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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 14, Issue 5 - Oct 2002
Volume 1, Issue 4 - 00 2002
Volume 14, Issue 6 - 00 2002
Volume 14, Issue 4 - 00 2002
Volume 14, Issue 3 - 00 2002
Volume 14, Issue 2 - 00 2002
Volume 14, Issue 1 - 00 2002
Volume 13, Issue 6 - 00 2002
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A study on strength of steel square tubular columns filled with high strength concrete under biaxial eccentric load
Seo, Seong-Yeon ; Keigo, Tsuda ; Atsushi, Nakamura ;
Journal of Korean Society of Steel Construction, volume 14, issue 5, 2002, Pages 567~576
Maximum-strength concrete-ailed steel square tubular columns were tested under concentric and biaxial eccentric load. Buckling length-section depth ratio
, magnitude of eccentricity e, and angle of eccentric load
were selected as experimental parameters. Strength and behavior were also examined. Test results showed that the maximum strength of columns under biaxial eccentric load could be predicted using the previously proposed strength formula of columns under uniaxial eccentric load. Likewise, the behavior and maximum strength of columns could be predicted using the analysis.
Composite Beam Element for Nonlinear Seismic Analysis of Steel Frames
Kim, Kee-Dong ; Ko, Man-Gi ; Yi, Gyu-Sei ; Hwang, Byoung-Kuk ;
Journal of Korean Society of Steel Construction, volume 14, issue 5, 2002, Pages 577~591
This study presented a composite beam element for modeling the inelastic behavior of the steel beam, which has composite slabs in steel moment frames that are subjected to earthquake ground motions. The effects of composite slabs on the seismic behavior of steel moment frames were investigated. The element can be considered as a single-component series hinge type model whose predicted analytical results were consistent with the experimental results. Likewise, the element showed a significantly better performance than the bare steel beam elements. The composite model can also predict more accurately the local deformation demands and overall response of structural systems under earthquake loading compared with the bare steel models. Therefore, composite stabs can significantly affect locally and globally predicted responses of steel moment frames.
Experimental Study for the Development of Steel-Confined Prestressed Concrete Girder
Kim, Jung-Ho ; Park, Kyung-Hoon ; Hwang, Yoon-Koog ; Choi, Young-Min ; Cho, Hyo-Nam ;
Journal of Korean Society of Steel Construction, volume 14, issue 5, 2002, Pages 593~602
A new type of bridge superstructures referred to as Steel-Confined Prestressed Concrete Girder (SCP Girder) was developed, which is composed of concrete, steel plate, and prestressing tendon. The girder may maximize structural advantages of these components; thus, long span bridges with low height girder may be constructed. For the effective design and fabrication of the gilder, the design software program was developed and the process of fabrication established. The experimental girder designed using the program was manufactured in actual size to confirm the fabric ability of the girder. Propriety of design, structural safety, and applicability of the gilder were verified through the load test.
Feasibility Study of High Strength Steel on Steel Bridge
Jeon, Jun-Chang ; Kim, Seok-Tae ; Kyung, Kab-Soo ; Lee, Hee-Hyun ;
Journal of Korean Society of Steel Construction, volume 14, issue 5, 2002, Pages 603~612
Numerical analyses have been carried out in order to check the applicability of high-strength steel to a medium-sized steel bridge. Using the yield strength of steel, Average Daily Truck Traffic (ADTT), and fatigue grade of structural detail as analytical parameters, the minimum weight sections that satisfy the limit states of the AASHTO LRFD design specification were determined through an optimization scheme. Likewise, the effects of the number of girders and span length on the applicability of high-strength steel were evaluated. Results show that high-strength steel may be employed in the steel bridge, since steel weight decreases with increasing yield strength regardless of the fatigue effect. Nonetheless, appropriate countermeasures against fatigue should be determined since it is a major factor in the effective use of high-strength steel in steel bridges.
A Proposal for Damage Index of Steel Members under Cyclic Loading
Park, Yeon-Soo ; Kang, Dae-Hung ; Oh, Jung-Tae ; Choi, Dong-Ho ; Oh, Back-Man ;
Journal of Korean Society of Steel Construction, volume 14, issue 5, 2002, Pages 613~625
This paper aimed to investigate the damage process of steel parts experiencing failure under strong repeated loading. Likewise, a damage index using various factors related to the damage was proposed. An analysis method for evaluating the damage state was also developed. The damage assessment method focused on the local strain history at the cross-section of the heaviest concentration of deformation. Cantilever-type steel parts were analyzed under uniaxial load combined with a constant axial load, considering horizontal displacement history, Loading patterns and steel types were considered as the main parameters in analyzing the models. The effects of the parameters on the failure modes, deformation capacity, and damage process as seen from the analysis results were also discussed. Each failure process was compared as steel types. In addition, the failure of steel parts under strong repeated loading was determined according to loading. Results revealed that the state of the failure is closely related to the local plastic strain.
Optimum Maintenance Strategy of Bridges Based on System Reliability
Yang, Seung-Ie ;
Journal of Korean Society of Steel Construction, volume 14, issue 5, 2002, Pages 627~639
Bridge construction is almost complete in many countries. Thus, the government and highway agencies change their focus from constructing to maintaining. Effectively maintaining bridges require predicting their lifespan using a system reliability viewpoint. Likewise, maintenance models based on the system reliability concept should be developed. Thus, this study developed maintenance models for preventive maintenance and essential maintenance using system reliability and lifetime distributions. The optimal maintenance strategy for an existing bridge was obtained using the developed maintenance models.
A Damage Assessment Technique for Bridges Using Static Displacements
Choi, Il-Yoon ; Cho, Hyo-Nam ;
Journal of Korean Society of Steel Construction, volume 14, issue 5, 2002, Pages 641~646
A new damage detection technique using static displacement data was developed, in order to assess the structural integrity of bridge structures. In conventional damage assessment techniques using dynamic response, the variation of natural frequencies is intrinsically insensitive to the damage of the bridge: thus, it is usually difficult to obtain them from the measured data. The proposed detection method enables the estimation of the stiffness reduction of bridges using the static displacement data that are measured periodically, without requiring a specific loading test. Devices such as a laser displacement sensor can be used to measure static displacement data due to the dead load of the bridge structure. In this study, structural damage was represented by the reduction in the elastic modulus of the element. The damage factor of the element was introduced to estimate the stiffness reduction of the bridge under consideration. Likewise, the proposed algorithm was verified using various numerical simulations and compared with other damage detection methods. The effects of noise and number of damaged elements on damage detection were also investigated. Results showed that the proposed algorithm efficiently detects damage on the bridge.
A Study on the Weld Performance of High Strength Steel considering the Fabrication
Kyung, Kab-Soo ; Hong, Sung-Wook ; Park, Yong-Jin ;
Journal of Korean Society of Steel Construction, volume 14, issue 5, 2002, Pages 647~656
High-strength steel in steel bridges is the key to achieving cost-efficiency because it facilitates lightweight construction and rationalizes structure. The future of high-strength steel is bright, with its use projected to expand. As such, it is necessary to evaluate precisely various factors affecting the process of fabricating high-strength steel, i.e., welding heat, strain hardening, and weldability and performance of the welded joints. This study therefore performed the maximum hardness test and y-groove weld crack test using welding processes such as SAW, FCAW, and GMAW, in order to investigate the welding performance and characteristics of welded Joints or high-strength steel produced in Korea such as SM570, POSTEN60, and POSTEN80. In addition, a series of welding tests was carried out to estimate the tensile strength, bending characteristics, absorbed energy, and hardness in welded joints.
Ultimate Strength of branch-rotated T-joints in Cold-formed Square Hollow Sections - Chord flange failure mode -
Bae, Kyu-Woong ; Park, Keum-Sung ; Kang, Chang-Hoon ; Moon, Tae-Sup ;
Journal of Korean Society of Steel Construction, volume 14, issue 5, 2002, Pages 657~664
This paper described the ultimate strength and deformation limit of the new uniplanar T-joints in cold-formed square hollow sections. In the configuration of the new T-joint, only a branch member is orientated to a chord member at 45 degrees in the plane of the truss. This study focused on the branch-rotated T-joints that were governed by chord flange failure in previous studies. Test results of the T-joint in cold-formed square hollow sections revealed a deformation limit of 3%B for
. The existing strength formulae for traditional T-joint were determined and a new yield-line model for the branch-rotated T-joint proposed. Finally, the strength formula on the yield-line analysis was compared with test results and the application range of the proposed formula recommended.
Experimental Study on the Buckling Behavior of L-Shaped Header System
Park, Wan-Soon ; Kim, Gap-Deuk ;
Journal of Korean Society of Steel Construction, volume 14, issue 5, 2002, Pages 665~674
The back-to-back and box-shaped headers used in light gauge steel structures have some disadvantages, i.e., construction efficiency and cost competitiveness. As such, cold-formed steel L-shaped headers have been developed and are used actively in advanced nations. However, this system has not been used in Korea because of inadequate investigation and adaptation efforts and lack of application example. Thus, this research evaluated the structural performance of L-header using buckling analyses and bending tests. Test results were compared using the AISI design criteria. Test results showed that local buckling and distortional buckling governed buckling behavior in gravity loads and uplift loads, respectively. These results were consistent with the calculated nomial strengths using the AISI design criteria.
Experimental Study on the Machenical Properties of Composite Beam Composed End Reinforced Concrete and Center Steel
Kim, Cheol-Hwan ; Chae, Won-Tak ;
Journal of Korean Society of Steel Construction, volume 14, issue 5, 2002, Pages 675~682
The beam of composite structure composed of the RC structure in the end part and steel structure in the central palt were investigated during cyclic loading, in order to evaluate strength, stiffness, and deformational capacity. The parameters used in this study include the amount of reinforced steel bar between the steel beam and RC structure and the existence of the sticking plate. Test results showed that all specimens had stabilized hysteresis loops. Likewise, the specimens with sticking plate had higher load-carrying capacity compared with the one without it. In addition, the stiffness of the composite structure was higher than the steel structure. All specimens also showed good rotational capacity.