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Crack detection for wading-concrete structures using water irrigation and electric heating

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 368-377 doi: 10.1007/s11709-022-0926-x

Abstract: Cracking in wading-concrete structures has a worse impact on structural safety compared with conventionalconcrete structures.accurate and timely monitoring of crack development plays a significant role in the safety of wading-concreteBased on this, a novel crack-identification method for underwater concrete structures is presented.A series of tests was conducted on a reinforced-concrete beam using this system.

Keywords： structural health monitoring     underwater concrete structure     fiber Bragg grating     crack detection     temperature    

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Performance of steel bridge deck pavement structure with ultra high performance concrete based on resin

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 895-904 doi: 10.1007/s11709-021-0759-z

Abstract: investigated a pavement system on steel bridge decks that use epoxy resin (EP) bonded ultra-high performance concreteThrough FEM analysis and static and dynamic bending fatigue tests of the composite structure, the influencesThe results show that the resin bonded UHPC pavement structure can reduce the weld strain in the steelabout 50%; the bending resistance of reinforced UHPC structures is twice that of unreinforced UHPC structure, and the dynamic deflection of the UHPC pavement structure increases exponentially with increasing fatigue

Keywords： steel bridge deck pavement     ultra-high-performance concrete     epoxy resin     composite structure     bending    

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Layout optimization of steel reinforcement in concrete structure using a truss-continuum model

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 669-685 doi: 10.1007/s11709-023-0963-0

Abstract: Owing to advancement in advanced manufacturing technology, the reinforcement design of concrete structuresa new approach is developed in this study to optimize the reinforcement layout in steel-reinforced concreteTo fully utilize the tensile strength of steel and the compressive strength of concrete, the optimizationsensitivity of steel in a concrete–steel composite is integrated with the average normal stress of aneighboring concrete.

Keywords： bi-directional evolutionary structural optimization     steel-reinforced concrete     concrete stress     reinforcement    

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Prototype test study on mechanical characteristics of segmental lining structure of underwater railway

He Chuan,Feng Kun,Yan Qixiang,Qi Chun

Strategic Study of CAE 2012, Volume 14, Issue 10,   Pages 65-72

Abstract:

In view of the first underwater railway shield tunnel, Guangzhou ZhujiangRiver Shiziyang shield tunnel, the prototype test is carried out against its segmental lining structureby using “Multi function Shield Tunnel Structure Test System”.The results show that the mechanical characteristics of segmental lining structure vary from differentstaggered assembling structure.

Keywords： underwater railway shield tunnel     segmental lining structure     prototype test     tenon joint     failure characteristics    

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Seismic performance of prestressed concrete stand structure supporting retractable steel roof

Yiyi CHEN, Dazhao ZHANG, Weichen XUE, Wensheng LU

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 117-124 doi: 10.1007/s11709-009-0024-3

Abstract: The seismic behavior of a structural system composed of pre-stressed concrete stand supporting a retractableroof status has great effect on the natural period, vibration modes, and seismic response of the whole structure

Keywords： retractable steel roof     prestressed concrete     seismic performance     failure mode     inelastic response     shaking    

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Nonlinear elastic model for compacted clay concrete interface

R. R. SHAKIR, Jungao ZHU

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 187-194 doi: 10.1007/s11709-009-0033-2

Abstract: In this paper, a nonlinear elastic model was developed to simulate the behavior of compacted clay concrete

Keywords： interface modeling     friction     soil structure interface     soil structure interaction     simple shear test    

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Automated classification of civil structure defects based on convolutional neural network

Pierclaudio SAVINO, Francesco TONDOLO

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 305-317 doi: 10.1007/s11709-021-0725-9

Abstract: To overcome this challenge, this paper presents a method for automating concrete damage classificationusing a database built with 1352 images balanced between “undamaged”, “cracked”, and “delaminated” concretethe highest validation accuracy of approximately 94%, was selected as the most suitable network for concreteThe results confirm that the proposed model can correctly classify images from real concrete surfaces

Keywords： concrete structure     infrastructures     visual inspection     convolutional neural network     artificial intelligence    

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Turbidity-adaptive underwater image enhancement method using image fusion

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-021-0669-8

Abstract: Clear, correct imaging is a prerequisite for underwater operations.Most of the existing underwater imaging methods focus on relatively clear underwater environment, itIn this paper, we propose a turbidity-adaptive underwater image enhancement method.The proposed method is verified by an underwater image dataset captured in real underwater environmentThe result is evaluated by image metrics including structure similarity index measure, underwater color

Keywords： turbidity     underwater image enhancement     image fusion     underwater robots     visibility    

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Progressive collapse of 2D reinforced concrete structures under sudden column removal

El Houcine MOURID, Said MAMOURI, Adnan IBRAHIMBEGOVIC

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1387-1402 doi: 10.1007/s11709-020-0645-0

Abstract: paper, an efficient strategy to model and simulate the progressive collapse of multi-story reinforced concretestructure under sudden column removal is presented.The effect of gravity loads, structure-ground contact, and structure-structure contact are accountedMoreover, this contribution pertains to a very thorough investigation of progressive collapse of the structure

Keywords： failure mechanism     MBS dynamic analysis     gravity loads     structure-ground contact     structure-structure contact    

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Development of new systems of reinforced concrete　spatial grid structure in China

Ma Kejian,Zhang Huagang,Xiao Jianchun,Lu Yaqin

Strategic Study of CAE 2008, Volume 10, Issue 8,   Pages 22-34

Abstract:

Reinforced concrete spatial grid structure includes planar open-web gridstructure, open-web sandwich plate structure, open-web dual grid structure, cast-in-place concrete roundIn recent years, we have developed the reinforced concrete open-web sandwich shell and arch structurethrough bending the reinforced concrete open-web sandwich plate structure by one direction,and the reinforcedconcrete open-web sandwich hyperbolic flat shell structure through bending the reinforced concrete open-web

Keywords： reinforced concrete     open-web sandwich plate     cast-in-place concrete round eye hollow plate     grid structure     shell structure    

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Research on recycled concrete and its utilization in building structures in China

Jianzhuang XIAO, Tao DING

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 3,   Pages 215-226 doi: 10.1007/s11709-013-0212-z

Abstract: introduction to current shaking table test research in China on structures built with recycled aggregate concrete

Keywords： recycled aggregate concrete (RAC)     structural material     shaking table tests     building structure    

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Behavior of compacted clay-concrete interface

R. R .SHAKIR, Jungao ZHU

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1,   Pages 85-92 doi: 10.1007/s11709-009-0013-6

Abstract: Tests of interface between compacted clay and concrete were conducted systematically using interfaceTwo types of concrete with different surface roughness, i.e., relatively smooth and relatively roughcontent, normal stress and rough surface on the shear stress-shear displacement relationship of clay-concretesurface except when the clay water content is greater than 16% for the case of rough concrete surfaceshear strength increases with increasing water content ratio especially for the case of clay-rough concrete

Keywords： soil structure interaction     simple shear test     interface     friction     compacted clay     interface modeling    

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Effect of concrete creep and shrinkage on tall hybrid-structures and its countermeasures

Pusheng SHEN, Hui FANG, Xinhong XIA

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 234-239 doi: 10.1007/s11709-009-0020-7

Abstract: Based on the concrete creep and shrinkage calculation formula in American Concrete Institute (ACI) code

Keywords： creep     shrinkage     construction process     hybrid-structure    

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Development of combined transitional pavement structure for urban tram track-road grade crossings

Frontiers of Structural and Civil Engineering   Pages 1199-1210 doi: 10.1007/s11709-023-0949-y

Abstract: Therefore, in this study, a novel pavement structure between tram tracks and roads constructed usingpolyurethane (PU) elastic concrete and ultra-high-performance concrete (UHPC), referred to as a track-roadFirst, the mechanical properties of the PU elastic concrete are evaluated.The performance of the proposed structure is investigated using a three-dimensional finite element modelAdditionally, the PU elastic concrete achieved sufficient performance.

Keywords： urban tram track     grade crossing     combined track-road transitional pavement     polyurethane elastic concrete    

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Damage assessment and diagnosis of hydraulic concrete structures using optimization-based machine learning

Frontiers of Structural and Civil Engineering   Pages 1281-1294 doi: 10.1007/s11709-023-0975-9

Abstract: Concrete is widely used in various large construction projects owing to its high durability, compressiveHowever, the tensile strength of concrete is low, and concrete cracks easily.Changes in the concrete structure will result in changes in parameters such as the frequency mode andSubsequently, various indices for the damage diagnosis of concrete structures based on the curvatureThe proposed damage assessment method for dam concrete structures comprises various modal parameters,

Keywords： hydraulic structure     curvature mode     damage detection     artifical neural network     artificial bee colony    

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Title Author Date Type Operation

Crack detection for wading-concrete structures using water irrigation and electric heating

Journal Article

Performance of steel bridge deck pavement structure with ultra high performance concrete based on resin

Journal Article

Layout optimization of steel reinforcement in concrete structure using a truss-continuum model

Journal Article

Prototype test study on mechanical characteristics of segmental lining structure of underwater railway

He Chuan,Feng Kun,Yan Qixiang,Qi Chun

Journal Article

Seismic performance of prestressed concrete stand structure supporting retractable steel roof

Yiyi CHEN, Dazhao ZHANG, Weichen XUE, Wensheng LU

Journal Article

Nonlinear elastic model for compacted clay concrete interface

R. R. SHAKIR, Jungao ZHU

Journal Article

Automated classification of civil structure defects based on convolutional neural network

Pierclaudio SAVINO, Francesco TONDOLO

Journal Article

Turbidity-adaptive underwater image enhancement method using image fusion

Journal Article

Progressive collapse of 2D reinforced concrete structures under sudden column removal

El Houcine MOURID, Said MAMOURI, Adnan IBRAHIMBEGOVIC

Journal Article

Development of new systems of reinforced concrete　spatial grid structure in China

Ma Kejian,Zhang Huagang,Xiao Jianchun,Lu Yaqin

Journal Article

Research on recycled concrete and its utilization in building structures in China

Jianzhuang XIAO, Tao DING

Journal Article

Behavior of compacted clay-concrete interface

R. R .SHAKIR, Jungao ZHU

Journal Article

Effect of concrete creep and shrinkage on tall hybrid-structures and its countermeasures

Pusheng SHEN, Hui FANG, Xinhong XIA

Journal Article

Development of combined transitional pavement structure for urban tram track-road grade crossings

Journal Article

Damage assessment and diagnosis of hydraulic concrete structures using optimization-based machine learning

Journal Article