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Flexural-torsional buckling behavior of aluminum alloy beams

Xiaonong GUO,Zhe XIONG,Zuyan SHEN

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 2,   Pages 163-175 doi: 10.1007/s11709-014-0272-8

Abstract: This paper presents an investigation on the flexural-torsional buckling behavior of aluminum alloy beamsbeams under concentrated loads, the failure pattern, load-deformation curves, bearing capacity and flexural-torsionalIt is found that all the beam specimens collapsed in the flexural-torsional buckling with excessive deformationMoreover, the span, loading location and slenderness ratio influence the flexural-torsional bucklingSecondly, besides the experiments, a finite element method (FEM) analysis on the flexural-torsional buckling

Keywords： flexural-torsional buckling     aluminum alloy beams (AAB)     finite element method (FEM)     theoretical formula    

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Lateral-torsional buckling capacity assessment of web opening steel girders by artificial neural networks

Yasser SHARIFI,Sajjad TOHIDI

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2,   Pages 167-177 doi: 10.1007/s11709-014-0236-z

Abstract: A three-dimensional (3D) finite element (FE) model using ABAQUS for the elastic flexural torsional analysisof I-beams has been used to assess the effect of web opening on the lateral buckling moment capacitynetwork (ANN) approach has been also employed to derive empirical formulae for predicting the lateral-torsionalIt is found out that the proposed formulae can accurately predict residual lateral buckling capacitiesHence, the results of this study can be used for better prediction of buckling life of web opening of

Keywords： steel I-beams     lateral-torsional buckling     finite element (FE) method     artificial neural network (ANN) approach    

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Proposing two new methods to decrease lateral-torsional buckling in reduced beam section connections

Samira EBRAHIMI; Nasrin BAKHSHAYESH EGHBALI; Mohammad Mehdi AHMADI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12,   Pages 1581-1598 doi: 10.1007/s11709-022-0886-1

Abstract: Reduced web section (RWS) connections can prevent lateral-torsional buckling and web local buckling experiencedAccording to the results, RBS-ST and RW-RBS connections can decrease or even eliminate lateral-torsionalbuckling and web local buckling in RBS connection.

Keywords： RBS     RBS-ST     RW-RBS     lateral-torsional buckling     cyclic performance    

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Out-of-plane elastic buckling load and strength design of space truss arch with a rectangular section

Senping WANG; Xiaolong LIU; Bo YUAN; Minjie SHI; Yanhui WEI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 9,   Pages 1141-1152 doi: 10.1007/s11709-022-0866-5

Abstract: Firstly, the flexural stiffness and torsional stiffness of space truss arches are deduced.The calculation formula of out-of-plane elastic buckling loads of the space truss arch is derived basedon the classical solution of out-of-plane flexural-torsional buckling loads of the solid web arch.for the calculation of the arch with a small rise-span ratio, the formula for out-of-plane elastic bucklingcomponents of space truss circular arches bear only axial force, the design formulas to prevent the local buckling

Keywords： torsional stiffness     strength design     elastic buckling     space truss arches     out-of-plane    

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Cyclic responses of three 2-story seismic concentrically braced frames

Ching-Yi TSAI, Keh-Chyuan TSAI, Chih-Han LIN, Chih-Yu WEI, Kung-Juin WANG, Yi-Jer YU, An-Chien WU,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3,   Pages 287-301 doi: 10.1007/s11709-010-0087-1

Abstract: Severe brace local buckling and out-of-plane displacements were observed during each test.The analytical results confirm that the severe out-of-plane buckling of the braces can be accurately

Keywords： concentrically braced frame (CBF)     full-scale test     finite element (FE) analysis     flexural buckling     localbuckling    

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Mechanism of self-excited torsional vibration of locomotive driving system

Jianxin LIU, Huaiyun ZHAO, Wanming ZHAI

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 465-469 doi: 10.1007/s11465-010-0115-9

Abstract: A single wheelset drive model and 2-DOFs torsional vibration model were established to investigate theself-excited torsional vibration of a locomotive driving system.The simulation results indicate that the self-excited torsional vibration occurs when the steady slip

Keywords： locomotive     driving system     self-excited torsional vibration     mechanism     influence factor    

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Thermal buckling behavior of laminated composite plates: a finite-element study

Houdayfa OUNIS,Abdelouahab TATI,Adel BENCHABANE

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 1,   Pages 41-49 doi: 10.1007/s11465-014-0284-z

Abstract:

In this paper, the thermal buckling behavior of composite laminated plates under a uniform temperatureof four nodes and 32 degrees of freedom (DOF), previously developed for the bending and mechanical bucklingof laminated composite plates, is extended to investigate the thermal buckling behavior of laminatedThe study showed that: 1) the critical buckling temperature generally decreases with the increasing of, and 2) the boundary conditions and the orientation angles significantly affect the critical buckling

Keywords： thermal buckling     laminated composite plates     anisotropy     critical buckling temperature     finite-element method    

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Experimental study and numerical simulation on compressive buckling behavior of thin steel skins in unilateral

Nicholas KEAGE, Christopher MAIOLO, Rebecca PIEROTTI, Xing MA

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 335-343 doi: 10.1007/s11709-011-0121-y

Abstract: test and finite element analysis has been undertaken to further investigate the effects of contact bucklingboth analyses have been examined and compared to data established from previous studies on contact bucklingThe result of the investigation has confirmed contact buckling theories and has foreshadowed the onsetof the newly observed phenomenon of secondary contact buckling.

Keywords： compressive     buckling     thin steel skins     unilateral contact     rigid constraints    

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Finding buckling points for nonlinear structures by dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Hossein ESTIRI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 23-61 doi: 10.1007/s11709-019-0549-z

Abstract: Among the finding related to the structural static path are the critical and buckling points for nonlinear

Keywords： load factor     external work     dynamic relaxation     static equilibrium path     large displacement    

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Uncertainty of concrete strength in shear and flexural behavior of beams using lattice modeling

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 2,   Pages 306-325 doi: 10.1007/s11709-022-0890-5

Abstract: This paper numerically studied the effect of uncertainty and random distribution of concrete strength in beams failing in shear and flexure using lattice modeling, which is suitable for statistical analysis. The independent variables of this study included the level of strength reduction and the number of members with reduced strength. Three levels of material deficiency (i.e., 10%, 20%, 30%) were randomly introduced to 5%, 10%, 15%, and 20% of members. To provide a database and reliable results, 1000 analyses were carried out (a total of 24000 analyses) using the MATLAB software for each combination. Comparative studies were conducted for both shear- and flexure-deficit beams under four-point loading and results were compared using finite element software where relevant. Capability of lattice modeling was highlighted as an efficient tool to account for uncertainty in statistical studies. Results showed that the number of deficient members had a more significant effect on beam capacity compared to the level of strength deficiency. The scatter of random load-capacities was higher in flexure (range: 0.680–0.990) than that of shear (range: 0.795–0.996). Finally, nonlinear regression relationships were established with coefficient of correlation values (R2) above 0.90, which captured the overall load–deflection response and level of load reduction.

Keywords： lattice modeling     shear failure     flexural failure     uncertainty     deficiency     numerical simulation    

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A novel structural modification to eliminate the early coupling between bending and torsional mode shapes

Nazim Abdul NARIMAN

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 131-142 doi: 10.1007/s11709-016-0376-4

Abstract: structural modification approach has been adopted to eliminate the early coupling between the bending and torsionalBoth vertical and torsional displacements are calculated at the mid span of the deck to analyze boththe bending and the torsional stiffness of the system before and after the structural modification.Furthermore, the coupling between the vertical and torsional mode shapes has been removed to larger naturalThe novel structural approach manifested great efficiency in increasing vertical and torsional stiffness

Keywords： aeroelastic instability     structural damping     flutter wind speed     bending stiffness     torsional stiffness    

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Hybrid flexural components: Testing pre-stressed steel and GFRP bars together as reinforcement for flexural

Mohammed FARUQI, Oved I. MATA, Francisco AGUINIGA

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 3,   Pages 352-360 doi: 10.1007/s11709-017-0453-3

Abstract: The experimental flexural strength and deflection of slabs were compared with their respective sizes

Keywords： Partial pre-stressing     composite structures     GFRP bars    

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Probabilistic stability of uncertain composite plates and stochastic irregularity in their buckling mode

Frontiers of Structural and Civil Engineering   Pages 179-190 doi: 10.1007/s11709-022-0888-z

Abstract: mechanical properties of the composite plate were considered Gaussian random fields and their effects on the bucklingof spatially varying stochastic properties on the critical load of the plate and the irregularity of bucklingmodeling the plate properties as random fields, a significant stochastic irregularity is obtained in buckling

Keywords： composite plate     stochastic assume mode method     Karhunen−Loève theorem     polynomial chaos approach     plate buckling     irregularity in buckling mode shapes    

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Analysis of stiffness and flexural strength of a reinforced concrete beam using an invented reinforcement

Nazim Abdul NARIMAN, Martin HUSEK, Ilham Ibrahim MOHAMMAD, Kaywan Othman AHMED, Diyako DILSHAD, Ibrahim KHIDR

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 378-389 doi: 10.1007/s11709-021-0706-z

Abstract: The results of the flexure test were collected and analyzed, and the flexural strength, the rate of damageThe results of the experimental tests showed that the flexural strength of the invented reinforcementMoreover, the flexural cracks decreased to a significant extent, manifesting extremely small and narrowwere verified through numerical simulations, which demonstrated excellent similarities between the flexural

Keywords： three-point flexure test     softening stage     flexural crack     flexural strain    

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An analytical method for calculating torsional constants for arbitrary complicated thin-walled cross-sections

DU Baisong, GE Yaojun, ZHOU Zheng

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 293-297 doi: 10.1007/s11709-007-0038-7

Abstract: In this paper, an analytical method is proposed for calculating torsional constants for complicated thin-walledAfter changing the form of the equations and combining these two unknowns into one, torsional functionAll the torsional functions can be easily obtained from these homogeneous linear equations, and torsionalconstants can be easily obtained from the torsional functions.The advantage of this method is that we can easily and directly obtain torsional constants from the torsional

Keywords： homogeneous     complicated thin-walled     numerical example     advantage     torsional function    

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Title Author Date Type Operation

Flexural-torsional buckling behavior of aluminum alloy beams

Xiaonong GUO,Zhe XIONG,Zuyan SHEN

Journal Article

Lateral-torsional buckling capacity assessment of web opening steel girders by artificial neural networks

Yasser SHARIFI,Sajjad TOHIDI

Journal Article

Proposing two new methods to decrease lateral-torsional buckling in reduced beam section connections

Samira EBRAHIMI; Nasrin BAKHSHAYESH EGHBALI; Mohammad Mehdi AHMADI

Journal Article

Out-of-plane elastic buckling load and strength design of space truss arch with a rectangular section

Senping WANG; Xiaolong LIU; Bo YUAN; Minjie SHI; Yanhui WEI

Journal Article

Cyclic responses of three 2-story seismic concentrically braced frames

Ching-Yi TSAI, Keh-Chyuan TSAI, Chih-Han LIN, Chih-Yu WEI, Kung-Juin WANG, Yi-Jer YU, An-Chien WU,

Journal Article

Mechanism of self-excited torsional vibration of locomotive driving system

Jianxin LIU, Huaiyun ZHAO, Wanming ZHAI

Journal Article

Thermal buckling behavior of laminated composite plates: a finite-element study

Houdayfa OUNIS,Abdelouahab TATI,Adel BENCHABANE

Journal Article

Experimental study and numerical simulation on compressive buckling behavior of thin steel skins in unilateral

Nicholas KEAGE, Christopher MAIOLO, Rebecca PIEROTTI, Xing MA

Journal Article

Finding buckling points for nonlinear structures by dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Hossein ESTIRI

Journal Article

Uncertainty of concrete strength in shear and flexural behavior of beams using lattice modeling

Journal Article

A novel structural modification to eliminate the early coupling between bending and torsional mode shapes

Nazim Abdul NARIMAN

Journal Article

Hybrid flexural components: Testing pre-stressed steel and GFRP bars together as reinforcement for flexural

Mohammed FARUQI, Oved I. MATA, Francisco AGUINIGA

Journal Article

Probabilistic stability of uncertain composite plates and stochastic irregularity in their buckling mode

Journal Article

Analysis of stiffness and flexural strength of a reinforced concrete beam using an invented reinforcement

Nazim Abdul NARIMAN, Martin HUSEK, Ilham Ibrahim MOHAMMAD, Kaywan Othman AHMED, Diyako DILSHAD, Ibrahim KHIDR

Journal Article

An analytical method for calculating torsional constants for arbitrary complicated thin-walled cross-sections

DU Baisong, GE Yaojun, ZHOU Zheng

Journal Article