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Damage identification in connections of moment frames using time domain responses and an optimization method

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 851-866 doi: 10.1007/s11709-021-0739-3

Abstract: The beam-to-column connection in a metallic moment frame structure is modeled by a zero-length rotationalspring at both ends of the beam element.For each connection, an end-fixity factor is specified, which changes between 0 and 1.

Keywords： damage identification     beam-to-column connection     time-domain response     optimization    

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Modeling of semi-rigid beam-to-column steel joints under extreme loading

C FANG, B A IZZUDDIN, A Y ELGHAZOULI, D A NETHERCOT

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 3,   Pages 245-263 doi: 10.1007/s11709-013-0215-9

Abstract: This paper presents a component approach for modeling semi-rigid beam-to-column joints based on Eurocode3

Keywords： semi-rigid joint     component method     ductility     elevated temperature    

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Effect of eccentricity in reinforced concrete beam-column-slab connection under cyclic loading

Rooh ULLAH, Amjad NASEER, Muhammad FAHIM, Mohammad ASHRAF, Eid BADSHAH

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 390-398 doi: 10.1007/s11709-021-0690-3

Abstract: Beam–column connections are one of the most critical elements of reinforced concrete structures, especiallyThis study presents the experimental results of two half-scale eccentric beam-column-slab connectionsThe horizontal eccentricity ( ) is maintained at 12.5% and 25% of column width ( ) for specimens 1 andThe damage pattern, performance levels, displacement ductility ( ), energy dissipation, and connection

Keywords： corner connection     eccentricity     strength degradation     stiffness degradation     energy dissipation     performance    

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Experimental analysis on strength and failure modes of wood beam-column connections

Zhenhua HUANG,Sheldon Q SHI,Liping CAI

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 3,   Pages 260-269 doi: 10.1007/s11709-014-0261-y

Abstract: experimentally examined the strength, failure modes, and behaviors of dowel-bearing and fiber-bearing wood beam-column(dowel-bearing type wood beam-column connection with fiber-bearing surfaces) showed good behavior (largepeak moment) under the monotonic loads, and the tenon joint connection (fiber-bearing wood beam-columnThe cyclic property of loading reduced the strength of the dowel-bearing type wood beam-column connections, but increased the strength of fiber-bearing type wood beam-column connections.

Keywords： wood     connection     dowel-bearing     fiber-bearing    

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Experimental study on slender buckling-restrained knee braces with round steel bar cores

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 99-121 doi: 10.1007/s11709-022-0875-4

Abstract: This study aimed to investigate a novel slender buckling-restrained knee brace damper (BRKB) for welded and weld-free steel framing systems. The proposed BRKB adopts steel bar cores connected by a central coupler and restrained by tube buckling restrainers with a cover tube supporter. The advantages of the proposed damper include easy assembly compared to conventional buckling restrained braces, and high architectural flexibility for the retrofitting of large-span weld-free or welded steel moment-resisting systems. Specifically, by increasing the number of contraction allowances, undesirable failure mechanisms that are global instability and local buckling of the restrainer ends can be effectively suppressed because the more uniform plastic deformation of the core bar can be achieved longitudinally. In this study, displacement-controlled compression and cyclic loading tests were carried out to investigate the deformation capacities of the proposed BRKBs. Structural performance metrics associated with both loading tests, such as strength capacities, strains at the cover tubes and buckling restrainers, and hysteretic behaviors of the proposed damper under cyclic loads, were measured and discussed. Test results revealed that the geometrical characteristics of the cover tubes and adopted contraction allowances at the dampers play essential roles in their load-bearing capacities.

Keywords： weld-free beam-to-column connections     moment-resisting frame     cyclic and compression loading tests     buckling-restrained    

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An innovative model for predicting the displacement and rotation of column-tree moment connection under

Mohammad Ali NAGHSH, Aydin SHISHEGARAN, Behnam KARAMI, Timon RABCZUK, Arshia SHISHEGARAN, Hamed TAGHAVIZADEH, Mehdi MORADI

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 194-212 doi: 10.1007/s11709-020-0688-2

Abstract: In this study, we carried out nonlinear finite element simulations to predict the performance of a column-treemoment connection (CTMC) under fire and static loads.variables, including the applied temperature, number of flange bolts, number of web bolts, length of the beamIn addition, the fire resistance increases with a decrease in the beam length; thus, a shorter beam can

Keywords： column-tree moment connection     Finite element model     parametric study     fire     regression models     gene expression    

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Experimental and numerical analysis of beam to column joints in steel structures

Gholamreza ABDOLLAHZADEH, Seyed Mostafa SHABANIAN

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 642-661 doi: 10.1007/s11709-017-0457-z

Abstract: as formability under extreme loads such as earthquakes are the primary challenges in the modeling of beam-to-columnand neural network methods have been presented in order to model the complex hysteresis behavior of beam-to-columntraining of the neural network, the experiments were carried out on samples with real dimensions of beam-to-columnthat the combinational modeling is able to display the complex narrowed hysteresis behavior of the beam-to-columnThis model has also been successfully employed for the prediction of the behavior of a newly designed connection

Keywords： beam to column connections     experiments     component method     neural network model     combinational modeling    

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Investigation of the interior RC beam-column joints under monotonic antisymmetrical load

Fei GAO, Zhiqiang TANG, Biao HU, Junbo CHEN, Hongping ZHU, Jian MA

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1474-1494 doi: 10.1007/s11709-019-0572-0

Abstract: The paper presents numerical findings of reinforced concrete interior beam-column joints under monotonicshear force and thus to increase the shear capacity, prevent the outward buckling of steel bars in columnthe propagation of cracks, but also to increase the yield load, decrease the yield displacement of beam

Keywords： RC beam-column joint     reinforcement ratio in joint core     axial compression ratio     finite element     test    

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Cyclic behavior of stiffened joints between concrete-filled steel tubular column and steel beam with

Chunyan QUAN,Wei WANG,Jian ZHOU,Rong WANG

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 3,   Pages 333-344 doi: 10.1007/s11709-016-0357-7

Abstract: investigation on a stiffened joint in practical engineering which was between concrete-filled steel tubular columnand steel beam with narrow outer diaphragm and partial joint penetration welds.of the specimen which were influenced by the axial compression ratio of the concrete-filled tubular columnhysteresis damage fracture on the narrow outer diaphragm connected to the concrete-filled steel tubular column

Keywords： narrow outer diaphragm     concrete-filled tubular column     joint     inner and outer stiffening     cyclic behavior    

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Seismic behavior experimental study of frame joints with special-shaped column and dispersed steel barbeam

Shuchun LI, Bo DIAO, Youpo SU,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4,   Pages 378-383 doi: 10.1007/s11709-009-0064-8

Abstract: To overcome the problem that steel bars are put too close at a flame joint with special-shaped beam andcolumn, mechanical performance of three groups of six RC flame joints with special-shaped (L, T and+) column and dispersed-steel bars-beam on the top floor under cyclic loads were studied.Experimental comparison was conducted between special-shaped (L, T and+) column and normal beams.analysis indicate that the mechanical and seismic behaviors of frame joints with T-shaped and+-shaped column

Keywords： beam with dispersed steel bar     flame joints with special-shaped beam and column     seismic behavior     scale    

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Parametric study of hexagonal castellated beams in post-tensioned self-centering steel connections

Hassan ABEDI SARVESTANI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1020-1035 doi: 10.1007/s11709-019-0534-6

Abstract: The effects of important parameters (beam reinforcing plates, initial post-tensioning, and material propertiesThe PTSC connection is comprised of bolted top and bottom angles as energy dissipaters and steel strandsThe necessity of reinforcing plates to prevent beam flange from local buckling has been reaffirmed.

Keywords： finite element analysis     hexagonal castellated beam     parametric study     post-tensioned self-centering steelconnection     steel moment-resisting frame    

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Non linear modeling of three-dimensional reinforced and fiber concrete structures

Fatiha IGUETOULENE, Youcef BOUAFIA, Mohand Said KACHI

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 439-453 doi: 10.1007/s11709-017-0433-7

Abstract: Under the effect of the ascending loading, the behavior of reinforced concrete structures is rather non linear. Research in industry and science aims to extend forward the use of non-linear calculation of fiber concrete for structural parts such as columns, veils and pious, as the fiber concrete is more ductile behavior then the classical concrete behavior. The formulation of the element has been established for modeling the nonlinear behavior of elastic structures in three dimensions, based on the displacement method. For the behavior of concrete and fiber concrete compressive and tensile strength (stress-strain) the uniaxial formulation is used. For steel bi-linear relationship is used. The approach is based on the discretization of the cross section trapezoidal tables. Forming the stiffness matrix of the section, the integral of the surface is calculated as the sum of the integrals on each of the cutting trapezoids. To integrate on the trapeze we have adopted the type of Simpson integration scheme.

Keywords： numerical modeling     column and beam     nonlinear analysis     fibers     pious     reinforcement     3D formulation     response    

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Seismic retrofitting of severely damaged RC connections made with recycled concrete using CFRP sheets

Yasmin MURAD, Wassel AL BODOUR, Ahmed ASHTEYAT

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 554-568 doi: 10.1007/s11709-020-0613-8

Abstract: fuel ash or silica fume as cement partial replacement to enhance the strength and ultimate drift of beam-column

Keywords： retrofitting     CFRP sheets     recycled concrete     pulverised fuel ash     silica fume     cyclic     beam-column connections    

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Special Column on

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 4,   Pages 323-324 doi: 10.1007/s11709-014-0288-0

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Risk evaluation for the task transfer of an aircraft maintenance program based on a multielement connection

Frontiers of Engineering Management doi: 10.1007/s42524-023-0282-0

Abstract: A multielement connection number-based evaluative model is employed to characterize decision-specificMoreover, the paper conducts a temporal risk trend analysis founded on partial connection numbers of

Keywords： risk evaluation     maintenance steering group     analytic network process     task transfer     maintenance program    

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Title Author Date Type Operation

Damage identification in connections of moment frames using time domain responses and an optimization method

Journal Article

Modeling of semi-rigid beam-to-column steel joints under extreme loading

C FANG, B A IZZUDDIN, A Y ELGHAZOULI, D A NETHERCOT

Journal Article

Effect of eccentricity in reinforced concrete beam-column-slab connection under cyclic loading

Rooh ULLAH, Amjad NASEER, Muhammad FAHIM, Mohammad ASHRAF, Eid BADSHAH

Journal Article

Experimental analysis on strength and failure modes of wood beam-column connections

Zhenhua HUANG,Sheldon Q SHI,Liping CAI

Journal Article

Experimental study on slender buckling-restrained knee braces with round steel bar cores

Journal Article

An innovative model for predicting the displacement and rotation of column-tree moment connection under

Mohammad Ali NAGHSH, Aydin SHISHEGARAN, Behnam KARAMI, Timon RABCZUK, Arshia SHISHEGARAN, Hamed TAGHAVIZADEH, Mehdi MORADI

Journal Article

Experimental and numerical analysis of beam to column joints in steel structures

Gholamreza ABDOLLAHZADEH, Seyed Mostafa SHABANIAN

Journal Article

Investigation of the interior RC beam-column joints under monotonic antisymmetrical load

Fei GAO, Zhiqiang TANG, Biao HU, Junbo CHEN, Hongping ZHU, Jian MA

Journal Article

Cyclic behavior of stiffened joints between concrete-filled steel tubular column and steel beam with

Chunyan QUAN,Wei WANG,Jian ZHOU,Rong WANG

Journal Article

Seismic behavior experimental study of frame joints with special-shaped column and dispersed steel barbeam

Shuchun LI, Bo DIAO, Youpo SU,

Journal Article

Parametric study of hexagonal castellated beams in post-tensioned self-centering steel connections

Hassan ABEDI SARVESTANI

Journal Article

Non linear modeling of three-dimensional reinforced and fiber concrete structures

Fatiha IGUETOULENE, Youcef BOUAFIA, Mohand Said KACHI

Journal Article

Seismic retrofitting of severely damaged RC connections made with recycled concrete using CFRP sheets

Yasmin MURAD, Wassel AL BODOUR, Ahmed ASHTEYAT

Journal Article

Special Column on

Journal Article

Risk evaluation for the task transfer of an aircraft maintenance program based on a multielement connection

Journal Article