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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 12, Issue 5 - Oct 2000
Volume 12, Issue 4 - Aug 2000
Volume 12, Issue 3 - Jun 2000
Volume 12, Issue 2 - Apr 2000
Volume 12, Issue 1 - Feb 2000
Volume 12, Issue 6 - 00 2000
Selecting the target year
Modified Simulated Annealing Algorithms for Optimal Seismic Design of Braced Frame Struvtures
이상관 ; 성창원 ; 박효선 ;
Journal of Korean Society of Steel Construction, volume 12, issue 6, 2000, Pages 629~629
With the positive features of simulated annealing algorithms such as simplicity of the algorithm and the possibility of finding global optimum solution, SA algorithm has been widely applied to structural optimization problems. However, the algorithms are far from practical applications in structural design or optimization of building structures due to requirement of a large number of iterations and dependency on cooling schedule and stopping criteria. In this paper, with the modification of annealing process and stopping criteria, a MSA algorithm is presented in the form of two phase annealing process for optimal seismic design of braced structures. The performance of the proposed algorithm has been illustrated in detail.
A Elastic Analysis for the Impact Response Analysis of Two-Layered Cylindrical Shells
박승진 ; 륭삼상 ;
Journal of Korean Society of Steel Construction, volume 12, issue 6, 2000, Pages 639~639
A model analysis is used to predict the impact response of a simply supported elastic circular cylindrical shell composed of two bonded isotropic layers. The governing equations for a two-layered cylindrical shell are derived on the basis of an improved theory for the single-layer shell which includes the effects of transverse shear deformation and rotary inertia. Calculations are made for the specific case of the steel-concrete cylindrical shell subjected to a suddenly applied load. The solutions show that the method yields very good results. Therefore the proposed method is useful not only for a better investigating of the response characteristics of the shell but also available for a check on other numerical methods such a FEM.
A Study on the Materials Characteristics of High Tensile Strength Steel(SM570) Plates
임성우 ; 고상기 ; 하동우 ; 오상훈 ; 장인화 ;
Journal of Korean Society of Steel Construction, volume 12, issue 6, 2000, Pages 649~649
In this study, the chemical compositions and mechanical properties of high tensile strength steel plates in accordance with their thickness are quantitatively estimated, that are steel plates SM570 to be purposed to use in building structure. Test results of steel plates SM570 are compared with those of steel plates SS400 and steel plates SM490 mostly using building structure. It is found that chemical compositions, carbon equivalent, parameter of welding crack susceptibility, yield strength, tensile strength, elongation, and impact strength have satisfied the prescribed value in KS code for all case of thickness.
A Nonlinear Analysis of Cable Stayed Bridge including Sway Vibrational Effects using Multiple Cable Elements
성익현 ; 윤기용 ;
Journal of Korean Society of Steel Construction, volume 12, issue 6, 2000, Pages 661~661
To investigate the characteristics of the dynamic response of long-span cable-stayed bridges due to various dynamic loadings likes moving traffic loads, two different 3-D cable-stayed bridge models are considered in this study. Two models are exactly the same in structural configurations but different in finite element discretization. Modal analysis is conducted using the deformed dead-load tangent stiffness matrix. A new concept was presented by using divided a cable into several elements in order to study the effect of the cable vibration (both in-plane and swinging) on the overall bridge dynamics. Futhermore case of asymmetric traffic loading clustered in one direction are also considered to study the torsional response of the bridge. The result of this study demonstrates the importance of cable vibration on the overall bridge dynamics.
Study on the Composite Capacity of Composite Slabs by Deckplate Section Shapes
주기수 ; 박성무 ;
Journal of Korean Society of Steel Construction, volume 12, issue 6, 2000, Pages 671~671
This paper provides the results of the study on the structural behavior of the composite metal deck slab system. The experimental study on composite slabs with trapezoidal and inverse-triangle-top-flange deckplate result, it was found that the geometry of the cross-section was more important than any other factors to ensure the composite action of deck slabs. Hence the inverse-triangle-top-flange of closed box was more effective on the shear slip and deflection than the trapezoidal deck of open shape. These results show that the continuing development of composite deck plate must consider importantly the geometry of the deck. The experimental results were compared with established formulas and were analysed to advance a theory on composite slabs using deckplates.
Analytical Study on Strength Resistance of Steel Beams with Stiffened Ends by Reinforced Concrete -difference of behavior with fixing plate-
Journal of Korean Society of Steel Construction, volume 12, issue 6, 2000, Pages 681~681
Recently, a long span is often required for the spacious building. Therefore the increase of stiffness is necessary to prevent floor vibration and control deformation of the building under earthquake and wind loads. For this purpose, steel beams with stiffened ends by reinforced concrete are effective. To realize such an effective reinforcement method, the smoothening of bending and shear stress transmission at the boundaries between middle-part of the steel beam and both end-parts of the steel beam with stiffened ends by reinforced concrete is required. Therefore, the fixed plate was installed at the boundary with the view of transferring the stress smoothly. This paper evaluates the method of effective transmission of bending and shear stress through the numerical analysis that is based on advanced experimental tests.
Strain Energy Characterics of Antisymmetric Angle-Ply Laminated Plates
Journal of Korean Society of Steel Construction, volume 12, issue 6, 2000, Pages 691~691
A powerful analytical procedure and strain energy analysis to investigate the free vibration of antisymmetric angle-ply laminated plates, having one pair of opposite edges simply supported, are develped on the basis of the Yang, Norris and Stavsky (YSN) theory. The equation of motion of the plate are solved by the use of collocation method. A range of results are presented for plates to show the effects of modulus ratio and number of layers on natural frequency. In addition, an analysis of the strain energy distributions is used as an aid for the better understanding of the vibration characteristics of the plates.
Fatigue Characteristics of Non Load-Carrying Fillet Welded Joints according to Post-Processing in Weld Bead Toes
홍성욱 ; 경갑수 ; 최종호 ; 용환선 ;
Journal of Korean Society of Steel Construction, volume 12, issue 6, 2000, Pages 701~701
In this study, the 4-point bending test been performed in order to estimate effect of grinding on fatigue characteristics quantitatively for as-welded specimen, grinding specimen & TIG-dressing specimen for non load-carrying fillet welded joints subjected to pure bending. As a result of fatigue tests, fatigue strength at 2×106 cycles of grinding specimen and TIG-dressing specimen has been increased compared with as-welded specimen and satisfied the grade of fatigue strength prescribed in specifications of domestics and AASHTO & JSSC. As a result of beachmark test, fatigue cracks on all specimens have occurred at several points where stress
Static and Dynamic Analysis for a Double Link Type Level Luffing Jib Crane
문덕홍 ; 허철원 ;
Journal of Korean Society of Steel Construction, volume 12, issue 6, 2000, Pages 715~715
As a link composition of a double link type level luffing jib crane was determinated through the link composition design, the design to be considered will be computations of the luffing trajectory deviation at the fly jib tip and the required luffing device capacity. This paper is a study regarding the static and dynamic analysis for a mechanism of the crane. The objective of the static analysis is to determinate the capacity and the dimension of luffing device when the crane selfload, rated hoisting load, wind load and inertia force are applied on the crane. The objective of dynamic analysis is to compute the luffing trajectory deviation, velocity and inertia force due to luffing acceleration for each link. All analyses are performed by computer programs. The reliability of the program was checked by results from analyses of the related commercial package. It is expected that the productivity and reliability of the design can be improved by this program which can rapidly and exactly deal with static and dynamic analysis for a given link composition of the crane.
Effects of Vehicle Loads on Thermal Buckling Behavior of Continuous Welded Rail Tracks
최동호 ; 김호배 ;
Journal of Korean Society of Steel Construction, volume 12, issue 6, 2000, Pages 727~727
The present study investigates the influences of vehicle induced loads on the thermal buckling behavior of straight and curved continuous welded rail (CWR) tracks. Quasi-static loads model is assumed to determine the uplift region, which occurs due to the vertical track deflection induced by wheel loads of vehicle. The lateral loads of vehicle induced by weight, the speed, the superelevation and curvature of track, and other dynamic vehicle track interaction, are included in the ratio of lateral to vertical vehicle load. Parametric numerical analyses are perfomed to calculate the upper and lower critical buckling temperatures of CWR tracks, and the comparison between the results of this work and the previous results without vehicle is also included.
Parametric Instability of Cylinderical Panels
박승진 ; 삼상륭 ;
Journal of Korean Society of Steel Construction, volume 12, issue 6, 2000, Pages 737~737
This paper presents a numerical analysis procedure and a characteristics for dynamic of cylindrical panels. The panels with simply-simply or simply-clamped edge supports are subjectes to circumferential compressive or flexural stresses. The differential equations governing vibration and dynamic for these panels are derived by using the fundamental differential equation of the Love-Timoshenko and are solved numerically by the Galerkin method. The panel with simply-clamped edge supports is used a trigonometric function or an eigen function of a beam as a trial function and the effects of trial functions on numerical solutions are displayed. Numerical results are presented to demonstrate the effects of the flexural parameters in natural frequencies and coefficients of critical buckling, and some typical mode shapes of vibration and buckling are also presented.
Analysis of Sandwich Plates with Composite Facings based on Zig-Zag Models
지효선 ; 장석윤 ;
Journal of Korean Society of Steel Construction, volume 12, issue 6, 2000, Pages 749~749
This study presents a governing equations of bending behavior of sandwich plates with thick metal, polymer composite facings. Based on zig-zag models for through thickness deformations, the transverse shear deformation of composite facings is included. All edges of plate are assumed to be simply supported. Results of the bending analysis under lateral loads are presented for the influence of various lay up sequences of antisymmetric angle-ply laminated facings. The accuracy of the approach is ascertained by comparing solutions from the sandwich plates theory with composite facings to the laminated plates theory. Since the present analysis considers the bending stiffness of the core and also the transverse shear deformations of the laminated facings, the proposed method showed higher than that calculated according to the general laminated plates theory. The information presented might be useful to design sandwich plates structure with metal, polymer matrix composite facings.
Evaluation on Fire Test for the Concrete Filled Steel Tube Column -Fire Damage Evaluation on Steel Tube and Concrete after a Fire Test-
박기창 ; 최성모 ; 김동규 ;
Journal of Korean Society of Steel Construction, volume 12, issue 6, 2000, Pages 759~759
In this study, the time dependent internal stress changes of a Concrete Filled Steel Tube(CFT) column during a fire test were quantitatively analyzed. The strain ratio of a CFT column on the different loads was measured by tensile strength tests in terms of yield strength, tensile strength average extensibility and elasticity modulus. To understand the internal material properties change of concrete in CFT column damaged due to a fire, the compressive strength and elastic modulus tests were measured on a core sample from the center of the steel tube after the fire test. The elastic modulus test measured the strain from the stress. To determine the fire temperature of the test material, a differential thermal analysis was done. From the tested result, the gained data were conducted and an analysis method was suggested. The purpose of this work is to suggest a basic data for structure regulation enactments of the internal fire design of CFT.
Evaluation of Seismic Performance in Relation to Beam-Panel Zone Strength Ratio of CFT Column to H-beam Endplate Connections
김영주 ; 김재건 ; 오영석 ; 문태섭 ;
Journal of Korean Society of Steel Construction, volume 12, issue 6, 2000, Pages 769~769
This paper presents the results of cyclic seismic performance in relation to beam-panel zone strength ratio of CFT Column to H-beam steel moment connections. Each test specimen consisted of H-350×175×7×11 beam(SS400) and □-250×250×9, □-250×250×12 column(SPSR400). Main parameter is a column panel zone strength relative to beam strength. Energy absorption capacity available in the specimens ranged from 5.2 to 12.7(tm). If panel zone strength relative to beam strength is too strong or weak, the energy absorption capacity tended to be inferior. About steel moment-resisting frame, the test results of this experiment seem to support the investigation that permitting panel zone yielding shall be more advantageous to enhancing total seismic performance.