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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Steel and Composite Structures
Journal Basic Information
Journal DOI :
Editor in Chief :
Chang-Koon Choi / Brian Uy / Dennis Lam
Volume & Issues
Volume 19, Issue 6 - Dec 2015
Volume 19, Issue 5 - Nov 2015
Volume 19, Issue 4 - Oct 2015
Volume 19, Issue 3 - Sep 2015
Volume 19, Issue 2 - Aug 2015
Volume 19, Issue 1 - Jul 2015
Volume 18, Issue 6 - Jun 2015
Volume 18, Issue 5 - May 2015
Volume 18, Issue 4 - Apr 2015
Volume 18, Issue 3 - Mar 2015
Volume 18, Issue 2 - Feb 2015
Volume 18, Issue 1 - Jan 2015
Selecting the target year
A new higher-order shear and normal deformation theory for functionally graded sandwich beams
Bennai, Riadh ; Atmane, Hassen Ait ; Tounsi, Abdelouahed ;
Steel and Composite Structures, volume 19, issue 3, 2015, Pages 521~546
DOI : 10.12989/scs.2015.19.3.521
A new refined hyperbolic shear and normal deformation beam theory is developed to study the free vibration and buckling of functionally graded (FG) sandwich beams under various boundary conditions. The effects of transverse shear strains as well as the transverse normal strain are taken into account. Material properties of the sandwich beam faces are assumed to be graded in the thickness direction according to a simple power-law distribution in terms of the volume fractions of the constituents. The core layer is still homogeneous and made of an isotropic material. Equations of motion are derived from Hamilton's principle. Analytical solutions for the bending, free vibration and buckling analyses are obtained for simply supported sandwich beams. Illustrative examples are given to show the effects of varying gradients, thickness stretching, boundary conditions, and thickness to length ratios on the bending, free vibration and buckling of functionally graded sandwich beams.
Seismic behavior of rebar-penetrated joint between GCFST column and RGC beam
Li, Guochang ; Fang, Chen ; An, Yuwei ; Zhao, Xing ;
Steel and Composite Structures, volume 19, issue 3, 2015, Pages 547~567
DOI : 10.12989/scs.2015.19.3.547
The paper makes the experimental and finite-element-analysis investigation on the seismic behavior of the rebar-penetrated joint between gangue concrete filled steel tubular column and reinforced gangue concrete beam under low cyclic reversed loading. Two specimens are designed and conducted for the experiment to study the seismic behavior of the rebar-penetrated joint under cyclic loading. Then, finite element analysis models of the rebar-penetrated joint are developed using ABAQUS 6.10 to serve as the complement of the experiment and further analyze the seismic behavior of the rebar-penetrated joint. Finite element analysis models are also verified by the experimental results. Finally, the hysteretic performance, the bearing capacity, the strength degradation, the rigidity degradation, the ductility and the energy dissipation of the rebar-penetrated joint are evaluated in detail to investigate the seismic behavior of the rebar-penetrated joint through experimental results and finite element analysis results. The research demonstrates that the rebar-penetrated joint between gangue concrete filled steel tubular column and reinforced gangue concrete beam, with full and spindle-shaped load-displacement hysteretic curves, shows generally the high ductility and the outstanding energy-dissipation capacity. As a result, the rebar-penetrated joint exhibits the excellent seismic performance and meets the earthquake-resistant requirements of the codes in China. The research provides some references and suggestions for the application of the rebar-penetrated joint in the projects.
State detection of explosive welding structure by dual-tree complex wavelet transform based permutation entropy
Si, Yue ; Zhang, ZhouSuo ; Cheng, Wei ; Yuan, FeiChen ;
Steel and Composite Structures, volume 19, issue 3, 2015, Pages 569~583
DOI : 10.12989/scs.2015.19.3.569
Recent years, explosive welding structures have been widely used in many engineering fields. The bonding state detection of explosive welding structures is significant to prevent unscheduled failures and even catastrophic accidents. However, this task still faces challenges due to the complexity of the bonding interface. In this paper, a new method called dual-tree complex wavelet transform based permutation entropy (DTCWT-PE) is proposed to detect bonding state of such structures. Benefiting from the complex analytical wavelet function, the dual-tree complex wavelet transform (DTCWT) has better shift invariance and reduced spectral aliasing compared with the traditional wavelet transform. All those characters are good for characterizing the vibration response signals. Furthermore, as a statistical measure, permutation entropy (PE) quantifies the complexity of non-stationary signals through phase space reconstruction, and thus it can be used as a viable tool to detect the change of bonding state. In order to more accurate identification and detection of bonding state, PE values derived from DTCWT coefficients are proposed to extract the state information from the vibration response signal of explosive welding structure, and then the extracted PE values serve as input vectors of support vector machine (SVM) to identify the bonding state of the structure. The experiments on bonding state detection of explosive welding pipes are presented to illustrate the feasibility and effectiveness of the proposed method.
Fatigue behavior of circular hollow tube and wood filled circular hollow steel tube
Malagi, Ravindra R. ; Danawade, Bharatesh A. ;
Steel and Composite Structures, volume 19, issue 3, 2015, Pages 585~599
DOI : 10.12989/scs.2015.19.3.585
This paper presents the experimental work on fatigue life and specific fatigue strength of circular hollow sectioned steel tube and wood filled circular hollow section steel tube. Burning effect was observed in the case of circular hollow sectioned steel tube when it is subjected to Maximum bending moment of 19613.30 N-mm at 4200 rpm, but this did not happen in the case of wood filled hollow section. Statistical analysis was done based on the experimental data and relations have been built to predict the number of cycles for the applied stress or vice versa. The relations built in this paper can safely be applied for design of the fatigue life or fatigue strength of circular hollow sections and wood filled hollow sections. Results were validated by static specific bending strengths determined by ANSYS using a known applied load.
Investigating the fatigue failure characteristics of A283 Grade C steel using magnetic flux detection
Arifin, A. ; Jusoh, W.Z.W. ; Abdullah, S. ; Jamaluddin, N. ; Ariffin, A.K. ;
Steel and Composite Structures, volume 19, issue 3, 2015, Pages 601~614
DOI : 10.12989/scs.2015.19.3.601
The Metal Magnetic Memory (MMM) method is a non-destructive testing method based on an analysis of the self-magnetic leakage field distribution on the surface of a component. It is used for determining the stress concentration zones or any irregularities on the surface or inside the components fabricated from ferrous-based materials. Thus, this paper presents the MMM signal behaviour due to the application of fatigue loading. A series of MMM data measurements were performed to obtain the magnetic leakage signal characteristics at the elastic, pre-crack and crack propagation regions that might be caused by residual stresses when cyclic loadings were applied onto the A283 Grade C steel specimens. It was found that the MMM method was able to detect the defects that occurred in the specimens. In addition, a justification of the Self Magnetic Flux Leakage patterns is discussed for demonstrating the effectiveness of this method in assessing the A283 Grade C steel under cyclic loadings.
Behaviour and design of composite beams subjected to flexure and axial load
Kirkland, Brendan ; Uy, Brian ;
Steel and Composite Structures, volume 19, issue 3, 2015, Pages 615~633
DOI : 10.12989/scs.2015.19.3.615
Composite steel-concrete beams are used frequently in situations where axial forces are introduced. Some examples include the use in cable-stayed bridges or inclined members in stadia and bridge approach spans. In these situations, the beam may be subjected to any combination of flexure and axial load. However, modern steel and composite construction codes currently do not address the effects of these combined actions. This study presents an analysis of composite beams subjected to combined loadings. An analytical model is developed based on a cross-sectional analysis method using a strategy of successive iterations. Results derived from the model show an excellent agreement with existing experimental results. A parametric study is conducted to investigate the effect of axial load on the flexural strength of composite beams. The parametric study is then extended to a number of section sizes and employs various degrees of shear connection. Design models are proposed for estimating the flexural strength of an axially loaded member with full and partial shear connection.
Vibration analysis of a pre-stressed laminated composite curved beam
Ozturk, Hasan ;
Steel and Composite Structures, volume 19, issue 3, 2015, Pages 635~659
DOI : 10.12989/scs.2015.19.3.635
In this study, natural frequency analysis of a large deflected cantilever laminated composite beam fixed at both ends, which forms the case of a pre-stressed curved beam, is investigated. The laminated beam is considered to have symmetric and asymmetric lay-ups and the effective flexural modulus of the beam is used in the analysis. In order to obtain the pre-stressed composite curved beam case, an external vertical concentrated load is applied at the free end of a cantilever laminated composite beam and then the loading point of the deflected beam is fixed. The non-linear deflection curve of the flexible beam undergoing large deflection is obtained by the Reversion Method. The curved laminated composite beam is modeled by using the Finite Element Method with a straight-beam element approach. The effects of orientation angle and vertical load on the natural frequency parameter for the first four modes are examined and the results obtained are given in graphics. It has been found that the effect of the load parameter, which forms the curved laminated beam, on the natural frequency parameter, almost disappears after a certain value of the load parameter. This certain value differs for each laminated curved beam and each vibration mode.
A numerical analysis on the performance of buckling restrained braces at fire-study of the gap filler effect
Talebi, Elnaz ; Tahir, Mahmood Md. ; Zahmatkesh, Farshad ; Kueh, Ahmad B.H. ;
Steel and Composite Structures, volume 19, issue 3, 2015, Pages 661~678
DOI : 10.12989/scs.2015.19.3.661
Buckling Restrained Braces (BRB) have been widely used in the construction industry as they utilize the most desirable properties of both constituent materials, i.e., steel and concrete. They present excellent structural qualities such as high load bearing capacity, ductility, energy-absorption capability and good structural fire behaviour. The effects of size and type of filler material in the existed gap at the steel core-concrete interface as well as the element's cross sectional shape, on BRB's fire resistance capacity was investigated in this paper. A nonlinear sequentially-coupled thermal-stress three-dimensional model was presented and validated by experimental results. Variation of the samples was described by three groups containing, the steel cores with the same cross section areas and equal yield strength but different materials (metal and concrete) and sizes for the gap. Responses in terms of temperature distribution, critical temperature, heating elapsed time and contraction level of BRB element were examined. The study showed that the superior fire performance of BRB was obtained by altering the filler material in the gap from metal to concrete as well as by increasing the size of the gap. Also, cylindrical BRB performed better under fire conditions compared to the rectangular cross section.
Numerical analysis of FGM plates with variable thickness subjected to thermal buckling
Bouguenina, Otbi ; Belakhdar, Khalil ; Tounsi, Abdelouahed ; Adda Bedia, El Abbes ;
Steel and Composite Structures, volume 19, issue 3, 2015, Pages 679~695
DOI : 10.12989/scs.2015.19.3.679
A numerical solution using finite difference method to evaluate the thermal buckling of simply supported FGM plate with variable thickness is presented in this research. First, the governing differential equation of thermal stability under uniform temperature through the plate thickness is derived. Then, the governing equation has been solved using finite difference method. After validating the presented numerical method with the analytical solution, the finite difference formulation has been extended in order to include variable thickness. The accuracy of the finite difference method for variable thickness plate has been also compared with the literature where a good agreement has been found. Furthermore, a parametric study has been conducted to analyze the effect of material and geometric parameters on the thermal buckling resistance of the FGM plates. It was found that the thickness variation affects isotropic plates a bit more than FGM plates.
Prediction of hysteretic energy demands in steel frames using vector-valued IMs
Bojorquez, Eden ; Astorga, Laura ; Reyes-Salazar, Alfredo ; Teran-Gilmore, Amador ; Velazquez, Juan ; Bojorquez, Juan ; Rivera, Luz ;
Steel and Composite Structures, volume 19, issue 3, 2015, Pages 697~711
DOI : 10.12989/scs.2015.19.3.697
It is well known the importance of considering hysteretic energy demands for the seismic assessment and design of structures. In such a way that it is necessary to establish new parameters of the earthquake ground motion potential able to predict energy demands in structures. In this paper, several alternative vector-valued ground motion intensity measures (IMs) are used to estimate hysteretic energy demands in steel framed buildings under long duration narrow-band ground motions. The vectors are based on the spectral acceleration at first mode of the structure Sa(
) as first component. As the second component, IMs related to peak, integral and spectral shape parameters are selected. The aim of the study is to provide new parameters or vector-valued ground motion intensities with the capacity of predicting energy demands in structures. It is concluded that spectral-shape-based vector-valued IMs have the best relation with hysteretic energy demands in steel frames subjected to narrow-band earthquake ground motions.
Viscous fluid induced vibration and instability of FG-CNT-reinforced cylindrical shells integrated with piezoelectric layers
Bidgoli, Mahmood Rabani ; Karimi, Mohammad Saeed ; Arani, Ali Ghorbanpour ;
Steel and Composite Structures, volume 19, issue 3, 2015, Pages 713~733
DOI : 10.12989/scs.2015.19.3.713
In this paper, viscous fluid induced nonlinear free vibration and instability analysis of a functionally graded carbon nanotube-reinforced composite (CNTRC) cylindrical shell integrated with two uniformly distributed piezoelectric layers on the top and bottom surfaces of the cylindrical shell are presented. Single-walled carbon nanotubes (SWCNTs) are selected as reinforcement and effective material properties of FG-CNTRC cylindrical shell are assumed to be graded through the thickness direction and are estimated through the rule of mixture. The elastic foundation is modeled by temperature-dependent orthotropic Pasternak medium. Considering coupling of mechanical and electrical fields, Mindlin shell theory and Hamilton's principle, the motion equations are derived. Nonlinear frequency and critical fluid velocity of sandwich structure are calculated based on differential quadrature method (DQM). The effects of different parameters such as distribution type of SWCNTs, volume fractions of SWCNTs, elastic medium and temperature gradient are discussed on the vibration and instability behavior of the sandwich structure. Results indicate that considering elastic foundation increases frequency and critical fluid velocity of system.
New technique for strengthening reinforced concrete beams with composite bonding steel plates
Yang, Su-hang ; Cao, Shuang-yin ; Gu, Rui-nan ;
Steel and Composite Structures, volume 19, issue 3, 2015, Pages 735~757
DOI : 10.12989/scs.2015.19.3.735
Composite bonding steel plate (CBSP) is a newly developed type of structure strengthened technique applicable to the existing RC beam. This composite structure is applicable to strengthening the existing beam bearing high load. The strengthened beam consists of two layers of epoxy bonding prestressed steel plates and the RC beam sandwiched in between. The bonding enclosed and prestressed U-shaped steel jackets are applied at the beam sides. This technique is adopted in case of structures with high longitudinal reinforcing bar ratio and impracticable unloading. The prestress can be generated on the strengthening steel plates and jackets by using the CBSP technique before loading. The test results of full-scale CBSP strengthened beams show that the strength and stiffness are enhanced without reduction of their ductility. It is demonstrated that the strain hysteresis effect can be effectively overcome after prestressing on the steel plates by using such technique. The applied plates and jackets can jointly behave together with the existing beam under the action of epoxy bonding and the mechanical anchorage of the steel jackets. The simplified formulas are proposed to calculate the prestress and the ultimate capacities of strengthened beams. The accuracy of formulas was verified with the experimental results.
Dynamic behavior of piezoelectric bimorph beams with a delamination zone
Zemirline, Adel ; Ouali, Mohammed ; Mahieddine, Ali ;
Steel and Composite Structures, volume 19, issue 3, 2015, Pages 759~776
DOI : 10.12989/scs.2015.19.3.759
The First Order Shear Deformation Theory (FOSDT) is considered to study the dynamic behavior of a bimorph beam. A delamination zone between the upper and the lower layer has been taken into consideration; the beam is discretised using the finite elements method (FEM). Several parameters are taken into consideration like structural damping, the geometry, the load nature and the configurations of the boundary conditions. Results show that the delamination between the upper and the lower layer affects considerably the actuation.
Fabrication and properties of in-situ Al/AlB
composite reinforced with high aspect ratio borides
Kayikci, Ramazan ; Savas, Omer ;
Steel and Composite Structures, volume 19, issue 3, 2015, Pages 777~787
DOI : 10.12989/scs.2015.19.3.777
Production and properties of metal matrix composites reinforced with an in-situ high aspect ratio
flake have been investigated. Boron 2.2wt.% was dissolved in pure Al and Al-Cu alloy at
by adding directly boron oxide which resulted in 4 vol.% reinforcing phase. The in-situ
flake concentration was increased up to 30 vol.% in order to increase the tensile strength of the composites. Hardness, compressive strength and tensile strength of the composite were measured and compared with their matrix. Results showed that 30 vol.%
composite show a 193% increase in the compressive strength and a 322% increase in compressive yield strength. Results also showed that ductility of composites decreases with adding