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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Society of Steel Construction
Journal Basic Information
Journal DOI :
Korean Society of Steel Construction
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Volume & Issues
Volume 14, Issue 5 - Oct 2002
Volume 1, Issue 4 - 00 2002
Volume 14, Issue 6 - 00 2002
Volume 14, Issue 4 - 00 2002
Volume 14, Issue 3 - 00 2002
Volume 14, Issue 2 - 00 2002
Volume 14, Issue 1 - 00 2002
Volume 13, Issue 6 - 00 2002
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An Experimental Study on Stength of Slender Square Tube Columns Filled with High Strength Concrete
Seo, Seong Yeon ; Chung, Jin An ;
Journal of Korean Society of Steel Construction, volume 14, issue 4, 2002, Pages 471~479
In this paper, 18 square CFT columns filled with high-strength concrete were tested under concentric or eccentric axial loading. Two parameters of the experimental program included the buckling length-section depth ratio (
/D) and the eccentricity of the appled compressive load (e). In additon, mechanical properties such as the compressive concrete strength and compressive and tensile steel strength were measured and incorporated into the material models for the stress-strain relationships of concrete and steel. This model was used in an elasto-plastic analysis in order to predict the behavior of the slender CFT columns. Observtions of the failure mode during the tests under axial loadig were also presented. The strengths obtained from the analysis. Recommendations for Design, and Constructions of CFT structures were presented, as verified by the experimental results.
An Experimental Study on the Bond Strengths for Concrete Filled Steel Tube Columns using a Push-Out Test
Woo, Hae Sung ; Kim, Jin Ho ; Choi, Sung Mo ;
Journal of Korean Society of Steel Construction, volume 14, issue 4, 2002, Pages 481~487
Currently, the load transfer's mechanism from a beam to a column has yet to ve clarified in a concrete filled steel tubular (CFT) structure with a connection type of an exterior diaphragm. The loads for each floor are transferred to the concrete core from a steel beam through ha contacted face between an in-filled concrete and the interior surface of a steel tube. Thus, a Push-Out test was performed to investigate the load transfer mechanism. A total of 30 samples were tested to confirm the bond stress and/or axial load distribution between a steel tube and in-filled concrete for CFT column. The main parameters considered for this study included concrete type, steel tube-shape/length, and the effect of a weld joint wit ha backing strip for a column splice. Test results were summarized to confirm load transfer behavior between a concrete and steel tube for each experimental parameter, using the analytical approach to verify experimental results.
An Experimental Study of Cyclic Seismic Behavior of Steel Moment Connections Reinforced with Ribs
Lee, Cheol Ho ; Lee, Jae Kwang ; Jung, Jong Hyun ; Oh, Myeong Ho ; Koo, Eun Sook ;
Journal of Korean Society of Steel Construction, volume 14, issue 4, 2002, Pages 499~508
A simple design method for rib-reinforced seismic steel moment connections has been recently proposed based on the equivalent strut model. An experimental program was implemented to verify the proposed design method, as well as develop the schemes that will prevent cracking at the rib tip where stress concentration was evident. All specimens designed using the proposed method were able to develop a satisfactory connection plastic rotation of 0.04 radian. In addition to rib reinforcement, slight beam flange trimming pushed the plastic hinging and local buckling of the beam away from the rip tip and effectively reduced cracking potential at the rib tip. Using strain gage readings, the strut action of the rib and resulting reverse shear in the beam web were also experimentally identified.
Improved Static Element Stiffness Matrix of Thin-Walled Beam-Column Elements
Yun, Hee Taek ; Kim, Nam Il ; Kim, Moon Young ; Gil, Heung Bae ;
Journal of Korean Society of Steel Construction, volume 14, issue 4, 2002, Pages 509~518
In order to perform the spatial buckling and static analysis of the nonsymmetric thin-walled beam-column element, improved exact static stiffness matrices were evaluated using equilibrium equation and force-deformation relationships. This numerical technique was obtained using a generalized linear eigenvalue problem, by introducing 14 displacement parameters and system of linear algebraic equations with complex matrices. Unlike the evaluation of dynamic stiffness matrices, some zero eigenvalues were included. Thus, displacement parameters related to these zero eigenvalues were assumed as polynomials, with their exact distributions determined using the identity condition. The exact displacement functions corresponding to three loadingcases for initial stress-resultants were then derived, by consistently combining zero and nonzero eigenvalues and corresponding eigenvectors. Finally, exact static stiffness matrices were determined by applying member force-displacement relationships to these displacement functions. The buckling loads and displacement of thin-walled beam were evaluated and compared with analytic solutions and results using ABAQUS' shell element or straight beam element.
Effects of Geometrical Shape on the Free Vibration of Laminated Composite Conical Shells
Son, Byung Jik ; Ji, Hyo Seon ; Chang, Suk Yun ;
Journal of Korean Society of Steel Construction, volume 14, issue 4, 2002, Pages 519~527
Shell structures have become critical in the design of pressure vessels, submarine hulls, ship hulls, airplane structures, concrete roofs, containers for liquids, and many other structures. This study presented the feature of the free vibration of anisotropic laminated conical shells according to transverse shear deformation effects. Composite materials are composed of two or more different materials in order to produce desirable properties for structural strength. Since their behavior is very complex, it is almost impossible to solve the analytical solutions. This effects of subtended and vertex angles and other geometric parameters on vibration were investigated in a comprehensive parametric study. Selected vibration mode shapes were illustrated, to enable the physical understanding of vibration of laminated composite conical shells.
Elastic Shear Buckling Characteristics of Circularly Corrugated Plates
Han, Taek Hee ; Lim, Nam Hyoung ; Park, Nam Hoi ; Kang, Young Jong ;
Journal of Korean Society of Steel Construction, volume 14, issue 4, 2002, Pages 529~538
Applications of corrugated plates (or folded plates) have been recently increasing due to certain economic and structural advantages. Likewise, applications of corrugated plates has been increasing because they are stronger compared to flat plates. Therefore, specifications of corrugated plates should be determined. There are many design details in almost every specification for flat plates. However, except the bending strength and the normal strength, there are no detailed design guides such as shear strength. Thus, it is difficult for engineers to design structures consisting of corrugated plates. As such, engineers need a guide in designing corrugated plates. Extensive numerical study was conducted in order to identify the relationship between the shear strength and geometric conditions for corrugated plates. An eight-node thin shell element (QSL8) of the commercial program LUSAS (version 13.2) was used. The study was able to come up with a formula that helps determine the shear strength of corrugated plates under various geometric conditions, the size of corrugation, the curvature of corrugation, and the thickness of the corrugated plate. Likewise, corrugated plates were found to have a higher shear buckling strength than flat plates.
Initial Equilibrium State Analysis of Cable Stayed Bridges Considering Axial Deformation
Kim, Je Choon ; Chang, Sung Pil ;
Journal of Korean Society of Steel Construction, volume 14, issue 4, 2002, Pages 539~547
The study proposed the initial equilibrium state analysis method that considers axial deformation, in order to accurately determine the initial shape of a cable-stayed bridge. Sepecifically, the proposed method adopted the successive iteration method. In order to evaluate appropriate initial cable force introduced in the initial equilibrium state analysis, parametric studies were performed and a useful linear analysis method proposed. The geometrically nonlinear static behaviors of cable-stayed bridges were considered, using three-dimensional frame element and elastic catenary cable element. The usefulness and applicability of the analytic method proposed in this study were demonstrated using numerical examples, including a real cable-stayed bridge. The algorithm, is applicable in cases wherein axial deformation is not adopted in the fabrication camber, or final cable force is adjusted to eliminate construction and fabrication errors occurring during construction.