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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 10, Issue 4 - Dec 1998
Volume 10, Issue 3 - Sep 1998
Volume 10, Issue 2 - Jun 1998
Volume 10, Issue 1 - Mar 1998
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Axial Compressive Strength of Rectangular Hollow Section Members
Jo, Jae Byung ; Lim, Jeong Soon ; Han, Choong Seong ;
Journal of Korean Society of Steel Construction, volume 10, issue 2, 1998, Pages 153~160
The sectional dimensions and initial crookedness of the RHS(rectangular hollow section,
) were measured. The axial compressive strength tests for columns with slenderness
were performed as well as stub tests and tensile tests. FEM analysis was also used. The measurement shows that the errors of sectional dimensions are negligible. For the column length corresponding to
, the initial crookedness with the 2.5% probability estimated from the measured results is 1/490, 1/1121 1/1395 for each section respectively. The yield strengths obtained from tensile test are higher than the specified minimum value by more than 30%. The column test shows that the maximum axial resistances are almost same as, or a little higher than the FEM results and the specified strength curves of AISC Specification and Eurocode, when the maximum strengths from the stub tests are used as the yield strength of the steel. But the test results show much higher column strength than those specified in the Standard and Code, when the specified minimum yield strength of the steel is used.
Behavior of Concrete-Filled Square Steel Tubular Column-H Beam Connections with Plates
Yoo, Yeong Chan ; Shin, Kyung Jae ; Oh, Young Suk ; Moon, Tae Sup ;
Journal of Korean Society of Steel Construction, volume 10, issue 2, 1998, Pages 161~175
The objective of this study is to investigate the structural behavior of Concrete-Filled Steel Tubular Column-H Beam connections with plate stiffeners. The first, we made experiment on the Column to H-beam flange connections stiffened with simple tensile loading. The paramaters of tensile experiment are the area of each plates. The simple tensile experiment is conducted to 5 kinds of specimens. Eestimating the load, displacement, and strain from each kind, we compared them with results of second experiment. The second, we made experiment on the Column to H-beam connections stiffened with the sames under monotonic and cyclic load. we made specimens of 5 for the second experiment. In analysis, comparing each strengthes and stiffnesses we estimated deformation capacity. Comparing and estimating each yielding strength ratios and maxium-strength ratios on the basis of Yield line theory, we suggested new Strength Formula of Beam-to-Column Connections.
A study on the Properties for Structural Behavior of High-Performance Concrete Filled Square Steel Tube Columns -The Behavior Properties by Loading Conditions-
Park, Jung Min ; Lee, Sung Jo ; Kim, Wha Jung ;
Journal of Korean Society of Steel Construction, volume 10, issue 2, 1998, Pages 177~186
The concrete filled steel tubular column have to superior in compressive load carrying capacity, compared with same section typed hollow steel tube column, and have many excellent structural properties, such as stiffness improvement by filled concrete, improvement of ductility by reinforced effect of local buckling, and the like. However, it has not clear the effect of interaction between steel tube and filled concrete, stress portion ratio and fracture mechanism of concrete. This study investigated to structural properties for high strength concrete filled steel tube column by loading conditions through a series of experiments. Especially, this study investigated the properties of structural behaviors for concrete filled steel tube column stress ratio by loading conditions and failure mechanism of filled concrete.
The Dynamic Effect of Highspeed Trains on Railway Bridges
Yu, Chul Soo ; Kang, Young Jong ; Kim, Jong Heun ; Kweon, Jae Hyun ;
Journal of Korean Society of Steel Construction, volume 10, issue 2, 1998, Pages 187~199
The highspeed railway bridge which support continuous and high moving mass evalute the dynamic state and make the displacement of the bridge makes more or less, but up to this time the bridges are designed by the static design concept. for example when we design bridge we use impact factor, which only times the static load makes dynamic load. But becouse it simples. it can't express all of the effects. And so, in this report we study the modeling method of the moving mass and the dynamic factor.
Critical Buckling Temperatures of Anisotropic Laminated Composite Plates considering a Higher-order Shear Deformation
Han, Seong Cheon ; Yoon, Seok Ho ; Chang, Suk Yoon ;
Journal of Korean Society of Steel Construction, volume 10, issue 2, 1998, Pages 201~209
The presence of elevated temperature can alter significantly the structural response of fibre-reinforced laminated composites. A thermal environment causes degradation in both strength and constitutive properties, particularly in the case of fibre-reinforced polymeric composites. Furthermore, associated thermal expansion, either alone or in combination with mechanically induced deformation, can result in buckling, large deflections, and excessively high stress levels. Consequently, it is often imperative to consider environmental effects in the analysis and design of laminated systems. Exact analytical solutions of higher-order shear deformation theory is developed to study the thermal buckling of cross-ply and antisymmetric angle-ply rectangular plates. The buckling behavior of moderately thick cross-ply and antisymmetric angle-ply laminates that are simply supported and subject to a uniform temperature rise is analyzed. Numerical results are presented for fiber-reinforced laminates and show the effects of ply orientation, number of layers, plate thickness, and aspects ratio on the critical buckling temperature and compared with those obtained using the classical and first-order shear deformation theory.
An experimental study on the Behaviour of Concrete-Filled Square Steel Tubular Column·H-Beam End-plate Connections with Penetrated HT-Bolts
Kim, Jae Keon ; Lee, Myong Jae ; Lee, Seung Joon ; Moon, Tae Sup ;
Journal of Korean Society of Steel Construction, volume 10, issue 2, 1998, Pages 211~219
The objective of this study is to investigate the structural behavior of Concrete-Filled Tubular Column H-Beam End-Plate Connections with Penetrated HT-Bolts under monotonic load. Simple bending tests are carried out with 5 kinds of specimens including beam specimen. The parameters of these tests are the thickness (T=22, 26. 30mm) of End-plates and the diameter (M=20, 22mm) of bolts. From the tests, the increasing values of yielding strength and initial stiffness of each specimen were gained as the thickness of End-plates and diameter of bolts are increasing. And the application of Bjorhovde et al and Eurocode 3 classification method by non-dimensional moment-rotation curves to the connections showed that all of them are included in rigid region as far as initial stiffness is concerned and all of them are also rigid as far as ultimate strength.
A Study on the Fatigue Line with Plastic Rotaional Angle for Steel Structure of the Beam-to-Column Joints
Kong, Byung Seung ;
Journal of Korean Society of Steel Construction, volume 10, issue 2, 1998, Pages 221~232
This study presents a fatigue line with a plastic rotational angle to a great extent of plastic strain of Low-Cycle-Fatigue period, such as earthquake, etc. This fatigue line with a plastic rotational angle is measured and analysed more simply in practice rather than Woehler's fatigue line which is developed in stress variation of the structure. It shows that the slope of fatigue line with a plastic rotational angle is equal to that with plastic strain through the experiments by proving the correlation that the plastic strain ratio is directly proportional to the plastic rotational angle in plastic hinge. The theory is induced by Manson and Coffin strain fatigue line, and the experiments are tested by ECCS. The location of the plastic hinge is achieved and accurate plastic strain ratio is calculated through FEM.
Behavior of Composite Steel Bridges According to the Concrete Slab Casting Sequences
Kwak, Hyo Gyoung ; Seo, Young Jae ; Jung, Chan Mook ; Park, Young Ha ;
Journal of Korean Society of Steel Construction, volume 10, issue 2, 1998, Pages 233~251
This paper deals with the prediction of behavior of composite girder bridges according to the placing sequences of concrete deck. Based on a degenerate kernel of compliance function in the form of Dirichlet series, the time-dependent behaviors of bridges are simulated, and the layer approach is adopted to determine the equilibrium condition in a section. The variation of bending moments along the bridge length caused by the slab casting sequence is reviewed and correlation studies between section types and placing sequences are conducted with the objective to establish the validity of the continuous placing of concrete deck on the closed steel box-girder which is broadly used in practice.
Stability of Moment Resisting Steel Frames with Weak Beams
Shin, Yong Woo ; Kim, Hee Dong ; Lee, Myung Jae ;
Journal of Korean Society of Steel Construction, volume 10, issue 2, 1998, Pages 253~261
The buckling length of exterior beam-columns of the first floor in moment resisting steel frames with weak beams is uncertain when plastic hinges occur at the ends of weak beams due to seismic loads. The objective of this study is to investigate the buckling strength of concrete-filled tubular beam-columns and to suggest the reduced buckling length of them to apply to the beam-column design code. The exterior beam-columns are modelized with horizontal displacement restraint springs. Their strength and reduced buckling length are evaluated by numerical analysis.
Estimation of Slab Response of Plate Girder Bridge in Traffic-Induced Vibration by Three-Dimensional Analysis
Kim, Chul Woo ; Kawatani, Mitsuo ; Lee, Woo Hyun ;
Journal of Korean Society of Steel Construction, volume 10, issue 2, 1998, Pages 263~277
Recently, it is frequently reported that fatigue damages of deck slabs and floor systems of highway bridges occur under the conditions of increasing weight and traffic of heavy vehicles. These troubles are affected by dynamic wheel load of heavy vehicles running on roadway surface roughness with bump at expansion joint. It is required that this kind of traffic-induced vibration of highway bridges must be analyzed by using three-dimensional models of bridge and vehicle. In this study, the three-dimensional dynamic analysis is carried out, and dynamic responses of deck slab and wheel loads of moving vehicle are estimated according to different vehicle speeds and bump heights. Analytical responses of bridge deck slab are compared with experimental ones which were measured at Umeda entrance bridge of Hanshin Expressway in Osaka.
Damage Identification in Truss Bridges using Damage Index Method
Lee, Bong Hak ; Kim, Jeong Tae ; Chang, Dong Il ;
Journal of Korean Society of Steel Construction, volume 10, issue 2, 1998, Pages 279~290
An existing Damage Index Method is verified to demonstrate its feasibility for detecting structural damage in truss bridges (1) for which modal parameters are available for a few modes of vibration and (2) for which baseline modal information is not available from its as-built state. The theory of approach to detect locations of damage and to identify baseline modal model is summarized on the basis of system identification theory and modal sensitivity theory. The feasibility of the Damage Index Method is demonstrated using a numerical example of a truss bridge with 11 subsystems of 211 members and for which only two modes of vibration were recorded for post-damaged state.
The Structural Behavior of CFCT Column to H-Beam Connections With Longitudinal Rib of Column at Joint
Kang, Hyun Sik ; Moon, Tae Sup ;
Journal of Korean Society of Steel Construction, volume 10, issue 2, 1998, Pages 291~301
This paper is a study on the structural behavior of CFCT(Concrete-Filled Circular Tubular) column to H-beam connections with longitudinal rib. The important parameters are being longitudinal rib or not. variable column thickness(5.8mm. 9.2mm. 12.0mm. 15.0mm) around the joint between CFCT and H-beam and the width of flange to diameter. Test results are summarized for the strength, initial stiffness, failure mode and energy absorption capacities of each specimen. These are compared with the theoretical results(Yield line theory, numerical analysis). Therefore, the purpose of this paper is to investigate the stiffness and the strength of connections to evaluate the structural behavior of the CFCT column to H-beam connections with longitudinal rib.
Experimental Study on Fatigue Crack in Welded Crane Runway Girders (2) -Repair methods of Fatigue Crack-
Kim, Jin-Ho ; Im, Sung-Woo ; Chang, In-Hwa ; Shiga, Atsumi ;
Journal of Korean Society of Steel Construction, volume 10, issue 2, 1998, Pages 303~315
Four types of repair procedures are applied to the fatigue cracked crane runway gilders, which are stop-holes as crack arrester stop-holes reinforced with high strength bolts, welding repair and reinforcement with high strength bolted splices. The fatgiue cracks are reinitiated at the region where stop-holes and weld repairments are applied, while none of the cracks are observed in the cases of stop-holes reinforcement and reinforcement with high strength bolted splices. When using stop-holes and hole-reinforcement all repaired regions show a same fatigue strength to the one before the repairments. The experiments also reveal that the proper weldment is an essential factor when applying the welding repairement as a properly welding produces the same level of fatigue strength after the repairement. When the situation permits to use reinforcement with high strength boilted splices, the experiments shows the repairment is the best possible method among the procedures available.
Nonlinear Transient Heat Transfer Analysis Based on LANCZOS Coordinates
Im, Chang Kyun ; Chang, Sung Pil ;
Journal of Korean Society of Steel Construction, volume 10, issue 2, 1998, Pages 317~326
This paper describes a reduced finite element formulation for nonlinear transient heat transfer analysis based on Lanczos Algorithm. In the proposed reduced formulation all material nonlinearities of irradiation boundary element are included using the pseudo force method and numerical time integration of the reduced formulation is conducted by Galerkin method. The results of numerical examples demonstrate the applicability and the accuracy of the proposed method for the nonlinear transient heat transfer analysis.