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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 23, Issue 6 - Dec 2011
Volume 23, Issue 5 - Oct 2011
Volume 23, Issue 4 - Aug 2011
Volume 23, Issue 3 - Jun 2011
Volume 23, Issue 2 - Apr 2011
Volume 23, Issue 1 - Feb 2011
Selecting the target year
A Study on the Simple Design Method of Semi-Rigid Connection with Angle in Steel Structure
Heo, Myong-Jae ; Kim, Hong-Geun ; Choi, Won-Gu ;
Journal of Korean Society of Steel Construction, volume 23, issue 3, 2011, Pages 261~273
Recently, the demands for steel frame are increasing because of the trend and due to the demand for bigger and higher buildings. In the analysis of typical steel frame, connections are based on the idealized fixed or pinned connection. A fixed connection assumes that the relative angle of each member before deformation is the same after the transformation. Therefore, the stiffener reinforces the connection to sufficient rigidity and stability of the panel zone. In the economical aspect, however, the necessity of connection that the stiffener reinforcement has omitted is increasing due to the excessive production as well as labor costs of connection. In contrast, pinned connection is assumed that bending moments between the beams and columns do not transfer to each member. This is easy to make in the plant and the construction is simple. However, the structural efficiency is reduced in pinned connection because connection cannot transfer moments. The introduction of this semirigid process can decide efficient cross-sectional dimensions that promote ease in the course of structural erection, as performed by members in the field-a call for safety in the entire frame. Therefore, foreign countries exert efforts to study the practical behavior and the results are applied to criterion. This paper analyzes the semirigid connection of domestic steel by design specifications of AISC/LRFD and make data bank that pertain to each steel. After wards, the results are compared to those of idealized connection; at the same time, this paper presents a design method that matches economic efficiency, end-fixity, and rotational stiffness.
An Experimental Evaluation of Bending and Shear Resisting Strengths for Wire-Integrated Deck Plate System using Lightweight Concrete
Lee, Seong-Hui ; Bang, Jung-Seok ; Won, Yong-An ; Ryoo, Jae-Yong ; Choi, Sung-Mo ;
Journal of Korean Society of Steel Construction, volume 23, issue 3, 2011, Pages 275~282
A recent development of seismic design, which is required among environmentally friendly members, increased the concern on light-weight concrete. Extending around the building, the structural design which is applied for light-weight concrete has been increased. This study therefore evaluates the bending resistance and the shear resistance involved using four specimens that were manufactured and tested. The parameters used in this study exist. This study investigates the structural performance of composite slab using light-weight concrete with KCI (2007).
Characteristics on the Temperature Distribution in Steel Girder Bridge by using Gauge Measurement
Lee, Seong-Haeng ; Cheung, Jin-Hwan ; Kim, Kyoung-Nam ; Hahm, Hyung-Gil ; Jung, Kyoung-Sup ;
Journal of Korean Society of Steel Construction, volume 23, issue 3, 2011, Pages 283~294
The variation of temperature in the steel girder bridge by air temperature is measured. A correlation between the daily temperature range, the maximum and minimum temperatures of the day, and the temperature of the bridge are analyzed. With the statistical data from the Korea Meteorological Administration, the temperature correlations analyzed in this study is able to predict temperature variations between the upper flange and the lower flange which calculates the realistic displacement values of a movable support and an expansion joint in design.
Development and Performance Evaluation of the Fourth Generation H-section Beam-to-Column Weak Axis Connection for Improving Workability
Kim, Pil-Jung ; Boo, Yoon-Seob ; Yang, Jae-Guen ; Lee, Eun-Taik ; Kim, Sang-Seup ;
Journal of Korean Society of Steel Construction, volume 23, issue 3, 2011, Pages 295~304
Bracket-type connection is often used for the weak-axis steel connection. In general, a beam-to-column connection for the bracket type is fabricated at the shop and abeam splice is additionally attached to the bracket in the site. Therefore, steel construction would not be competitive due to the increase of beam splice fabrication cost and overall construction period. This paper now proposes the new weak-axis connection types without a scallop, which has more definite strength flow, simple connection details, and better workability. From the series of experiments, the proposed connections showed better strength and ductility in comparison with standard details with scallop because the thickness of the welding plate for wide-flanged, beam-to-column connection can be easily adjusted.
FEA of Beam-Column Connection with Bolted Web
Shin, Kyung-Jae ; Lim, Bo-Hyuk ; Lee, Swoo-Heon ; Choi, Sung-Mo ;
Journal of Korean Society of Steel Construction, volume 23, issue 3, 2011, Pages 305~316
As the building structures are higher and bigger, the high-performance steels of high strength, toughness, and low yield ratio had been required and developed. In this paper the behavior of the moment connection with bolted web and high strength steel was studied by using the finite-element analysis computer program of ABAQUS. The analysis model is based on the test results and the same cyclic load history was applied at the FE(Finite Element) model until it failed in the test. Through the FEA, several indicators hardly measured from the test were acquired. These indicators related to stress and strain were selected from three plastic rotation stages: 0.003 rad, 0.03 rad, and final failure rotation. Specifically, at the final failure stage, the strain indicators producing the full plastic behavior were suggested as a mechanical property for steel.
Flexural Behavior of Concrete Filled Seismic Resistant Steel Tubular Columns Subjected to Axial and Cyclic Lateral Load
Kim, Byung-Ho ; Shim, Hyun-Ju ; Choi, Byong-Jeong ; Lee, Eun-Taik ;
Journal of Korean Society of Steel Construction, volume 23, issue 3, 2011, Pages 317~326
Today there is a growing range of applications for Concrete-Filled Steel Tube (CFT) member because of its superior performance. Ductility estimation test of concrete-filled seismic resistant steel tubular columns, subjected to axial and cyclic lateral load, was carried out in this study. Seismic resistant steel tubes are manufactured using SN400B plates by a two-seam welding at center of the column width for cold press-formed shape plates of two pieces. A total of eight specimens were manufactured and tested with the parameters of width-thickness ratio of steel tubular column, axial load ratio, and loading conditions to act axial and cyclic lateral load two dynamic actuators were used. From test results, flexural strength, deformation capacity, energy dissipation capacity, and ductility behavior of columns were analyzed.
Degradation Characteristics of Symmetric Unbraced Steel Frames According to Variations of Member Stiffness and Axial ratio
Lee, Myung-Jae ; Kim, Hee-Dong ; Lim, Yoo-Ha ;
Journal of Korean Society of Steel Construction, volume 23, issue 3, 2011, Pages 327~335
This study has two objectives: (1) to evaluate the degradation characteristics of symmetric unbraced steel frames by using analytical approach, and (2) to suggest equation which can approximately estimate the effect of degradation during the schematic design stage. For the analytical approach, the refined plastic hinge method with an arc length algorithm was adopted. The subject of analysis was one story one-bay, multistory one-bay, and multistory three-bay unbraced steel frames. The main parameters of the analytical approach include the stiffness ratio of column to beam and the axial force ratio. The study led to the following conclusions. The normalized stiffness of degradations is affected by both stiffness ratio of column to beam and the axial load ratio; however, the major influence on degradations is the axial force ratio. The equation, which can approximately estimate the effect of degradation, was suggested together with the research results.
Cyclic Seismic Testing of Concrete-filled U-shaped Steel Beam-to-Steel Column Connections
Park, Hong-Gun ; Lee, Cheol-Ho ; Park, Chang-Hee ; Hwang, Hyeon-Jong ; Lee, Chang-Nam ; Kim, Hyoung-Seop ; Kim, Sung-Bae ;
Journal of Korean Society of Steel Construction, volume 23, issue 3, 2011, Pages 337~347
In this study, seismic resistance of concrete encased U-shaped steel beam-to-steel H-shaped column connections was evaluated. Three specimens of the beam-to-column connection were tested under cyclic loading. The composite beam was integrated with concrete slab using studs. Re-bars for negative moment were placed in the slab. The primary test parameter was the details of the connections, which are strengthening and weakening strategies for the beam end and the degree of composite action. The depth of the composite beams was 600mm including the slab thickness. The steel beam and the re-bars in the slab were weld-connected to the steel column. For the strengthening strategy, cover plates were weld-connected to the bottom and top flanges of the steel beam. For the weakening strategy, a void using styrofoam box was located inside the core concrete at the potential plastic hinge zone. The test results showed that the fully composite specimens exhibited good strength, deformation, and energy dissipation capacities. The deformation capacity of the beam exceeded 4% rotation angle, which is the requirement for the Special Moment Frame.
A Development of a Shape Optimization Design Techniques for the Diagrid Tapered Tall-Building
Han, Sang-Eul ; Lee, Han-Joo ; Ryu, Jong-Hye ; Jeong, So-Young ;
Journal of Korean Society of Steel Construction, volume 23, issue 3, 2011, Pages 349~356
In this paper, the optimal diagrid angle of atypical tall buildings has been found using diagrid optimization technique which is based on parametric algorithm. A diagrid is a diagonal grid which can be seen among atypical tall buildings and structures which effectively resist horizontal and vertical direction loads. Therefore, it is also the objective of this studyto find the maximum stiffness of atypical tall buildings by optimizing diagrid angle. Moreover, this study touches on both cylindrical and tapered off cylindrical structures, as shown in the examples to check the compatibility of optimum diagrid angle, which effectively resists horizontal deformation on top by optimization algorithm.
Experimental Study on Structural Behavior of Tapered Member with Non-compact Flange and Web
Chung, Kyung-Soo ; Jeon, Bae-Ho ; Park, Man-Woo ; Do, Byung-Ho ;
Journal of Korean Society of Steel Construction, volume 23, issue 3, 2011, Pages 357~365
The current trends in steel construction intend to use tapered sections to minimize as much as possible the use of excess material. This can be done by choosing the cross-sections to be as economical as possible, leaving the classical approach of using prismatic members. In addition, it is important to predict the buckling behavior of tapered member with large depth-to-thickness ratio in order to prevent the collapse of PEB system subjected to overloads. An experimental investigation of buckling behavior of tapered beam was presented. The primary test parameter was depth-to-thickness ratio and taper ratio. Using initial stiffness and load-carrying capacity proposed by current provision, the simple plastic hinge method using modified Yoda's model and finite element analysis, the prediction of a moment-rotation curve of linearly tapered member was presented. Moreover, comparisons between analytical and experimental data for moment-rotation curves were accomplished.
Analysis of Bolted Joints for Plate Girder using Connector element
Hwang, Won-Sup ; Min, Seon-Young ; Kim, Hee-Ju ;
Journal of Korean Society of Steel Construction, volume 23, issue 3, 2011, Pages 367~375
In this study, structural behavior of bolted joints which were important elements in plate girder design was analyzed using commercial FE analysis program. Also, the numerical analysis method that simply showed behavior of bolts was proposed using the connector element of ABAQUS, nonlinear FE program. Numerical analysis was conducted to verify the proposed numerical analysis method on the basis of the experiment of previous study. In order to investigate effects of action force which was changed by locations of the bolted joints, the three different models were developed by the locations of the bolted joints and behavior for the each model was compared and analyzed by various design parameters (area of splice plates, stiffness of splice plates, and stiffness of bolts). The moment-displacement relations of structures for the various design parameters were investigated to analyze effects of each parameter in ultimate behavior of the structures. Also, the effects of each parameter were compared by force.
An Experimental Study on Structural Performance of HRC Composite Beam according to types of Connection Plate with Stud Bolts
Lee, Soo-Kueon ; Yang, Jae-Guen ; Song, Chang-Seok ; Jang, Eun-Young ; Moon, Jun-Chul ;
Journal of Korean Society of Steel Construction, volume 23, issue 3, 2011, Pages 377~384
Recently, for the purpose of reducing work terms and improving performance for construction work, various methods in structure field were developed. This included the HRC system which is applicable to a typical structure (e.g., parking and office building). The HRC system introduced the Gerber Joint to raise structural efficiency and used connection plate to bolt HRC composite beam to H beam in the construction field. In this research, the experimental tests for six specimens, which were in the same field conditions, were conducted with several parameters such as the length and height of the connection plate and the number of stub bolts. The test result was compared with those made by current design codes for the deflection and strains of the main bar. Within the given load, the integration of concrete in beam and connection plate, welded with stud bolts, was verified.
Flexural Strength of Composite HSB Hybrid Girders in Positive Moment
Cho, Eun-Young ; Shin, Dong-Ku ;
Journal of Korean Society of Steel Construction, volume 23, issue 3, 2011, Pages 385~395
The flexural strength of composite HSB hybrid I-girders under positive moment is investigated by the moment-curvature analysis method to evaluate the applicability of the current AASHTO LRFD design specification to such girders. The hybrid girders are assumed to have the top flange and the web fabricated from HSB600 steel and the bottom flange made of HSB800 steel. More than 6,200-composite I-girder sections that satisfy the section proportion limits of AASHTOL RFD specifications are generatedby the random sampling technique to consider a statistically meaningful wide range of section properties. The flexural capacities of the sections are calculated by the nonlinear moment-curvature analysis in which the HSB600 and HSB800 steels are modeled as an elastoplastic, strain-hardening material and the concrete as CEB-FIP model. The effects of ductility ratio and compressive strength of concrete slab on the flexural strength of composite hybrid girders make of HSB steels are analyzed. Numerical results indicated that the current AASHTO-LRFD equation can be used to calculate the flexural strength of composite hybrid girders fabricated from HSB steel.
A Study on the Dynamic Response of Highway Bridges by 4-Axles Single Truck
Chung, Tae-Ju ;
Journal of Korean Society of Steel Construction, volume 23, issue 3, 2011, Pages 397~404
In this paper, a research for the dynamic wheel loads of a 3D vehicle model, which relates to a tire-enveloping model, is carried out. A single truck with four axles is modeled as a 10-D.O.F. vehicle by modeling both contact length of tires and pitching of tandem spring axles. The dynamic equations of the vehicle are obtained using the Lagrange's equation, the solution of the equations is calculated by Newmark-
method. The validity of the developed 3D vehicle model is demonstrated by comparing results obtained from the proposed method with those from experimental data. The maximum impact factors of tire force are evaluated according to the various step bumps on which a 24-ton dump truck is running.