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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Society of Steel Construction
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Journal DOI :
Korean Society of Steel Construction
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Volume & Issues
Volume 9, Issue 4 - Dec 1997
Volume 9, Issue 3 - Sep 1997
Volume 9, Issue 2 - Jun 1997
Volume 9, Issue 1 - Mar 1997
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Buckling Analysis of Laminated Composite Plate and Shell Structures considering a Higher-Order Shear Deformation
Lee, Won Hong ; Yoon, Seok Ho ; Han, Seong Cheon ;
Journal of Korean Society of Steel Construction, volume 9, issue 1, 1997, Pages 3~11
Laminated composite shells exhibit properties comsiderably different from those of the single-layer shell. Thus, to obtain the more accurate solutions to laminated composite shells ptoblems, effects of shear strain should be condidered in analysis of them. A higher-order shear deformation theory requires no shear correction coefficients. This theory is used to determine the buckling loads of elastic shells. The theory accounts for parabolic distribution of the transverse shear through the thickness of the shell and rotary inertia. Exact solutions of simply-supported shells are obtained and the results are compared with the exact solutions of the first-order shear deformation theory, and the classical theory. The present theory predicts the buckling loads more accurately when compared to the first -order and classical theory.
Experimental Study on the Structural Behavior of Concrete-Filled Circular Tubular Column to H-Beam connections without Diaphragm
Kang, Hyun Sik ; Moon, Tae Sup ;
Journal of Korean Society of Steel Construction, volume 9, issue 1, 1997, Pages 13~22
This paper is concerned with an experimental study on structural behavior of Concrete-Filled Circular Tubular(CFCT) column to H-beam connections. The important parameters are the number of inner reinforced rib and the width of H-beam flange(100, 150, 200mm) with variable column thickness(5.8mm, 9.2mm, 12.5mm) around the joint between CFCT and H-beam. Test results are summarized for the displacement, strength, initial stiffness, failure mode and energy absorption capacity of each specimen. The purpose of this paper is to investigate the initial stiffness and the strength of connections to evaluate the structural behavior of the CFCT column to H-beam connections. From the discussion about the test results, the basic data for non diaphragm connection design would be suggested.
A Study on Traffic-Induced Vibration of Steel Girder-Bridge by Three-Dimensional Vehicle Model on Random Road Profile
Kim, Chul Woo ; Kawatani, Mitsuo ; Lee, Woo Hyun ;
Journal of Korean Society of Steel Construction, volume 9, issue 1, 1997, Pages 23~36
A Study on the Buckling Behavior of the Web of Box Girders
Lee, Sang Woo ; Kwon, Young Bong ;
Journal of Korean Society of Steel Construction, volume 9, issue 1, 1997, Pages 37~49
The buckling behavior of the web of steel girders are largely dependent on the size and the location of stiffeners and the restraining effect of top and bottom flanges. Elastic and inelastic buckling analyses based or the Spline Finite Strip Method were executed to study the stiffening effect of the longitudinal stiffener on the web of box girders and to find how the top and bottom flanges had effects on the web, where geometric boundary conditions were limited by both hinged, both fixed and the flange sections. The basic assumption for the longitudinal end boundary conditions was that the vertical stiffeners had the rigidity enough to force nil deflection line on the web panel so that the junction line between web and vertical stiffener was assumed to be hinged boundary conditions. The provisions on the longitudinal stiffener of the plate and box girders of the Korean Standard Highway Bridge Specifications(1995) and AASHTO Specifications(1994 LRFD) were compared with the results obtained numerically for the various longitudinal stiffener size of box girders. Simple equations and design curves for the longitudinal stiffener of the web were proposed for the practical use.
Reliability-Based Assessment of Safety and Residual Load Carrying-Capacity of Curved Steel-Box Ramp Bridges
Cho, Hyo-Nam ; Choi, Young-Min ; Min, Dae-Hong ;
Journal of Korean Society of Steel Construction, volume 9, issue 1, 1997, Pages 51~63
Highly curved steel-box bridges are usually constructed as ramp structures for the highway interchange and metropolitan elevated highway junction, but a number of these bridges are deteriorated and damaged to a significant degree due to heavy traffic. The main objective of the study is to develop a practical reliability-based assessment of safety and residual load carrying-capacity of existing curved steel-box ramp bridges. In the paper, for the realistic assessment of safety and residual load carrying-capacity of deteriorated and/or damaged curved steel-box bridges, an interactive non-linear limit state model is formulated based on the von Mises's combined stress yield criterion. It is demonstrated that the proposed model is effective for the assessment of reliability-based safety and the evaluation of residual load carrying-capacity of curved steel-box bridges. In addition, this study comparatively shows the applicability of various reliability analysis methods, and suggests a practical and effective one to be used in practice.
A Study on the Plane Stress Problem of Composite Laminated Annular Elements Using Finite Difference Method
Lee, Sang Youl ; Yhim, Sung Soon ; Chang, Suk Yoon ;
Journal of Korean Society of Steel Construction, volume 9, issue 1, 1997, Pages 65~79
Composite materials are consist of two or more different materials to produce desirable properties for structural strength. Because of their superiority in strength, corrosion resistance, and weight reduction, they are used extensively as structural members. The objective of this study is to present the effectivness of the laminated composite elements by analyzing in-plane displacement and stress of the anisotropic laminated annular elements. Anisotropic laminated structures are very difficult to analyze and apply, compared with isotropic and orthotropic cases for arbitrary boundaries and fiber angle -ply. Boundary conditions for the examples used in this study consist of two opposite edges clamped and the other two edges free, and finite difference method is used in this study for numerical analysis. From the numerical result, it is found that the program used in this study can be used to obtain the displacement of the straight beams considering it's transverse shear deformation as well as anisotropic laminated elements. Several numerical examples show the advantages of the stiffness increase when the angle-ply composite materials are used. Therefore it gives a guide in deciding how to make use of fiber's angle for the subtended angle, load cases, and boundary conditions.
Geometrically Non-Linear Analysis of Space Frames Considering Finite Rotations
Chu, Seok Beom ;
Journal of Korean Society of Steel Construction, volume 9, issue 1, 1997, Pages 81~94
Fatigue Damage Assessment for Steel Structures Subjected to Earthquake
Song, Jong Keol ; Yun, Chung Bang ; Lee, Dong Guen ;
Journal of Korean Society of Steel Construction, volume 9, issue 1, 1997, Pages 95~105
Structures subjected to strong seismic excitation may undergo inelastic deformation cycles. The resulting cumulative fatigue damage process reduces the ability of structures and components to withstand seismic loads. Yet, the present earthquake resistance design methods focus mainly on the maximum displacement ductility, ignoring the effect of the cyclic responses. The damage parameters closely related to the cumulative damage need to be properly reflected on the aseismic design methods. In this study, two cumulative damage assessment methods derived from the plastic fatigue theory are investigated. The one is based on the hysteretic ductility amplitude, and the other is based on the dissipated hysteretic energy. Both methods can consider the maximum ductility and the cyclic behavior of structural response. The validity of two damage methods has been examined for single degree of freedom structures with various natural frequencies against two different earthquake excitations.
A Study on Development for Joint of Concrete Filled Steel Tube Column and P.C Reinforced Concrete Beam(2) -The Behaviors Properties of Joint with Key Parameter, such as Strength of Concrete, size of Panel Zone and Axial Force ratio-
Park, Jung Min ; Lee, Sung Jo ; Kim, Wha Jung ;
Journal of Korean Society of Steel Construction, volume 9, issue 1, 1997, Pages 107~120
The purpose of this study is to develop composite structural system which is to have versatility in plan design and to improve economical efficieney, to maximise structural capacity than existing structural system. In this viewpoint, it was investigated to the properties of structural behaviors for i oint consisting of concrete filled steel square tube column and P.C reinforced concrete beam through a series of hysteretic behavior experiment. In the previous report, researched to the properties of joints with key parameters. such as Axial Force ratio and section types. From the based on previous results, this study investigated the properties of this joints with key parameters, such as strength of concrete, size of panel zone and Axial Force ratio. The obtained results are summarised as follows. (1) Investigating for the failure mode of the beam-to-column joint, the specimens of S,LL and LH series(except for L5H) presented flexural failure mode. (2) The initial stiffness of joint was increasd as the decrease of axial force ratio and increase of the concrete strength. (3) The rotation resisting capacity was effective as the increment of the concrete strength and decrement of the axial force ratio. (4) The emprical formula to predict the ultimate capacity of joint model to introduce decrease coefficient according to the axial force ratio to superimpose shearing strength of steel web(H section) and bending strength of reinforced concrete beam was expected.
A Study on the Load Carrying Capacity and Energy Absorption Capacity of the Concrete Filled Steel Tube Column
Chung, Kyung Soo ; Choi, Sung Mo ; Kim, Dong Kyu ;
Journal of Korean Society of Steel Construction, volume 9, issue 1, 1997, Pages 121~128
It has been reported by the existing papers that the ultimate load capacity and energy absorption capacity of the CFST column are considerably higher than those resulting from a simple addition of the capacities of the concrete and the steel tube. It is normally believed that the confined effect for the infilled concrete due to the hoop tension of steel at the parameter of cross sections can remarkably improve the ductility and energy absorption capacities of the CFST columns. This paper provides the results of a study on the load-carrying capacities and energy absorption capacities of the CFST columns, a numerical analysis method, i. e. N-M interaction curves and Moment curvature relationships. The numerical approaches are verified by comparing with the existing test results and the circular and square steel tube sections are selected to clarify the amount of confinement effects to improve the ultimate deformable capacity(a ultimate strain value) of the infilled concrete. Then, an adequate value of the ultimate strain of the infilled concrete and an equation of the ultimate capacity of the CFST column are suggested.
Modelling for Monotonic Behavior of the Panel Zone
Kim, Kee Dong ; Lee, Hak Eun ; Ko, Man Gi ; Kil, Heung Bae ;
Journal of Korean Society of Steel Construction, volume 9, issue 1, 1997, Pages 129~137
Modelling for Cyclic Behavior of the Panel Zone
Kim, Kee Dong ; Lee, Hak Eun ; Ko, Man Gi ; Kil, Heung Bae ;
Journal of Korean Society of Steel Construction, volume 9, issue 1, 1997, Pages 139~147
Effects of Haunch Reinforced Steel Moment Connection on Elastic Lateral Drift
Lee, Cheol Ho ;
Journal of Korean Society of Steel Construction, volume 9, issue 1, 1997, Pages 149~157