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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
Full Strength Capacity Connection Design for Medium-Low Rise Braced Steel Structure
Shin, Jeong-Cheol ; Sun, Sung-Min ; Chung, Young-Woo ;
Journal of Korean Society of Steel Construction, volume 23, issue 1, 2011, Pages 1~12
Due to the concept of "full-strength capacity connection," the pushover analysis method became an issue in designing steel connections. It is difficult to apply practically, however, because engineers are unfamiliar with such method. Moreover, there have been insufficient representative studies on them because most of the past pertinent studies were performed based on high-rise and/or virtual structures. As such, for this study, an actual(now in process) steel structure, a medium-low-rise industrial building, was selected. To perform pushover analysis, it was suggested that lateral load patterns be used in a simple and clear manner for three- and two-dimensional analysis models. A new hinge property was also suggested to prevent erroneous connection design results that can occur in the design process. The suggested load patterns showed almost the same results regardless of the model that was used, from which the obtained load patterns were different. This result implies the validity of the suggested load patterns. As for the suggested hinge property, the structural analysis yielded sound and reasonable results, which confirmed the validity of the proposed hinge property.
Effect of Geometric Shapes on Stability of Steel Cable-stayed Bridges
Kim, Seung-Jun ; Han, Seung-Ryong ; Kim, Jong-Min ; Cho, Sun-Kyu ; Kang, Young-Jong ;
Journal of Korean Society of Steel Construction, volume 23, issue 1, 2011, Pages 13~27
This paper presents an investigation of the structural stability of cable-stayed bridges, using geometric nonlinear finite-element analysis and considering various geometric nonlinearities, such as the sag effect of the cables, the beam-column effect of the girder and mast, and the large displacement effect. In this analytic research, a nonlinear frame element and a nonlinear equivalent truss element were used to model the girder, mast, and cable member. The live-load cases that were considered in this research were assumed based on the traffic loads. To perform reasonable analytic research, initial shape analyses in the dead-load case were performed before live-load analysis. In this study, the geometric nonlinear responses of the cable-stayed bridges with different cable arrangement types were compared. After that, parametric studies on the characteristics of the structural stability in critical live-load cases were performed considering various geometric parameters, such as the cable arrangement type, the stiffness ratios of the girder and mast, the area of the cables, and the number of cables. Through this parametric study, the effect of geometric shapes on the structural stability of cable-stayed bridges was investigated.
An Experimental Study on Structural Behavior of Bolted Angle Connections with Austenitic Stainless Steel
Kim, Min-Seong ; Kim, Tae-Soo ; Kim, Seung-Hun ; Lee, Yong-Taeg ;
Journal of Korean Society of Steel Construction, volume 23, issue 1, 2011, Pages 29~39
With regard to steel construction, many studies have been performed to examine the structural behavior of the bolted connections domestically and in other countries. Especially, a domestic study was conducted on the block shear fracture and shear lag effect on the single-bolted angle connection in carbon steel. In this study, specimens were prepared with the end distance parallel to the loading direction and bolt arrangement (
), as the main variables. Then the fracture mode and the curling effect on the bolted angle connection in austenitic stainless steel were investigated. Moreover, the fracture mode and ultimate strength were compared, and the strength reduction by curling was estimated.
Reinforcement Method of a Long Span Plastic Greenhouse using Tension-tie
Shin, Kyung-Jae ; Shin, Dong-Hui ; Lee, Swoo-Heon ; Chae, Seoung-Hun ;
Journal of Korean Society of Steel Construction, volume 23, issue 1, 2011, Pages 41~49
A long-span (more than 8m) plastic greenhouse is currently being used in farms due to its magnified benefits, such as the convenience of the farming equipment used, and the land usage efficiency. In this study, the reinforcing effects of the use of a pretension tie were shown. In a previous study, tests for a 6.5m single-span-type greenhouse announced by Rural Development Administration were carried out. The tests of symmetric and eccentrics now loading by the sun and wind were conducted for the 10.2m span with a
section in this study, after which the load-deflection relationship was compared for the cases of reinforcement with a tie and without a tie. The results of the symmetric snow loading test showed that the strength increased by 68~93% in the case of the specimen with a tied arch. The failure mode of the specimen without a tie tended to be that with a sway failure mechanism, and that of the reinforcement specimens with a tie tended to be that with an arch buckling mechanism. The results of the eccentric snow loading test showed that the strength of the specimen with a tie increased by 10~20% compared to that of the specimen without a tie. For the failure mode of the latter, a combined failure mechanism was adapted, although the failure mode of the tied specimens tended to be that with an arch buckling mechanism.
Fire Resistance of Concrete Filled Double Skin Tubular Columns under Axial Load
Chung, Sang-Keun ; Kim, Sun-Hee ; Lee, Seong-Hui ; Choi, Sung-Mo ;
Journal of Korean Society of Steel Construction, volume 23, issue 1, 2011, Pages 51~59
Although an uncoated CFT column with a high axial-force ratio can be used to secure fire resistance for two hours or less in low-rise buildings, it does not satisfy the three-hour-long fire resistance required in high-rise buildings. Accordingly, so that the uncoated CFT column could be used for high-rise buildings, additional measures for the improvement of its fire resistance should be proposed. In this regard, the use of a Double CFT column as a measure for improving the fire resistance of the uncoated CFT column was proposed in this paper. A fire resistance test was conducted on an uncoated CFT column and a Double CFT column in real scale, under a load. Through such test, the effect of the Double CFT column on fire resistance was evaluated and then compared with that of a variant shape of the cross-section of a steel column.
Experimental Study for Performance Evaluation of Structural Details of Girder-Abutment Joint in Integral Abutment Steel Bridge
Kim, Sang-Hyo ; Yoon, Ji-Hyun ; Choi, Woo-Jin ; Kim, Jun-Hwan ; Ahn, Jin-Hee ;
Journal of Korean Society of Steel Construction, volume 23, issue 1, 2011, Pages 61~72
In this study, the structural details of steel girder-abutment joints with shear connectors and tie bars were suggested to improve the rigid behavior and crack-resisting capacity of the joints in integral bridges. Experimental loading tests of steel girder-abutment joint specimens with the proposed and empirically constructed structural details were carried out, and the capacities and behavioral characteristics of the joints were evaluated through loading tests. Based on the results of the loading tests, it was estimated that all types of tested joints can be applied to the steel girder-abutment joints because they have sufficient stiffness and crack-resisting capacity under the required design and yield loads. According to the initial stiffness, crack propagations, and load-strain relationships, however, the joints with shear connectors and tie bars showed better structural behaviors compared to the empirically constructed joint.
An Experimental Study on the Estimate of Wind Force Coefficient of Transmission Tower Rectangular Frame
Shin, Koo-Yong ; Lim, Jae-Seob ; Hwang, Kyu-Seok ; Kil, Yong-Sik ;
Journal of Korean Society of Steel Construction, volume 23, issue 1, 2011, Pages 73~81
The wind force coefficient of a transmission tower frame shows several characteristics when the section shape, solidity ratio, and wind direction angle are changed. In this study, the wind force characteristics of a transmission tower frame with a basic structure were evaluated using different solidity ratios and wind direction angles in a wind tunnel test. According to the solidity ratio, the size of the structure and the rectangular-frame model of the transmission tower were changed by adding a two-dimensional (2D) or three-dimensional (3D) structure. The transmission tower's rectangular frame was tested by changing the wind direction angle of the 2D-type structure from 0 to
and by changing the wind direction angle of the 3D-type structure from 0 to
Based on the results that were obtained, it can be concluded that the wind force coefficient of a transmission tower frame can be used as preliminary data in deciding the transmission tower's wind load.
Seismic Resistance of Concrete-filled U-shaped Steel Beam-to-RC Column Connections
Hwang, Hyeon-Jong ; Park, Hong-Gun ; Lee, Cheol-Ho ; Park, Chang-Hee ; Lee, Chang-Nam ; Kim, Hyoung-Seop ; Kim, Sung-Bae ;
Journal of Korean Society of Steel Construction, volume 23, issue 1, 2011, Pages 83~97
In this study, the seismic details of a concrete-encased, U-shaped steel beam-to-RC column connection were developed. Three specimens of the beam-to-column connection were tested under cyclic loading to evaluate the seismic performance of the connection. The test parameters were the beam depth and the column section shape. The depths of the composite beams were 610 and 710 mm, including the slab depth. For the RC columns, a square section and a circular section were used. Special details using diagonal re-bars and exterior diaphragm plates were used to strengthen the connections with the rectangular and circular columns, respectively. The test results showed that the specimens exhibited good strength, deformation, and energy dissipation capacities. The deformation capacity exceeded 4% interstory drift angle, which is the requirement for the Special Moment Frame.
Stability Analysis of Steel Cable-stayed Bridges under Construction Stage
Kim, Seung-Jun ; Shim, Kyung-Suk ; Won, Deok-Hee ; Cho, Sun-Kyu ; Kang, Young-Jong ;
Journal of Korean Society of Steel Construction, volume 23, issue 1, 2011, Pages 99~111
This paper presents an investigation of the structural stability of cable-stayed bridges in the construction stage, using geometric nonlinear finite-element analysis and considering various geometric nonlinearities, such as the sag effect of the cables, the P-
effects of the girder and mast, and the large displacement effect. Initial shape analysis and construction-stage analysis were performed to determine the equilibrium of the structure in the construction stage. After that, geometric nonlinear analysis was performed to study structural stability. In this study, the weight of the derrick crane and the key segment were considered the main external loads, which were applied to the tip of the center span. The cable arrangement type and the stiffness ratios of the girder and mast were considered the main parameters of the analytic research. Based on the results of the analysis, the change in the buckling mode and critical load factors with respect to the cable arrangement type and the stiffness ratios of the girder and mast was investigated. The buckling modes of the steel cable-stayed bridges in the construction stage were classified, and the ranges of the stiffness ratios of the girder and mast, which show these classified buckling modes, were suggested.
A Development of Interface Module between Structural Design and Detail Design based on BIM
Eom, Jin-Up ; Shin, Tae-Song ;
Journal of Korean Society of Steel Construction, volume 23, issue 1, 2011, Pages 113~124
This study concerned the interoperability between the structural-analysis model and the default detail model in steel structures available for the structural-design process based on BIM. The purpose of the study was to develop an interface module that can perform data conversion between the analysis and design applications and the BIM applications, through the dotnet frame work development environment using OpenAPI provided by the BIM application vendor. The direct-link method was applied for BIM interoperability. A basic-frame model for detail design and modeling was created from the structural-analysis model to verify if the application was developed. Finally, the proposed process was compared with the existing process to verify the efficiency of the former.
An Experimental Evaluation on Flexural Performance of Light-Weight Void Composite Floor using GFRP
Ryu, Jae-Ho ; Park, Se-Ho ; Ju, Young-Kyu ; Kim, Sang-Dae ;
Journal of Korean Society of Steel Construction, volume 23, issue 1, 2011, Pages 125~135
To obtain a lower story height with a long span and better fire resistance, a new composite floor system using GFRP (glass-fiber-reinforced plastics) was proposed. This floor system consists of asymmetric steel with a web opening, a hollow core ball, concrete, and GFRP. To evaluate the flexural performance of the new composite floor system, an experiment was conducted. The test parameters were the presence of GFRP, the void ratio in relation to the hollow core balls, and the web opening. The test results showed that the resistance and stiffness of the specimen with GFRP were 10% higher than those of the reference specimen, and that fully composite action was accomplished up to the yielding point. After the attainment of the yield strength, the ductility of the specimen was reduced due to the stress concentration around the web openings. The slip between the concrete and steel beam, however, was small. Thus, in the design of the proposed new floor systems, it is desirable that the calculated resistance be reduced by 15%, for safety.