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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 25, Issue 6 - Dec 2013
Volume 25, Issue 5 - Oct 2013
Volume 25, Issue 4 - Aug 2013
Volume 25, Issue 3 - Jun 2013
Volume 25, Issue 2 - Apr 2013
Volume 25, Issue 1 - Feb 2013
Selecting the target year
Evaluation on Applicability of Stress Relief Hole for Improvement of Fatigue Stress Capacity of Steel Structural Details
Jung, Kyoung Sup ; Nam, Seung Hoon ; Kim, Kyoung Nam ; Yang, Keon Bong ;
Journal of Korean Society of Steel Construction, volume 25, issue 5, 2013, Pages 451~461
DOI : 10.7781/kjoss.2013.25.5.451
In steel bridges, there are several details that constrain the deformation such as buckling by external forces. Most of these details which are composed of the intersection members have scallops in order to exclude the weld defects inherently and to get the ease of fabrication and also to decrease the stress concentration. In this study, stress relief hole (SRH) near stress concentration zone with detail category D or under is proposed as a method to improve the resistance on the fatigue crack initiation to detail category C. And the effects of the appropriate size and location of SRH were examined and the applicability to improve the fatigue resistance of the floorbeam web and the rib wall at rib/floorbeam intersection in the orthotropic steel deck bridge was evaluated.
An Experimental Study on Structural Behaviors of Double Shear Bolted Connections Fabricated with Ferritic Stainless Steel (STS430)
Kim, Tae Soo ; Kim, Min Seong ;
Journal of Korean Society of Steel Construction, volume 25, issue 5, 2013, Pages 463~474
DOI : 10.7781/kjoss.2013.25.5.463
Many experimental and numerical researches for thin-walled carbon steel and austenitic stainless steel single shear bolted connections have been conducted and the modified design equations of ultimate strength were proposed. In this study, the tests of double shear bolted connections with bolt arrangements (
) and end distance parallel to the loading direction as main variables were performed. Specimens were planed with a constant dimension of edge distance perpendicular to the loading direction, bolt diameter, pitch and gauge like single shear bolted connections. The test results such as ultimate strength and fracture mode were compared with those of current design standards. Furthermore, modified block shear equations for double shear bolted connections were suggested.
A Study on the Post-buckling Behavior of Slit Type FLD(Force Limiting Device)
Oh, Young Suk ; Kim, Cheol Hwan ; Kim, Chae Yeong ; Chae, Won Tak ;
Journal of Korean Society of Steel Construction, volume 25, issue 5, 2013, Pages 475~486
DOI : 10.7781/kjoss.2013.25.5.475
This research is about design of slit type FLD which secure the buckling stability of compressive brace. 4 slit type and 8 slit type specimens were experimented by pure compressive loading. Comparing the experiment results with FEA results, the good correspondence is appeared each other. Also for deriving strength-displacement formular, an unit section of slit type FLD is transferred to idealized sandwich section. This formular explains satisfactorily experiment results, in given condition. The result of this research will be used as basic data in FLD design.
Application of Direct Analysis Method Considering Initial Imperfection Limitation
Kim, Hee Dong ;
Journal of Korean Society of Steel Construction, volume 25, issue 5, 2013, Pages 487~495
DOI : 10.7781/kjoss.2013.25.5.487
As the first step to suggest effective ways of using direct analysis method considering current situations of construction fields in Korea, analytical approach is used to verify direct analysis method which adapts initial imperfection limitation of Korean specification of building construction. The main analytical variables are size of frames, axial load ratio, axial load distribution, value of notional loads, location of notional loads, and applied method of notional loads. The results show that the use of initial imperfection limitation of Korean specification, L/700 is suitable, and the recommendable method to use direct analysis method is applied notional loads based on L/700 as minimum lateral load at each story, even if B2 is less than 1.5 and lateral loads exist.
Strip Angle Changes in Accordance with the Deformation Mode of Seismic Steel Plate Shear Wall Systems
Lee, Kangmin ; Li, Rui ; Chen, Liuyi ; Oh, Keun Yeong ; Kim, Woo Seok ;
Journal of Korean Society of Steel Construction, volume 25, issue 5, 2013, Pages 497~507
DOI : 10.7781/kjoss.2013.25.5.497
This study investigated the tension-field action induced strip angle changes and deformed mode shapes of SPSW for high-rise structures subjected to lateral forces. Based on the numerical analysis 3, 9, 14 and 20 story structures, shear and flexural modes were identified by comparing the numerical analysis results to the predicted strength by theory. Shear deformation mode exhibited a constant angle in tension-field; whereas, flexural mode of the numerical results, differed from the tension-field action theory.
A Development of Sustainable Interface Module for the Structural Design Information
Eom, Jin Up ; Shin, Tae Song ;
Journal of Korean Society of Steel Construction, volume 25, issue 5, 2013, Pages 509~518
DOI : 10.7781/kjoss.2013.25.5.509
This study is aimed at developing of the sustainable interface module for structural design. It is dealt with the Midas/Gen for analysis and design and Tekla Structures for Building Information Modeling. In this research, it is improved the applicability and function of the existing interface module developed by authors. Although model information was functionally well linked by the existing module in both directions, the applicability is limited due to the difference of attributes between structural analysis model and structural detail model. In this study, we analyzed the problems that occur in existing module. We have developed the interface module to solve the problems and improved the applicability of the existing module.
Earthquake Resistance of Modular Building Units Using Load-Bearing Steel Stud Panels
Ha, Tae Hyu ; Cho, Bong-Ho ; Kim, Tae Hyeong ; Lee, Doo Yong ; Eom, Tae Sung ;
Journal of Korean Society of Steel Construction, volume 25, issue 5, 2013, Pages 519~530
DOI : 10.7781/kjoss.2013.25.5.519
Cyclic tests on modular building units for low-rise buildings composed of stud panels and a light-weight steel perimeter frame, were performed to evaluate the earthquake resistance such as stiffness, load-carrying capacity, ductility, and energy dissipation per load cycle. The strap-braced and sheeted stud panels were used as the primary lateral load-resistant element of the modular building units. Test results showed that the modular building units using the strap-braced and sheeted stud panels exhibited excellent post-yield ductile behaviors. The maximum drift ratios were greater than 5.37% and the displacement ductility ratios were greater than 5.76. However, the energy dissipation per load cycle was poor due to severe pinching during cyclic loading. Nominal strength, stiffness, and yield displacement of the modular building units were predicted based on plastic mechanisms. The predictions reasonably and conservatively correlated with the test results. However, the elastic stiffness of the strap-braced stud panel was significantly overestimated. For conservative design, the elastic stiffness of the strap-braced stud panel needs be decreased to 50% of the nominal value.
An Experimental Study on Structural Capacity of Joint Between Composite PHC Wall Pile and Bottom Slab with CT Shear Connector
Mha, Ho Seong ; Won, Jeong Hun ; Lee, Jong Ku ;
Journal of Korean Society of Steel Construction, volume 25, issue 5, 2013, Pages 531~541
DOI : 10.7781/kjoss.2013.25.5.531
This paper investigated the structural capacity of the CT shear connectors, which is a kind of the perfobond rib and functions as an anchor transferring the tension force in the joint between a composite PHC wall pile and a bottom slab. The direct pull-out test was performed for various specimens. From failure modes and load-displacement curves, it was found that transverse rebars should be placed to holes in a web to restrict pull-out failure of CT shear connectors. The results of additional tests for specimens with transverse rebars and various support lengths indicated that all specimens were failed by the tension failure of PHC pile before pull-out failure of CT shear connector and concrete pull-out failure. Thus, the CT shear connector could endure the tension force between the PHC wall pile and the bottom slab.
A Study of Structural Performance of Self-Drilling Screw Connections
Park, K.Y. ; Jeon, S.H. ; Kim, Y.H. ; Choi, S.M. ;
Journal of Korean Society of Steel Construction, volume 25, issue 5, 2013, Pages 543~553
DOI : 10.7781/kjoss.2013.25.5.543
As the deep deck plate has the shape of open cross section, It can cause structural problems such as bending torsions due to instability of the section. There are a number of fasteners types which are frequently used on light gage steel diaphragms such as bolts, rivets, welds, and screws. In this study, the structural capacity of the self drilling screw connection between the deep deck and the reinforced cap plate was evaluated by experimental variables such as the arrangement method, numbers of screw, pitch of screw, and head plate thickness.
Improvement of Flexural Performance for Deep-Deck Plate using Cap Plate
Park, K.Y. ; Nam, Y.S. ; Choi, Y.H. ; Kim, Y.H. ; Choi, S.M. ;
Journal of Korean Society of Steel Construction, volume 25, issue 5, 2013, Pages 555~567
DOI : 10.7781/kjoss.2013.25.5.555
Slim floor system using deep decks has been developed and employed in Europe to reduce the floor height of steel structures. Although long span buildings involving the issue of reducing floor height are being increasingly built in Korea, employing deep decks in more than 7m long span structures is likely to cause problems associated with excessive deflection. This study is applied to the long-span concrete casting of the deep deck plate usability of deflection due to bending and torsional instability of open cross-section, as a way to improve the problem of cap plates are suggested, and the optimum length of reinforcement and location are derived from theoretic estimation. The cap plates are placed on the deep decks with regular intervals to overcome the instability of open sections, improve the stiffness of the sections and control the deflection at the centers. The improvement in flexural capacity associated with the location of the cap plates and the length of reinforcement are verified through analysis and test.
Experimental Study for Structural Behavior of Embed Plate into Concrete Subjected to Welding Heat Input
Chung, Kyung Soo ; Kim, Ki Myon ; Kim, Do Hwan ; Kim, Jin Ho ;
Journal of Korean Society of Steel Construction, volume 25, issue 5, 2013, Pages 569~578
DOI : 10.7781/kjoss.2013.25.5.569
In a super-tall building construction, thick and large-sized embed plates are usually used to connect mega structural steel members to RC core wall or columns by welding a gusset plate on the face of the embed plate with T-shape. A large amount of heat input accumulated by weld passes causes the plates to expand or deform. In addition, the temperature of concrete around the plates also could be increased. Consequently, cracks and spalls occur on the concrete surface. In this study, the effect of weld heat on embed plates and 80MPa high strength concrete is investigated by considering weld position (2G and 3G position), edge distance, concrete curing time, etc. Measured temperature of the embed plates was compared with the transient thermal analysis results. Finally, push-out tests were performed to verify and compare the shear studs capacity of the embed plate with design requirement. Test result shows that the shear capacity of the plate is reduced by 14%-19% due to the weld heat effect and increased as the concrete curing time is longer.
Analysis of Shear Buckling Stresses for Steel Pipes by Detailed Parametric Study
Mha, Ho-Seong ; Cho, Kwang Il ;
Journal of Korean Society of Steel Construction, volume 25, issue 5, 2013, Pages 579~585
DOI : 10.7781/kjoss.2013.25.5.579
Shear buckling stresses of steel pipes due to the lateral forces have been analyzed via parametric analysis. Detailed FEM models are prepared, and steel types, thickness, radii and length of steel pipes are selected as parameters. STK400, STK490 and SM570 are used and the thickness of pipe is 2mm and 40mm. The radii(R) and lengths(L) are determined based on the values satisfying the following relationship as R/t=20~400 and L/R=1~3. The shear buckling stresses decrease for all types of considered steels as R/t increase from 20 to 200. High strength steels are more sensitive to R/t, and also have an bigger effect on shear buckling stresses than low strength steels. It is found that shear buckling stresses decrease as L/R increases, showing that the steel pipes become weak as the length of the steel pipe increases.