Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Computational Structural Engineering Institute of Korea
Journal Basic Information
Journal DOI :
The Computational Structural Engineering Institute
Editor in Chief :
Volume & Issues
Volume 25, Issue 6 - Dec 2012
Volume 25, Issue 5 - Oct 2012
Volume 25, Issue 4 - Aug 2012
Volume 25, Issue 3 - Jun 2012
Volume 25, Issue 2 - Apr 2012
Volume 25, Issue 1 - Feb 2012
Selecting the target year
Dynamic Simulation of a Shipbuilding Erection Crane based on Wire Rope Dynamics
Cha, Ju-Hwan ; Ku, Nam-Kug ; Roh, Myung-Il ; Lee, Kyu-Yeul ;
Journal of the Computational Structural Engineering Institute of Korea, volume 25, issue 2, 2012, Pages 119~127
DOI : 10.7734/COSEIK.2012.25.2.119
A wire rope is comprised of several metal wires which are wound together like a helix and it can resist relatively large axial loads, as compared with bending and torsional loads. A shipbuilding crane for erection such as a floating crane, a gantry crane, and a crawler crane hoists up and down heavy blocks by using these wire ropes. Thus, it is necessary to find dynamic properties of a wire rope in order to safely lift the blocks using the crane. In this study, a formula for calculating the tension and torsional moment acting on wire ropes of the crane was derived based on the existing study, and then dynamic simulation of the crane was performed based on the formula. The result shows that the dynamic simulation can be applied to find the safe method for block erection of shipyards.
Geometrical Non-linear Analyses of Tapered Variable-Arc-Length Beam subjected to Combined Load
Lee, Byoung-Koo ; Oh, Sang-Jin ; Lee, Tae-Eun ;
Journal of the Computational Structural Engineering Institute of Korea, volume 25, issue 2, 2012, Pages 129~138
DOI : 10.7734/COSEIK.2012.25.2.129
This paper deals with geometrical non-linear analyses of the tapered variable-arc-length beam, subjected to the combined load with an end moment and a point load. The beam is supported by a hinged end and a frictionless sliding support so that the axial length of the deformed beam can be increased by its load. Cross sections of the beam whose flexural rigidities are functionally varied with the axial coordinate. The simultaneous differential equations governing the elastica of such beam are derived on the basis of the Bernoulli-Euler beam theory. These differential equations are numerically solved by the iteration technique for obtaining the elastica of the deformed beam. For validating theories developed herein, laboratory scaled experiments are conducted.
Dynamic Algorithm for Solid Problems using MLS Difference Method
Yoon, Young-Cheol ; Kim, Kyeong-Hwan ; Lee, Sang-Ho ;
Journal of the Computational Structural Engineering Institute of Korea, volume 25, issue 2, 2012, Pages 139~148
DOI : 10.7734/COSEIK.2012.25.2.139
The MLS(Moving Least Squares) Difference Method is a numerical scheme that combines the MLS method of Meshfree method and Taylor expansion involving not numerical quadrature or mesh structure but only nodes. This paper presents an dynamic algorithm of MLS difference method for solving transient solid mechanics problems. The developed algorithm performs time integration by using Newmark method and directly discretizes strong forms. It is very convenient to increase the order of Taylor polynomial because derivative approximations are obtained by the Taylor series expanded by MLS method without real differentiation. The accuracy and efficiency of the dynamic algorithm are verified through numerical experiments. Numerical results converge very well to the closed-form solutions and show less oscillation and periodic error than FEM(Finite Element Method).
Serviceability Limit State and Response Modification Factors
Kook, Seung-Kyu ;
Journal of the Computational Structural Engineering Institute of Korea, volume 25, issue 2, 2012, Pages 149~154
DOI : 10.7734/COSEIK.2012.25.2.149
While the Earthquake Resistant Design Part of Korean Roadway Bridge Design Code provides design procedures for the No Collapse Requirement, requirements for the Serviceability Limit State are not clearly provided. The basic design method to meet the No Collapse Requirement is the spectrum analysis method using response modification factors and the Serviceability Limit State is determined by both the importance factor and the response modification factor applied in the design procedure. The importance factor can be simply applied according to the bridge importance category, however, in moderate/low seismic regions the application of the response modification factor may bring different result according to design conditions. In this study, for a typical bridge in the moderate/low seismic regions, determination procedures for the Serviceability Limit State are reviewed by carrying out earthquake resistant design and supplementary provisions for the Earthquake Resistant Design Part are identified based on the study results.
Nonlinear Analysis of Incheon Bridge Considering Time-Dependent Behavior of Concrete Pylon
Ha, Su-Bok ; Kim, Jin-Il ; Hwang, Chang-Hee ; Shin, Hyun-Mock ; Kim, Moon-Young ;
Journal of the Computational Structural Engineering Institute of Korea, volume 25, issue 2, 2012, Pages 155~162
DOI : 10.7734/COSEIK.2012.25.2.155
Recently, building of long span bridge is increasing and cable stayed bridges have large portion in civil projects. As the spans of bridges become longer, steel cable-stayed bridges have been constructed mainly for slim structure. But in many case, pylons are constructed by concrete for the stability of structures and the economy. Concrete is greatly influenced by the long-term behavior like creep and drying shrinkage, so analysis of stress redistribution and structural change in construction is required. In this study, as a cable stayed bridge with concrete pylon, Incheon Bridge is analyzed by nonlinear FEM analysis program RCAHEST. Through this analysis, time dependent effect of concrete pylon to whole cable stayed bridge system is studied.
Nonlinear Analysis of Anchor Head for High Strength Steel Strand
Noh, Myung-Hyun ; Seong, Taek-Ryong ; Kim, Jin-Kook ;
Journal of the Computational Structural Engineering Institute of Korea, volume 25, issue 2, 2012, Pages 163~173
DOI : 10.7734/COSEIK.2012.25.2.163
This study covers the nonlinear analysis of anchor head for high strength prestressing strand and presents necessary process in improving the performance of anchor head. The surface of wedge for strand is contacted to the surface of the wedge hole on anchor head when it is fitted into the wedge hole, and the contact condition changes according to the level of load applied through the wedge. In order to analyze detailed behavior, nonlinear material model and contact element were used in analysis. It was found from the analysis that the behavior of anchor head is affected by the interaction with the wedge contacted so that the wedge in FE model should have the same figure as the actual object. Circular array of wedge hole presents better stress distribution than layer array even though the small difference in maximum deformation. Increment of thickness of anchor head and distance of wedge hole also improve the performance of anchor head.
Analysis for Torsion of Hollow Beam by Least Squares and Boundary Elements Method
Kim, Chi-Kyung ; Bae, Joon-Tai ;
Journal of the Computational Structural Engineering Institute of Korea, volume 25, issue 2, 2012, Pages 175~182
DOI : 10.7734/COSEIK.2012.25.2.175
In this paper we are concerned with the performance of structural stability of torsion in square cross section of a beam with holes. The critical load is defined as the smallest load at which the equilibrium of the structure fails to be stable as the load is slowly increased from zero. The beams subjected to torsion are frequently encountered in general structures and these forces influence to the stability of structure. The boundary element method is found to be very efficient and accurate for the analysis of torsion problems including complex boundary conditions with respect to its simplicity and generality. In this paper, it is required to derive the boundary element formulation for torsion problem and integrate directly on the discrete boundary. To investigate the validity of the developed computer program, three distinctly solid cross-sections which are elliptical, rectangular and triangular one are analyzed, and comparisons are made with analytical approaches where these can also be used.