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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
Performance Evaluation of Rahman-type Movable Joint System for Temporary Bridge
Kim, Sang Hyo ; Joung, Jung Yeun ; Heo, Won Ho ; Jung, Chi Young ;
Journal of Korean Society of Steel Construction, volume 25, issue 1, 2013, Pages 1~13
DOI : 10.7781/kjoss.2013.25.1.001
Most rahmen-type temporary bridges are constructed with limited bridge length to prevent excessive horizontal forces due to the thermal expansion of main girder. To achieve a long length temporary bridge several independent bridges are required and they can not share the bents, at the rahmen-type ends, with the adjacent ones. The additional bents require more cost and reduce the section space under bridges. In order to remove extra bents with keeping the rahmen effect at the bridge ends, this study proposes a new rahmen-type movable joint system for temporary bridges.
Hysteresis Behavior of Semirigid CFT Column-to-Beam Connections with a Double Web-Angle
Lee, Sung Ju ; Kim, Joo Woo ;
Journal of Korean Society of Steel Construction, volume 25, issue 1, 2013, Pages 15~24
DOI : 10.7781/kjoss.2013.25.1.015
This paper presents the results from a systematic finite element study on the bending moment resisting capacity of double web-angle connection for a CFT(concrete filled tube) composite frame subjected to cyclic loading. The three-dimensional nonlinear finite element models are constructed to investigate the rotational stiffness, bending moment capacity, and failure modes of the partially restrained composite CFT connections. A wide scope of additional structural behaviors explain the different influences of the double web-angle connections parameters, such as the different thickness of connection angles and the gage distances of high strength steel connection bar. The moment-rotation angle relationships obtained statically from the finite element analysis are compared with those from Richard's theoretical equation.
An Experimental Study on the Flexural Behavior for the Slabs using the Suspending Deck plate
Bae, Kyu Woong ; Lee, Sang Sup ; Park, Keum Sung ;
Journal of Korean Society of Steel Construction, volume 25, issue 1, 2013, Pages 25~34
DOI : 10.7781/kjoss.2013.25.1.025
The purpose of the this paper is experimentally to investigate flexural behavior of slabs with suspending the deck plate. The main experimental parameters are the depth and thickness of the deck plate, slab span, rebar and support conditions. Total number of six specimens were tested and manufactured in slabs under vertical load. Based on the results of the test, the flexural behavior for slabs is determined according to the vertical deformation of the slabs, regardless of the main experimental parameters. Bending rebar reinforcement in the rib cross-section specimens can be evaluated significantly higher initial stiffness, crack stiffness and flexural strength. Result of the comparison of the theory value appeared to be fairly well matched to average 1.05.
Experimental Study on Two-Seam Cold Formed Square CFT Column to Beam Connections with Asymmetric Diaphragms
Oh, Heon Keun ; Kim, Sun Hee ; Choi, Sung Mo ;
Journal of Korean Society of Steel Construction, volume 25, issue 1, 2013, Pages 35~45
DOI : 10.7781/kjoss.2013.25.1.035
The concrete-filled tube column has the excellent structural performance. But it is difficult to connect with column and beam because of closed section. It suggests that pipe should be produced by welding two sides together where two shapes are joined after a channel is pre-welded onto the three sides in order to form an internal diaphragm. The upper diaphragm of the connection used the horizontal plate and the lower diaphragm used the Vertical plate. This research performed 6 monotonic tension experiments describing the connection upside and downside in order to evaluate the structural capability of the offered connection. And the cyclic loading experiment was performed about 2 T-Type column to beam connections. As to the experimental result edge cutting geometry, there was no big effect. An increase in the number of holes of the plate ultimate strength was increased by 5% and The thickness of the plate increases, the maximum strength was increased by 4%. T-Type connections until it reaches the plastic moment showed a stable behavior.
Study on the Cyclic Seismic Testing of U-shape Hybrid Composite Beam-to-Composite Column Connections
Kim, Sung Bae ; Kim, Sang Seup ; Ryu, Deog Su ;
Journal of Korean Society of Steel Construction, volume 25, issue 1, 2013, Pages 47~59
DOI : 10.7781/kjoss.2013.25.1.047
This study that is a successive secondary study right after the primary bending strength test of a new form of U-shape hybrid composite beam is a cyclic seismic test of U-shape hybrid composite beam and column conncetion. Three specimens are built for the variables which are kinds of columns, depth of beam, continuity or discontinuity of upper plate of beam, and a number of steel bars of end-beam. Kinds of columns are a reinforcement concrete column and a ACT column of CFT shape, and beam depth are 300, and 500 mm. Detail of connection is bolt connection with using a short bracket that is commonly use. As the result, deformability of 2~4% is ensured the floor displacement angle. If it is the negative moment, the maximum moment shows that its capacity is above the nominal moment.
Ultimate Strength and Design Method of Turn-buckle for Measuring Tensile Force
Lee, Swoo Heon ; Shin, Kyung Jae ; Lee, Hee Du ;
Journal of Korean Society of Steel Construction, volume 25, issue 1, 2013, Pages 61~70
DOI : 10.7781/kjoss.2013.25.1.061
A turn-buckle is capable of adjusting the tensile force by left-hand threads and right-hand threads between tension members. There are different types of turn-buckles according to tension member and connection form but the practical and existing turn-buckles are incapable of measuring the tensile force. A turn-buckle for adjusting and measuring tensile force has therefore been developed. This study shows the ultimate strength and reliability for measurement of the new turn-buckles through finite element analysis of the developed ones. From analytic results of the new turn-buckles which have the measurement limit loads of 100kN, 200kN and 300kN, the ultimate strength is approximately five times stronger than the measurement limit capacity. Additionally, a review of the new turn-buckle, which has the measurement limit load of over 300kN, shows that there is a tendency for the size of turn-buckle to become larger. So the connection devices were designed and the loading test was conducted from the concept that the parallel connection of turn-buckle with 300kN capacity can measure the tensile force of 600kN. The results of parallel loading test show the sufficient possibility. Furthermore, the mock-up test was constructed to investigate the release of initial load and corrosion when the new turn-buckle is installed at the outdoor and exposed to rain and atmosphere.
Experimental Evaluation of Fire Behavior of High-Strength CFT Column with Constant Axial Load
Chung, Kyung Soo ; Choi, In Rak ; Kim, Do Hwan ; Kim, Jin Ho ;
Journal of Korean Society of Steel Construction, volume 25, issue 1, 2013, Pages 71~80
DOI : 10.7781/kjoss.2013.25.1.071
Fire-resistant (FR) test data for a square concrete-filled steel tube (CFT) columns consisting of high-strength steel (fy>650MPa) and high strength concrete (fck>100MPa) under axial loads are insufficient. The FR behavior of square high-strength CFT members was investigated experimentally for two specimens having
with two axial load cases (5,000kN and 2,500kN). The results show that the FR performance of the high-strength CFT was rapidly decreased at earlier time (much earlier at high axial load) than expected due to high strength concrete spalling and cracks. In addition, a fiber element analysis (FEA) model was proposed and used to simulate the fiber behaviour of the columns. For steel and concrete, the mechanical and thermal properties recommended in EN 1994-1-2 are adopted. Test results were compared to those of numerical analyses considering a combination of temperature and axial compression. The numerical model can reasonably predict the time-axial deformation relationship.
Cyclic Test of Shear Wall Damping Systems
Ahn, Tae Sang ; Kim, Young Ju ; Kim, Hyung Geun ; Jang, Dong Woon ; Choi, Kyoung Kyu ; Kim, Jong Rak ;
Journal of Korean Society of Steel Construction, volume 25, issue 1, 2013, Pages 81~92
DOI : 10.7781/kjoss.2013.25.1.081
The objective of conventional seismic design is to ensure an acceptable safety level while avoiding catastrophic failures of structures and loss of life. Over the last many years, a large amount of research has been devoted into developing effective earthquake resistant systems in order to raise the seismic performance level of structures. The purpose of this study is to propose a new damping system, which realize not only increasing seismic performance but also easy repairing after an earthquake. The proposed damping system is slit in the bottom of wall with damping devices installed in the slit horizontally aiming to dissipate energy during earthquakes. Cyclic loading tests were conducted to investigate hysteretic behavior and energy dissipation capacity. Test results show that the proposed systems exhibit a stable hysteretic response and the energy dissipation in this system is concentrated on the damping devices.
A Study on Out-of-Plane Flexural Behavior of the Structure with a Vertical Plane Connection between a Reinforced Concrete Wall and a Steel Plate Concrete Wall
Hwang, Kyeong Min ; Lee, Kyung Jin ; Hahm, Kyung Won ; Kim, Won Ki ;
Journal of Korean Society of Steel Construction, volume 25, issue 1, 2013, Pages 93~102
DOI : 10.7781/kjoss.2013.25.1.093
This paper describes the experimental study on the structural behavior of the vertical plane connection between a reinforced concrete wall and a steel plate concrete wall under out-of-plane flexural loads. The specimen was tested under a dynamic test with the use of cyclic loads. As a result of the test, ductile failure mode of vertical bars was shown under a push load and the failure load was more than that of the nominal strength of the specimen. However, the shear failure mode of the connection was confirmed in case of a pull test and thus demonstrates a need for a shear reinforcement.
A Study on Beam-to-Column Connections with Plate Type Energy Absorption System
Oh, Sang Hoon ; Park, Hae Yong ;
Journal of Korean Society of Steel Construction, volume 25, issue 1, 2013, Pages 103~114
DOI : 10.7781/kjoss.2013.25.1.103
Recently, there is a growing interest on sustainable connection system that makes it possible to reuse of main structural members by concentrating most of the damage in the frame caused by strong horizontal force, such as earthquake, to damper. In this study proposed a new type of damage-controlled connection system applying these concepts and analysed the major structural performance of the proposed system through the full-scale cyclic loading test and nonlinear finite element analyses. According to the result, it derived the optimal damper/beam strength ratio that minimize the damage of main members and satisfy at least the fully plastic moment of the beam. And it was to verify the possibility of applying as seismic connection details.