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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
Editor in Chief :
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
Selecting the target year
Development of Prestressed Steel Frame Overpass using Temporary Piers
Kong, Byung Seung ; Hwang, Won Sup ; Park, Young Je ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 565~575
This study presents overall process for designing and constructing a prestressed frame overpass using temporary piers. For the purpose of automating the design process, this study presents a computer program. According to the effective span(20m, 25m, 30m, 35m, 40m, 45m), this study performed parametric analysis and eventually presented appropriate cross section and compared this cross section with that of the existing simple steel overpass in girder height and quantify of the steel.
for gilder height and
for quantify of the steel are reduced as the result of study for span length
. As long as the span length. the reduction rate was large.
Vibration of Steel Composite Railway Bridges under High Speed Train
Chang, Sung Pil ; Kwark, Jong Won ; Ha, Sang Gil ; Kim, Sung Il ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 577~587
The influences of high speed train on the dynamic responses of steel composite railway bridges are investigated. The bridge system which has two I-girder and several cross beams is modeled with plate and frame elements. With assumption of concrete slabs are fully connected with steel girders, the offset between slabs and girders is modeled using constraint equation. The track system is modeled using beams on elastic foundation theory. And, the TGV train model is developed in 2-dimension considering bouncing and pitching motion. And braking action of vehicle is considered using speed dependent braking function. To investigate the behavior of bridges due to moving trains, parametric studies on the variation of natural frequency of bridge, speed parameter, vehicle modeling method, braking action of train, etc are performed.
Axial Fatigue Behavior of Structural Cables
Suh, Jeong In ; Chang, Sung Pil ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 589~600
This study was planned to verify the usefulness of Latin square design method in fatigue tests of cables and to see the axial fatigue behavior of wire ropes being used as hangers in suspension bridges. Three parameters : mean stress, stress range. and specimen length, were adopted for verification. The effects of these parameters are in argument except for stress range. Three classes in each parameter were used. Triple replication was performed in each cell to increase the number of replication (or degree of freedoms). The major cause of fatigue failure was fretting fatigue at trellis contact point. Three chosen parameters were proved to be significant. It was verified that the effect of stress range was in agreement with expectation, but the effect of specimen length was contrary to the expectation. It was also observed that the effect of mean stress depended upon the chosen level. Therefore Latin square design method is effective for verifying the parameters that affect fatigue behaviour under orthogonality conditions.
Influence of Boundary Stress Singularities on the Vibration of Clamped and Simply Supported Sectorial Plates With Various Radial Edge Conditions
Kim, Joo-Woo ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 601~613
This paper reports the first-of-its-kind free vibration solutions for sectorial plates having re-entrant corners causing stress singularities when the circular edge is either clamped or simply supported. The Ritz method is employed with two sets of admissible functions assumed for the transverse vibratory displacements. Accurate frequencies and normalized contours of the transverse vibratory displacement are presented for the spectra of sector angles.
A Comparative Study on Influence Line of Curved I-Girder Grid Bridge with Constant Cross Section and Variable Cross Section
Chang, Byung Soon ; Seo, Sang Geun ; Ryoo, Eun Yeol ; Yun, Jeung Seup ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 615~627
In order to determine the maximum shear force, the maximum bending moment, the maximum pure torsion. the maximum warping torsion, and the maximum bimoment for the curved girder grid bridges, it is important to find the location of live load applied to the curved girder grid bridges, so that the influence line can be estimated. The fundamental differential equation concerning the behaviour with warping effects for the curved girder is developed by Vlasov. In this paper, the influence line of shear force, bending moment, pure torsion, warping torsion, and bimoment due to unit vertical load and unit torsional moment for curved I-girder grid bridges with variable and constant cross section are obtained by using the finite difference method and compared with respectively.
Cyclic Seismic Testing of Full-Scale Column-Tree Type Steel Moment Connections
Lee, Cheol Ho ; Park, Jong Won ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 629~639
This paper summarizes the results of full-scale cyclic seismic performance tests on three column-tree type steel moment connections. Each test specimen consisted of a
beam and a
column of SS41 (SS400). Key parameter included was column PZ (panel zone) strength relative to beam strength. The seismic performance of specimen with stronger PZ tended to be inferior. Total plastic rotations available in the specimens ranged from 1.8 to 3.0 (% rad). The limited test results in this study seem to support the speculation that permitting PZ yielding shall be more beneficial to enhancing total plastic rotation capacity of the moment connection. Beam flange fracture across the heat affected zone and divot-type pullout of the column flange were observed in the tests. A conceptual mechanical model consistent with observed test results was also sought.
An Experimental Study on the Strength of the Frame consisting of Concrete Filled Steel Tubular Column-H Beam under Alternately Repeated Horizontal Loading
Lee, Seong Do ; Kim, Pil Jung ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 641~655
It researched several jointing-methods of frame consisting of a concrete-filled steel tubular column and H-shaped beam. These beam-to-column connections is parameters to following: columns of square shape pipe infilled with or without concrete, joints assembled two types of diaphragm, outside-type and through-type. And it is testing that cyclically lateral loadings used hydraulic ram. In testing. we'll be on purposed to estimate the hysteretic behavior, strength and stiffness, energy absorption capacity, deformation capacity and failure configuration of each specimen. It is concluded that the frame specimens with outside-type are more stable and exhibit more energy absorption capacity compared with the through-type, in column of filled with concrete.
A Study on the Optimization of Steel Structures Considering Displacement Constraints
Kim, Ho Soo ; Lee, Han Joo ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 657~666
This study presents an effective dual algorithm for the optimal design of steel structures with displacement constraints. The dual method can replace a primary optimization problem with a sequence of approximate explicit subproblems with a simple algebraic structure. Since being convex and separable, each subproblem can be solved efficiently by the dual method. Specifically, this study uses the principle of virtual work to obtain the displacement constraint equations with an explicit form and adds the linear regression equation expressing the relationships between the cross-section properties to the dual algorithm to reduce the number of design variables. Furthermore, this study deals with the discrete optimization problem to select members with the standard steel sections. Through numerical analyses, the proposed method will be compared with the conventional optimality criteria method.
Transient Analysis of Partially Supported Laminated Composite Plates With Cutouts
Lee, Won Hong ; Han, Sung Cheon ; Yoon, Seok Ho ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 667~676
The transient analysis of partially supported laminated plates with rectangular holes under uniformly distributed transverse load is studied using finite element method. The first-order shear deformation theory and the variational energy method are employed in mathematical formulation. The effects on central deflection by plate thickness ratio, material modulus ratio, ply lamination geometry and boundary conditions are investigated Numerical results are presented and comparisons of the results by the present method with those given in the literature are made.
An Evaluation of Axial Compressive Strength in Steel Stud
Shin, TaeSong ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 677~689
In relation to concentrically loaded compression, this research is to describe, analyze, and evaluate the design strength in steel stud. The similarity and difference among load and resistance factor design specification for cold-formed steel structural members (AISI), cold-formed thin gauge members and sheeting (EC3 part 1.3), and German draft (DASt-Richtlinie 016) are introduced, discussed, and systematically evaluated. Especially, the effective width and global instability problems (flexural buckling and torsional flexural buckling) are here implied in this research. The design axial strength by dual standards (AISI and EC3) is calculated and compared using the example.
Nonlinear Dynamic Characteristics of Antisymmetric Laminated Shells
Park, Sung Jin ; Mikami, Takashi ; Kim, Young Jin ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 691~700
Based on Von Karman-Donnell kinematic assumptions for laminated shells, the nonlinear vibration behaviour of antisymmetrically or asymmetrically laminated cross-ply circular cylindrical shells with clamped and simply-supported ends are studied by a multi-mode approach. A equation is formulated and satisfies the associated compatibility equation and all boundary conditions. The displacement function is assumed to take the form of the lowest linear vibration mode and to satisfy continuity of the circumferential displacement. The nonlinear vibration equation is derived by the Galerkin's method. And nonlinear frequency is obtained by using the harmonic balance method as a function of lamination parameters, material constants, aspect ratio and amplitude of vibration. The effect of initial imperfection is also included. Results of the non-linear vibration are presented for different amplitudes of initial imperfection and four sets of boundary conditions. Present results are compared well with existing analysis results.
Experimental Study on the Composite Beam Strengthened by External Post Tensioning
Kim, Gi Bong ; Chung, Young Soo ; Choi, Hyok Chu ; Kang, Bo Soon ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 701~708
The application of additional post-tensioning tendons has recently been widely considered and requires very little interference with the existing structure. Several bridges on the national roadway designed as the second class were strengthened by external post-tensioning for the capacity enhancement purpose, but much of that strengthening work was not verified analytically as well as experimentally. This paper examines experimentally the behavior of simple composite steel-concrete beams designed as the second class(DB-18) When they are strengthened with external post-tensioning tendon. Test results show that external post-tensioning increases the ultimate load and the magnitude of tendon force increases the yield load but not the ultimate load.
A Study on the Residual Stress in the Welded Joints with Different Details
Lim, Cheong Kweon ; Park, Moon Ho ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 709~720
In order to study the distribution of welding residual stress through the plate thickness. experiment and analysis of fillet welding details were carried out. Especially, a residual stress in the weld root part of T-joint fillet weld whose measurement was difficult up to now was measured. By using the heat input and the number of the weld layers as parameters, the distribution of the 3-dimensional residual stress was investigated. As a result, we can say that with increasing the heat input, the residual stress in the weld toe and weld root barely changes. But, the area of the tensile residual stress became wide. Then, comparing a single pass with multi-pass weld method, it was found that the residual stress decreased more in multi-pass than in single pass. Moreover, it was found the thing that the area of tensile residual stress by multi-pass is lower than that by single-pass in the near weld part.
An Experimental Study on the Block Shear Rupture of Angle Tension Members
Kim, Bo Young ; Lee, Kyu Kwong ; Choi, Mun Sik ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 721~730
In this paper, an experimental study have been many studies on the joints of steel structure, for it has great influences on the safety of structures. Research on block shear rupture of the joint receiving pure tension have been done in foreign countries, but not in Korea. This study focuses on the propriety of block shear design code, according to limited state design criteria of steel structures recently established in Korea, by an experiment on the joint of angle tension members. The methods of this study were to compare other study results on block shear rupture mode and ultimate capacity, and to evaluate the propriety of the criteria design code. The result is that tension yield shear ruptures and shear yield tension ruptures happened at the joint, and the experimental rupture load was 15% higher than the capacity entered in the criteria design code. We conclude that it is necessary to revaluate the block shear design code presented by many studies on the limited state design criteria of steel structures.
Buckling Strength of Orthogonally Stiffened Steel Plates under Uniaxial Compression
Choi, Dong Ho ; Chang, Dong Il ; Choi, Hang Yong ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 731~740
Orthogonally stiffened steel plates are used for orthotropic steel decks of long-span bridges because of high degree of flexural and torsional resistances and good load-distribution behavior. An analytic study is presented for evaluating the buckling strength of orthogonally stiffened plates subjected to uniaxial compression. By using the plate theory, the buckling stress under overall and partial buckling modes, is derived. Parametric studies are performed to show the effects of the stiffness and the number of transverse and longitudinal ribs on the buckling strength. The results show quantitatively strong influence of stiffness and spacing of longitudinal and transverse ribs.
Behavior of Beam-to-Concrete Filled Steel Tube Column Rigid Connections
Kim, Cheol Hwan ; Lee, Eun Taik ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 741~748
Experimental studies were carried out with test parameters: diaphragm yield type and beam yield type, the opening hole size of inner steel diaphragm, and the existence of slab in order to understand the behavior of beam-to-concrete filled steel tube column rigid connections under cyclic loading condition. Test results show that the connections have good rotational capacity when the beam yields first and the joints should be designed such that the beam yields prior to the inner diaphragms.
Shear Stiffness of Shear connections in Full-Depth Precast Concrete Deck Bridge
Shim, Chang Su ; Chung, Chul Hun ; Kim, Chul Young ; Chang, Sung Pil ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 749~758
The evaluation of shear stiffness of shear connection in composite bridges with CIP concrete deck is analysed. Shear stiffness of shear connection in full-depth precast concrete deck bridges is obtained from experiments. 3-dimensional finite element analyses of push-out specimen are carried out to investigate the effects of characteristics of filling material strength in shear connection on shear stiffness and local stress distribution. The load-slip relations obtained from the analyses are compared with those of experiments. The equation of initial shear stiffness of shear connection in precast concrete deck bridge is proposed. Linear analyses are performed to evaluate the effects of the shank diameter of shear connector and the strength of mortar on the characteristics of deterioration and failure load obtained by the failure criterions of each material. The failure loads are estimated and compared with test results.
Design of Shear connection in Full-Depth Precast Concrete Deck Bridge
Chang, Sung Pil ; Shim, Chang Su ; Kim, Jong Hee ; Kim, Young Jin ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 759~767
Full-depth precast concrete deck bridge has shear pockets for shear connectors that give composite action with steel girder. Strength and shear stiffness of shear connection that is needed to design shear connectors in case that shear pockets are filled with nonshrink mortar are investigated. In case that simple span full-depth precast concrete deck bridge is designed by allowable stress design, distribution of shear connector is suggested and details of precast panel that is placed on the support are proposed. Appropriate distribution of shear connectors in strength design and fatigue design is investigated through parameter analyses using partial interaction theory. The effects of nonshrink mortar strength is studied using the results of experiments and analyses and adequate strength is proposed.
The Effects of the Geometrically Initial Imperfection on Buckling Characteristics of pin-Jointed Single-Layer Lattice Domes
Jung, Hwan Mok ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 769~777
That main purpose of this paper is to clarify the effects of geometrically initial imperfection on the buckling characteristics of the pin-jointed single-layer lattice domes with triangular network. Additionally, this study is to get the data that is to formulate the general buckling-strength equation taking geometrically initial imperfection into consideration. Analysis is undertaken by using the frame analysis method which is based on the finite element method dealing with geometrically nonlinear problem.
The Fatigue Strength of Steel Bridge Components Attached with Non-load Carrying Out-of Plane Gusset Plate
Woo, Sang Ik ; Jung, Kyoung Sup ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 779~788
This paper presents the results of the experimental and analytical investigation for the fatigue strength of welded details frequently used in steel bridges, especially for the details with relatively lower fatigue strength. Considering the measured stress fatigue cracking initiated at toe of the transverse fillet weld joining the gusset plates to the web because of the stress concentration that developed as a result of the geometric conditions and the greater probability of microscopic discontinuities at the fillet weld toe A comparison was made of the stress calculated by considering geometric aspect of bead and measured at same position. They indicate that the geometric conditions of the weld toe result in similar stress concentration on both FEM models and test results. The test results were compared with the fatigue criteria of AASHTO, JSSC specifications. Specimens of 80 and 150mm gusset plate configuration tested either respectively equaled or exceeded the fatigue resistance provided by category D and E of the AASHTO specification. It also satisfied the category F and G of JSSC. Both WG1 and WG3 specimen tend to provide S-N curves with a store near -0.3 less than AASHTO and JSSC.
An Experimental study on the Bolted Moment Connection between H-Beam and CFT Column
Park, Soon Kyu ; Roh, Hawn Kewn ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 789~799
The purpose of this study is to propose the prototypes of bolted end plate moment connection between CFT column and H-beam sections. Nine different types of bolt are designed in this study. The shapes of those bolt are straight. bent, hooked or stud-type. The end plate moment connection between CFT column and H-beam sections which are jointed by those bolts are studied experimentally to compare their performances. The simple beam bending tests are carried out to investigate the structural behavior of beam-to-column connections. The experimental results show that some of the bolted end plate connection types have quite good performance in the structural behavior but still have a lot of week points to be solved for the efficiency of construction.
An Experimental Study on Wind Aerodynamic Improvement of Steel Composite Cable Stayed Bridge having π-shaped Girder
Chang, Dong Il ; Min, In Ki ;
Journal of Korean Society of Steel Construction, volume 10, issue 4, 1998, Pages 801~811
In this paper, aerodynamic properties and improvements of the
stiffening girder is studied by wind tunnel tests in steel composite cable stayed bridge. As an improvement device, fairing, extension, post and flap is tested. and the best improved section is selected and estimated on angles of attack, damping ratios and turbulent flows. It is shown that the selected fairing is effective to improve the aerodynamic stability. And this study can be utilized as a database of wind-resistant methodology of steel composite cable stayed bridge.