Science and Technology

Chen Zongliang

Strategic Study of CAE 2000, Volume 2, Issue 12,   Pages 84-89

Abstract: They in elude the 181 m-high concrete gravity dam in the Three Gorges Project, the 240 m — highErtan double curvature concrete arch dam, the 178 m- high Tianshenqiao No. 1 CFRD, the 182 m- high Hongjiadu

Keywords： hydroelectric power     high dam     gravity dam     arch dam     roller compacted concrete dam (RC-CD)     concrete face    

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Features of seismic hazard in large dam projects and strong motion monitoring of large dams

Martin WIELAND,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1,   Pages 56-64 doi: 10.1007/s11709-010-0005-6

Abstract: Among these dams were the 132-m-high Shapai RCC arch dam and the 156-m-high Zipingpu concrete face rockfill

Keywords： seismic hazard     arch dam     concrete face rockfill dam     strong motion instrumentation     reservoir-triggered    

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Effect of cutterhead configuration on tunnel face stability during shield machine maintenance outages

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 522-532 doi: 10.1007/s11709-023-0930-9

Abstract: Engineering safety during maintenance outages is determined by the stability of the tunnel face.The tunnel face is supported by a medium at the bottom of the excavation chamber and compressed air atOwing to the high risk of face failure, the necessity of support pressure when cutterhead support isDisregarding the supporting effect of the cutterhead will result in a tunnel face with underestimated

Keywords： tunnel face stability     cutterhead configuration     aperture ratio     pressure gradient     support ratio    

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Method for solving the nonlinear inverse problem in gas face seal diagnosis based on surrogate models

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0689-z

Abstract: However, they have not been introduced into gas face seal diagnosis tasks because of the unacceptablepresented work provides a quantitative, explainable, and feasible approach for identifying the cause of gas faceIt is also applicable to mechanical devices that face similar difficulties.

Keywords： surrogate model     gas face seal     fault diagnosis     nonlinear dynamics     tribology    

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Development and Application of Full-face Variable Diameter Slipforms of Inclined Shafts

Zhou Yu,Qian Xingxi,Fan Qixiang,Liao Jianxin

Strategic Study of CAE 2002, Volume 4, Issue 9,   Pages 81-85

Abstract:

The construction, principle and main technical performance of the full-face variable diameter slipformsSome new techniques of the full-face variable diameter slipforms are taken in concrete construction.

Keywords： Three Gorges Project (TGP)     inclined shafts concrete construction     full-face variable diameter slipforms    

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Local uncorrelated local discriminant embedding for face recognition

Xiao-hu MA,Meng YANG,Zhao ZHANG

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 3,   Pages 212-223 doi: 10.1631/FITEE.1500255

Abstract: The feature extraction algorithm plays an important role in face recognition.

Keywords： Feature extraction     Local discriminant embedding     Local uncorrelated criterion     Face recognition    

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Model test and discrete element method simulation of shield tunneling face stability in transparent clay

Huayang LEI, Yajie ZHANG, Yao HU, Yingnan LIU

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 147-166 doi: 10.1007/s11709-020-0704-6

Abstract: The stability of the shield tunneling face is an extremely important factor affecting the safety of tunnelThe stability of the shield tunneling face (failure mode, influence range, support force, and surfaceto investigate the active failure mode, influence range, and support force of the shield tunneling facethree-dimensional numerical simulations are conducted to verify the failure mode of the shield tunneling face

Keywords： shield tunneling face     stability     transparent clay     model test     numerical simulation    

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Investigation of Generalized SIFs of cracks in 3D piezoelectric media under various crack-face conditions

Jaroon RUNGAMORNRAT, Bounsana CHANSAVANG, Weeraporn PHONGTINNABOOT, Chung Nguyen VAN

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 280-298 doi: 10.1007/s11709-019-0586-7

Abstract: This paper investigates the influence of crack geometry, crack-face and loading conditions, and the permittivitymode-I stress intensity factors ( ) for two representative non-planar cracks under different crack-face

Keywords： crack-face conditions     intensity factors     non-flat cracks     permittivity     piezoelectric media     SGBEM    

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Face recognition based on subset selection via metric learning on manifold

Hong SHAO,Shuang CHEN,Jie-yi ZHAO,Wen-cheng CUI,Tian-shu YU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 12,   Pages 1046-1058 doi: 10.1631/FITEE.1500085

Abstract: With the development of face recognition using sparse representation based classification (SRC), manyelements correctly by taking into account the interclass/intraclass relationship and manifold structure of face

Keywords： Face recognition     Sparse representation     Manifold structure     Metric learning     Subset selection    

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Experimental study of surface integrity and fatigue life in the face milling of Inconel 718

Xiangyu WANG, Chuanzhen HUANG, Bin ZOU, Guoliang LIU, Hongtao ZHU, Jun WANG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2,   Pages 243-250 doi: 10.1007/s11465-018-0479-9

Abstract:

The Inconel 718 alloy is widely used in the aerospace and power industries. The machining-induced surface integrity and fatigue life of this material are important factors for consideration due to high reliability and safety requirements. In this work, the milling of Inconel 718 was conducted at different cutting speeds and feed rates. Surface integrity and fatigue life were measured directly. The effects of cutting speed and feed rate on surface integrity and their further influences on fatigue life were analyzed. Within the chosen parameter range, the cutting speed barely affected the surface roughness, whereas the feed rate increased the surface roughness through the ideal residual height. The surface hardness increased as the cutting speed and feed rate increased. Tensile residual stress was observed on the machined surface, which showed improvement with the increasing feed rate. The cutting speed was not an influencing factor on fatigue life, but the feed rate affected fatigue life through the surface roughness. The high surface roughness resulting from the high feed rate could result in a high stress concentration factor and lead to a low fatigue life.

Keywords： roughness     hardness     residual stress     microstructure     fatigue life    

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Title Author Date Type Operation

Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious

Journal Article

Dynamic in-plane transversal normal stresses in the concrete face of CFRD

Neftalí SARMIENTO-SOLANO, Miguel P. ROMO

Journal Article

In-plane transversal normal stresses in the concrete face of CFRD induced by the first-dam reservoir

Neftalí SARMIENTO-SOLANO, Miguel P. ROMO

Journal Article

New concept of design for high concrete face rockfill dams

Li Nenghui

Journal Article

300 m grade concrete faced rockfill dam adaptability and countermeasures

Ma Hongqi

Journal Article

China's High Dams Construction and Research on Science and Technology

Chen Zongliang

Journal Article

Features of seismic hazard in large dam projects and strong motion monitoring of large dams

Martin WIELAND,

Journal Article

Effect of cutterhead configuration on tunnel face stability during shield machine maintenance outages

Journal Article

Method for solving the nonlinear inverse problem in gas face seal diagnosis based on surrogate models

Journal Article

Development and Application of Full-face Variable Diameter Slipforms of Inclined Shafts

Zhou Yu,Qian Xingxi,Fan Qixiang,Liao Jianxin

Journal Article

Local uncorrelated local discriminant embedding for face recognition

Xiao-hu MA,Meng YANG,Zhao ZHANG

Journal Article

Model test and discrete element method simulation of shield tunneling face stability in transparent clay

Huayang LEI, Yajie ZHANG, Yao HU, Yingnan LIU

Journal Article

Investigation of Generalized SIFs of cracks in 3D piezoelectric media under various crack-face conditions

Jaroon RUNGAMORNRAT, Bounsana CHANSAVANG, Weeraporn PHONGTINNABOOT, Chung Nguyen VAN

Journal Article

Face recognition based on subset selection via metric learning on manifold

Hong SHAO,Shuang CHEN,Jie-yi ZHAO,Wen-cheng CUI,Tian-shu YU

Journal Article

Experimental study of surface integrity and fatigue life in the face milling of Inconel 718

Xiangyu WANG, Chuanzhen HUANG, Bin ZOU, Guoliang LIU, Hongtao ZHU, Jun WANG

Journal Article