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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 13, Issue 5 - 00 2001
Volume 13, Issue 4 - 00 2001
Volume 13, Issue 3 - 00 2001
Volume 13, Issue 2 - 00 2001
Volume 13, Issue 1 - 00 2001
Selecting the target year
Behavior of Reduced Beam Section Connectios with Web Openins
박종원 ; 강승민 ; 황인규 ; 강태경 ; 권기주 ;
Journal of Korean Society of Steel Construction, volume 13, issue 4, 2001, Pages 23~23
A test program was conducted on seismic-resistant steel moment connectios constructed using Reduced Beam Setions with beam web openings. In teh connection, in order to enhance ductility capacity under severe cyclic loads, a portion of the beam web near the beam-to-column connection is cut out instead of the beam flange as in dogbone connections. A total of 4 large scale specimens were tested in this program. The specimens were all made using H-458×417×30×50 sections for the columns and H-792×300×14×22 sections for the beams. Test specimens showed excellent performance similar to that of dogbone connections.
Production Mechanism of Residual Stress Generated by Multi-Pass Welding of the steel Pipe
Chang, Kyong Ho ; Yang, Sung Chul ; Kang, Jae Hoon ;
Journal of Korean Society of Steel Construction, volume 13, issue 4, 2001, Pages 327~335
The characteristics and production mechanism of residual stress generated by multi-pass welding of the steel pipe were elucidated from the results of three-dimensional thermal elastic-plastic FEM analysis. When the steel pipe was jointed by multi-pass welding, the stress components of circumferential direction and radial direction near welded joints on the inner surface and the outer surface of the pope were tensile. The stress component of axial direction on the inner surface was tensile and on the outer surface was compressive. On the other hands, the production mechanism of residual stress generated by multi-pass welding of the steel pipe was investigated. Residual stress generated by welding of the steel pipe was investigated not only by the thermal history but also by geometrical shape. Then, the generality of the production mechanism of residual stress generated by multi-pass welding was confirmed.
Classification system for figid and semi-rigid connection
Jang, Mee ; Lee, Sang Sup ; Mun, Tae Sup ;
Journal of Korean Society of Steel Construction, volume 13, issue 4, 2001, Pages 351~361
The connections are classified as rigid, semi+rigid, or pinned. There are two classification systems, EC3 adn Bjorhovede et al., representatively. The EC3 boundary between rigid and semi-rigid connections is in on the whole restrictive in term of the stiffness as well as the moment capacity of connections. The boundary specified by Bjorhovede et al. may not be sufficient to assure the behavior of rigid frames in some cases. In this study, it is proposed the new classification system for steel connection that depends on the reduction factor(R) of critical buckling load for unbraced semi-rigid frame expressed by the stiffness ratio(
) of beam to column and the stiffness ratio(k) of connection to beam. Finally, it is examined by experimental data that new classification criteria provides a practical boundary compared wit hteh existing classifications.
The Experimental Studu on the P-Δ Influence of Weak Beam Unbraced Frames
Kim, Hee Dong ; Park, Sang Chul ; Lee, Myung Jae ;
Journal of Korean Society of Steel Construction, volume 13, issue 4, 2001, Pages 363~372
The objective of this study is to evaluate the
effect in the case of weak beam unbraced frames by experimental approach. To evaluate
effect, four specimens were tested under monotonic loading condition. The parameters of tests are the stiffness of column and the axial load ratio. The results show that the value of axial load affects frame stability because
effects promote the yielding of beam. The maximum lateral load increases in proportion to the increment of column stiffness and rotational stiffness of supports, The collapse mechanism of weak beam unbraced frames is stably formed in the condition of low axial load ratio. The
factor of limit state design code does not properly consider the
effect in inelastic region.
Partial Composite Action of Gypsum-Sheathed Cold-Formed Steel Wall Stud Panels
Lee, Young Ki ;
Journal of Korean Society of Steel Construction, volume 13, issue 4, 2001, Pages 373~380
The problem addressed in this study is how to analytically treat the partial composite action for wall panels. An equation, derived for wood-joist floor systems, which determines deflections for beams with partial composite action is introduced. The equation is applied to the calculation of the mid-span deflection for gypsum-sheathed, cold-formed steel was stud panels. The objective of this study is to properly reflect the influence of the following factors in the calculation of mid-span deflection for the panel: connection slip, local buckling, perforations in the stud web, and effects from joints in the sheathing. Predicted deflections based on an upper bound for connection rigidity were closest to experimental deflections.
Performance of Thrie-Beam Guardrail System withe Impact Attenuator
Ko, Man-Gi ; Kim, Kee-Dong ;
Journal of Korean Society of Steel Construction, volume 13, issue 4, 2001, Pages 381~393
The current traffic situation in Korea can be described as rapid change in traffic volume and diversity in vehicle size from compact cars to large trucks. W-beam barrier most widely used in Korea was found not to satisfy the stiffness requirement for the Koran impact condition of 14 ton-60Km/h-15deg. and it was too stiff for small vehicles impacting with more realistic speed to satisfy the safety of vehicle occupants. To develop a guardrail system satisfying the two contradicting goals, a thrie-beam guardrail system, which had the beam thickness of 3.2mm and rubber cushions, was conceived. Even though the height of the thrie-beam(450mm) is increased by 100mm as compared to that of W-beam (350mm), there was only 2% increase in the weight of the thrie-beam. The new thrie-beam barrier system could contain more wide range of vehicle bumper heights, and showed better performance in the viewpoint of stiffness and energy absorbing capability than the W-beam system. The impact performance was evaluated from a crash test. The developed thrie-beam guardrail system satisfied all applicable criteria for NCHRP 350 test designation 3-10.
Impact Performance of High Grade Steel Barrier for Hazardous Area and Strengthening Method
Ko, Man Gi ; Kim, Kee Dong ;
Journal of Korean Society of Steel Construction, volume 13, issue 4, 2001, Pages 407~417
To secure good visibility various steel flexible barriers were introduced and constructed in the area where a highway runs in parallel with a railroad. However, none of the flexible barriers was proven to satisfy the performance criteria for the impact condition of
set forth by Korea design guide. Thus, in this study, the impact performance of the flexible barriers was investigated by using Barrier VII program, which was most widely used for the preliminary design of barriers. From the analytical results, it has been found that none of the barriers satisfied the stiffness requirement while the Type C barrier showed stiffer behavior than the others. Thus, the way to strengthen the installed Type C barrier was experimentally investigated. The method of partially filling concreter inside the pst was efficient to satisfy the performance criteria for the impact condition of
A Study on the properties of flexural behavior according to reinforcing method of Composite Beams of different types of structure
Lim, Byung Ho ; Park, Jung Min ; Kim, Wha Jung ;
Journal of Korean Society of Steel Construction, volume 13, issue 4, 2001, Pages 419~431
This study was to investigate structural behavior of composite structure beams composed of end-RC. center-Steel according to respective reinforcing method for connection zone composed of different materials (SRC) while attaching main bars on steel-flange by welding. The main reinforcing methods are as follows ; non-reinforcing, vertical shear reinforcing (type-stirrup), inclined reinforcing(type-x), horizontal reinforcing(type-web, 0.3L), double horizontal reinforcing (type-web, 0.3L), vertical reinforcing (type-flange, 0.3L). Consequently, It showed little difference in structural properties like ductility and strength according to the attaching method of main bars. For Maximizing the structural properties of composite beam, the most effective methods were vertical reinforcing one and double horizontal reinforcing one.
Study on the Prestressing Effect of 3 Span Continuous Preflex Composite Beam of Bridges by Re-Up Down of Supports
Koo, Min Se ; Park, Young Je ; Kim, Phil Sik ;
Journal of Korean Society of Steel Construction, volume 13, issue 4, 2001, Pages 433~441
Thus study presents the basic concepts of 3 span continuous preflex composite beam of bridges by re-up down of supports and analysis relationship of between variables and stress of critical section. Also, it shows the pre-compression effects of re-up down of supports method by presenting the difference of between old section and new section got from new method. This study's new method makes more economic sections to be possible and when the sections designed with the existing method are used in the new method. efficient stress state is accomplished.
강상판교의 생애주기비용 최적설계
조효남 ; 민대홍 ; 이광민 ;
Journal of Korean Society of Steel Construction, volume 13, issue 4, 2001, Pages 2001~2001
This study present an optimum deck and girder system design for minimizing the life-cycle cost (LCC) of orthotropic steel deck bridges. The problem of optimum LCC design of orthotropic steel deck bridges is formulated as that of minmization of the expected total LCC that consists of initial cost, maintenance cost, expected retrofit costs for strength, deflection, and fatigue. To demonstrate the effect of LCC optimum design of orthotropic steel deck bridges, the proposed optimum LCC design is compared with the conventinal method for orthotropic steel deck bridges design. From the numerical investigations, it may be positively stated that the proposed optimum design procedure for orthotropic steel deck bridges based on the LCC will lead to more rational, economical and safer design.