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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 11, Issue 6 - Dec 1999
Volume 11, Issue 5 - Oct 1999
Volume 11, Issue 4 - Aug 1999
Volume 11, Issue 3 - Jun 1999
Volume 11, Issue 2 - Apr 1999
Volume 11, Issue 1 - Feb 1999
Selecting the target year
A Comparison Study on Load Distribution Behavior of Steel Box Girder Bridge
Na, Joon-Ho ; Jung, Kwang-Mo ; Kim, Moon-Young ;
Journal of Korean Society of Steel Construction, volume 11, issue 5, 1999, Pages 435~435
To design steel box-girder bridge, designers have taken the classical load distribution coefficient methods. Due to the rapidly developing computer technique. steel box girder bridges can be modeled by using the grillage method for analyzing the girder, or the cruciform space frame method and FEM for more accurate and detailed analysis. In this study, in order to investigate load distirbution characteristics for the steel box-girder bridge, the 0-1 method, the grillage method, the cruciform space frame method, and the FEM using the shell element are applied to the steel bridge analysis subjected to the unit torsional moment, dead loads, and DB-24 wheel loads, respectively, and their merits and demerits are analyzed.
An Evaluation of Flexural Strength for cold-formed Steel Beams
Shin, Tae-Song ;
Journal of Korean Society of Steel Construction, volume 11, issue 5, 1999, Pages 445~445
The Purpose of this paper is to evaluate the design strength for bending of thin-walled cold-formed flexural members. It is compared and systematically analyzed the similarities and difference of design method between AISI specification and Eurocode 3 part 1.3 for thin-walled cold-formed steel design. It is here presented as follows: First, the effective area of thin-walled section is calculated in consideration of post-buckling reserve capacities of thin plate. The plate buckling coefficient and the effective width of web are investigated particularly due to stress gradient in the web. Second, the failure mode of flexural members subjected to moment is divided into two. One is on the basis of initiation of yielding in the effective section and the other is a failure caused by the lateral buckling. The design strength subjected to bending for thin-walled cold-formed lipped channel steel beam is calculated as an practical example according to AISI and EC3 standards. Especially the lateral buckling strength is also investigated additionally by DIN 18800 part 2. The design strength for lateral buckling by AISI specification and DIN is very good agreed with, but the result according to EC3 is conservative compared to the other two standards.
Analysis of Anisotropic Hybrid Elastic Bodies under In-plane Loading
Paik, Han-Sol ; Lee, Sang-Youl ; Chang, Suk-Yoon ;
Journal of Korean Society of Steel Construction, volume 11, issue 5, 1999, Pages 455~455
Recently, Hybrid elastic bodies are used increasingly as civil engineering materials. Because of their superiority in strength, corrosion resistance, and weight reduction, they are used extensively as structural members. The mechanical property of hybrid elastic bodies are determined by arrangement of materials. This study analyzed behaviors of hybrid elastic bodies which connect two different anisotropic materials in the same plane under in-plane loading using numerical approximation method, finite difference method. The object of this study analyzed behaviors of hybrid elastic body with different anisotropic materials and compared to the behaviors of elastic bodies with same materials. The analysis results of behaviors hybrid elastic bodies with different anisotropic materials will be used to analyze structural behaviors of many other structures with different material.
Parametric Study on Natural Frequency of Composite Deck Plate Slab
Kim, Hee-Cheul ; Kim, Woo-Young ; Eom, Chul-Hwan ;
Journal of Korean Society of Steel Construction, volume 11, issue 5, 1999, Pages 467~467
One of the problems occurring at the metal deck floor system is the vibration induced by human movement. According to the "Proposal for the design code and commentary of a composite deck floor system" published by the Architectural Institute of Korea. the only specification for the vibration control is the limitation of the natural frequency obtained from static deflection. However the actual vibration characteristics of the composite slab system is different if the vibration of a system is limited by natural frequency obtained from its static deflection. The parameters affecting the natural frequency of a composite deck plate floor system are edge conditions, stiffness and length of the beam, strength and thickness of a topping concrete. and thickness and width of a deck plate. The variation of natural frequency was observed on this paper due to the different parameter conditions. The results obtained from this study will be very helpful in providing the appropriate serviceability for the different usage of a deck floor system.
Estimation of Remaining Fatigue Life for Large Scaled Butt Welded Members of H-Beam with Penetration Defects
Han, Seung-Ho ; Shin, Byung-Chun ; Han, Jeong-Woo ;
Journal of Korean Society of Steel Construction, volume 11, issue 5, 1999, Pages 477~477
In this paper, the remaining fatigue life of butt welded steel bridge members with penetration defects was estimated by using S-N and fracture mechanical concept considering real failure process. S-N curves for butt welded specimen with various penetration defect ratios, D/t, were derived and its fatigue crack propagation behaviors were interpreted through considering 3-dimensional semi-elliptical crack shape, so that the assessment of the remaining fatigue life of butt welded members with penetration defects was possible. To ensure the application of the proposed procedure to real cases, fatigue tests of the large scaled H-beam specimens, in which the center of tension flange was butt welded with penetration defects, were performed and their fatigue lives were estimated theoretically by the proposed procedure according to the step-by-step fatigue failure processes, eg. 3-D internal crack penetration inside tension flange, through crack growth on tension flange and crack propagation along web. The obtained results by using the proposed procedure were well agreed with the experimental results.
Analysis on Structure Behavior of Composite I-Girder Bridge according to Transverse Direction Stiffness of Slab
Park, Young-Hoon ; Lee, Seung-Yong ; Cho, Kwang-Hyoun ; Chang, Dong-Il ;
Journal of Korean Society of Steel Construction, volume 11, issue 5, 1999, Pages 487~487
Increase of stiffness ratio(longitudinal direction stiffness/transverse direction stiffness) cause decrease of live load transverse distribution efficiency. In this study, to evaluate the stiffness ratio effect according to the degree of reflected transverse direction stiffness, two types analysis models are considered. First analysis model consider only cross beam as a transverse direction stiffness and second analysis model consider cross beam and slab as a transverse direction stiffness. From the analysis results, the higher effect of stiffness ratio is analyzed with a increase of reflected transverse direction stiffness. And, the difference of maximum live load distribution coefficient between two types analysis models was increased with decrease of stiffness ratio and increase of girder spacing.
Experimental Study on Ultimate Strength of Concrete Filled Steel Tubular Columns
Kim, Jin-Ho ; Jeon, Sang-Woo ;
Journal of Korean Society of Steel Construction, volume 11, issue 5, 1999, Pages 495~495
In this study, concentric compression tests were conducted for rectangular and circular section stub columns to estimate the ultimate strength of concrete filled steel tubular columns. The main variation of the tests was the width-thickness ratio of the section, and the ultimate value obtained through tests was compared with calculated strength by design code of other countries. From the result of comparison, it was found that the strength by design method of CHINA, AIJ, AISC-LRFD is underestimated to 90%, 70%, 60% for the test results.
Wheel Load Distribution Characteristics of Steel Plate Girder Bridge by Plane Grillage Analysis
Jung, Kwang-Mo ; Yun, Hee-Taek ; Kim, Moon-Young ;
Journal of Korean Society of Steel Construction, volume 11, issue 5, 1999, Pages 507~507
The composite steel gilder bridge deck in real consists of the concrete slab, the main girder, the floor beam, and shear connectors so that it is very difficult to develope the accurate 3-dimensional analysis model of the deck. Therefore, the practical approximation should be adopted to predict the consistent load distribution behaviors of the bridge deck In this study, the plane grillage method including the generation of the plane grillage mesh and the application technique of the wheel load is presented in order to investigate the load distribution characteristics of the composite steel girder bridge. In addition, the load distirbution effect according to variation of the torsional constant is analyzed and the load distribution coefficients considering characteristics of several parameters are presented.
The Measurement and Analysis of Natural Frequencies of a Composite Deck Plate Slab According to the Edge Conditions and the Size of a Slab
Kim, Hee-Cheul ; Kim, Woo-Young ; Eom, Chul-Hwan ;
Journal of Korean Society of Steel Construction, volume 11, issue 5, 1999, Pages 519~519
The necessity of multipurpose high rise building is increasing because of the high cost of real estate in the big cities. Most of the high rise building introduces steel structural system with metal deck floors and concrete topping. Since the mass of the metal deck floor system is relatively smaller than that of the concrete floor system and due to the larger span compared to other structural systems, it has a problem in vibration by annoying the user of a building. The dynamic characteristics of composite deck floor system of different boundary conditions were measured and the corresponding analytical derivation results were compared on his paper. Also variations of the natural frequency due to the continuity conditions and the size of a slab were observed.
Advanced Analysis of Steel Frame Accounting for Composite Beam Effects
Kim, Seung-Eock ; Kim, Yo-Suk ;
Journal of Korean Society of Steel Construction, volume 11, issue 5, 1999, Pages 529~529
In this paper, an advanced analysis method is developed accounting for composite beam effects. This analysis can consider material and geometric nonlinearities of structural system as well as composite beam effects. First, efficient ways of assessing steel frame behavior including nonlinear and inelastic effects are outlined. Plastic moment, modified yield stress and modified young's modulus of the composite beam are calculated by the AISC-LRFD specifications. The developed advanced analysis has been verified by comparison of theoretical solutions. A case study shows that the load carrying capacity of a composite beam is larger by about 20% than that of the bare steel beam. The proposed method is practical because it eliminates the separate member capacity check after analysis. The method is an advanced design technique since it can evaluate the strength of a structural system.
Optimization of Steel Box Girder Bridges Based on Efficient Reanalysis Technique
Cho, Hyo-Nam ; Chung, Jee-Seung ;
Journal of Korean Society of Steel Construction, volume 11, issue 5, 1999, Pages 539~539
In this study, a design synthesis algorithm is proposed for efficient optimum design of steel box gilder bridges. The proposed algorithm for optimization of steel box girder bridges is based on efficient stress reanalysis technique. Considering characteristics of steel box girder bridges, several other approximation techniques, such as artificial constraint deletion and variable linking, etc. are also introduced to increase the efficiency of optimization. The efficiency and robustness of the proposed algorithm including the proposed stress reanalysis technique is demonstrated by comparing it with a recent optimization algorithm including general stress reanalysis technique using a numerical example. In addition, a few of design examples are optimized to show the applicability of the new algorithm.