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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 23, Issue 6 - Dec 2011
Volume 23, Issue 5 - Oct 2011
Volume 23, Issue 4 - Aug 2011
Volume 23, Issue 3 - Jun 2011
Volume 23, Issue 2 - Apr 2011
Volume 23, Issue 1 - Feb 2011
Selecting the target year
Study on the Ultimate Strength of Gusset Plate-Circular Hollow Section(CHS) Joint
Kim, Woo-Bum ; Shin, Kyung-Jae ; Choi, Hyung-Hwa ;
Journal of Korean Society of Steel Construction, volume 23, issue 5, 2011, Pages 523~533
The demand for the circular hollow section (CHS) has been increasing due to its structural advantage in long-span structures and high-rise buildings. There are not enough researches on the CHS structure, though. The behavior of the gusset plate CHS joint, to predict the ultimate strength, is not easy to predict because the load deflection curve does not show consistency. Therefore, in this study, experiments and finite element analysis (FEA) were carried out to determine the ultimate strength according to the proposed ultimate deformation limit. Finally, a reasonable ultimate strength formula was proposed through comparisons with other design guides.
Semi-rigid Elasto-Plastic Post Buckling Analysis of Space Frame by Using the Explicit Arc-Length Method
Lee, Kyoung-Soo ; Han, Sang-Eul ;
Journal of Korean Society of Steel Construction, volume 23, issue 5, 2011, Pages 535~546
In this paper, semi-rigid elasto-plastic post-buckling analysis of a space frame was performed using various explicit arc-length methods. Various explicit arc-length methodsand a large-deformation and small-strain elasto-plastic 3D space frame element with semi-rigid connections and plastic hinges were developed. This element can be appliedto both explicit and implicit numerical algorithms. In this study, the Dynamic Relaxation method was adopted in the predictor and corrector processesto formulate an explicit arc-length algorithm. The developed "explicit-predictor" or "explicit-corrector" were used in the elasto-plastic post-buckling analysis. The Eulerian equations for a beam-column with finite rotation, which considers the bowing effects, were adopted for the elastic system and extended to theinelastic system with a plastic hinge concept. The derived tangent stiffness matrix was asymmetrical due to the finite rotation. The joint connection elements were introduced for semi-rigidity using a static condensation technique. Semi-rigid elasto-plastic post-buckling analyses were carried out to demonstrate the potential of the developed explicit arc-length method and advanced space frame element in terms of accuracy and efficiency.
Experimental Tests and Analytical Study for the Prediction of the Plastic Moment Capacity of an Unstiffened Top and Seat Angle Connection
Yang, Jae-Guen ; Choi, Jung-Hwan ; Kim, Hyun-Kwang ; Park, Jae-Ho ;
Journal of Korean Society of Steel Construction, volume 23, issue 5, 2011, Pages 547~555
An unstiffened top and seat angle connection is a type of partially restrained connection that is suitable for low- and medium-rise steel buildings. The plastic moment resisting capacity of such connection is needed in practical design, in addition to the accurate prediction of the initial rotational stiffness. Therefore, most of the studies conducted for the mentioned connections were performed to predict the initial stiffness and the plastic moment resisting capacity with varying geometric properties. The main parameters of such experimental tests were the thickness and high-strength bolt gauge distance of AISC LRFD-type A top and seat angle connections. Based on the test results, the analytical model was also proposed in this study. The applicability of the proposed model was verified by comparing the test results from this study with those of other studies.
Computation and Verification of Approximate Construction cost of Steel Box Girder Bridge by Using Case-Based Reasoning
Jung, Min-Sun ; Kyung, Kab-Soo ; Jeon, Eun-Kyoung ; Kwon, Soon-Cheol ;
Journal of Korean Society of Steel Construction, volume 23, issue 5, 2011, Pages 557~568
To effectively come up with and secure a national budget, it is very important to estimate the reasonable construction cost of each step in public construction projects. In this study, the approximate construction cost of a steel box girder bridge in the early stages of the project, on which available information is limited, was proposed using case-based reasoning. In addition, construction cost estimation models were used for existing sample design models, and the accuracy of the estimation model for the presented cost was verified. The analysis results showed that the error rate was comparatively stable. Therefore, it is expected that construction cost estimation will be effectively suggested in the country's budget preparation.
Fatigue Evaluation of District Heat Pipes based on the Measured Data
Park, Jin-Eun ; Kyung, Kab-Soo ; An, Yong-Mo ; Kwon, Soon-Cheol ;
Journal of Korean Society of Steel Construction, volume 23, issue 5, 2011, Pages 569~579
Heating pipes, which are among the main equipment in district heating systems, can be classified into supply and return pipes. Because when the district heating transmission pipe, which is charged with district heating in small to medium-size cities, is under thermal stress during temperature variances in heating water, it suffers from the fatigue phenomenon caused by the thermal stress, according to the number of its service years. District heatingpipes have shown various characteristics according to the operating condition of the service connections, and the irregular temperature variance has had a bad influence on fatigue heating pipes. Therefore, in this study, a field test on laid heating pipes was performed, and the data for each region were analyzed. Also, the fatigue safety of district heating pipes was evaluated via cycle-based evaluation and stress-based evaluation.
Optimum Structural Design of Sinusoidal Corrugated Web Beam Using Real-valued Genetic Algorithm
Shon, Su-Deok ; Lee, Seung-Jae ;
Journal of Korean Society of Steel Construction, volume 23, issue 5, 2011, Pages 581~593
The underlying advantages of using thin-walled corrugatedwebs instead of plate girders with stiffeners are the elimination of instability problems associated with buckling of the thin-walled flat plate, and elimination of the need for transverse stiffeners, which alsoresults in economic advantages. This paper focuses on two aspects related to the structural design technique forsinusoidal corrugated web steel beams, and the optimum design of the beams using real-value genetic algorithms. The structural design process and design variables used in this optimization werecomposed with EN 1993-1-5, DASt-R015 standard and Pasternak et al. (2004), and the valid design capacity of shear buckling of the standards were compared. For the optimum structural design, the objective function, presented as the fullweight of the sinusoidal corrugated web beams, and the slenderness, member forces, and maximum deflection of the beam, were considered constraints. Finally, the simple beam under the uniform load was adopted as a numerical example, and the effective probability parameters of the genetic operators were considered to find the global minimum point.
Seismic Analysis of Mid Rise Steel Moment Resisting Frames with Relative Stiffness of Connections and Beams
Ha, Sung-Hwan ; Kang, Cheol-Kyu ; Han, Hong-Soo ; Han, Kweon-Gyu ; Choi, Byong-Jeong ;
Journal of Korean Society of Steel Construction, volume 23, issue 5, 2011, Pages 595~606
This study was conducted to investigate the seismic behavior of steel member resisting frames considering the relative stiffness of the connection and beams. Six-story steel moment frames were designed to study the seismic behavior. The connections were classified into Double Web-Angle connections (DWAs), Top- and Seat-angles with double Web-angles (TWSs), FEMA-Test Summary No. 28, Specimen ID: UCSD-6 (SAC), and Fully Restrained (FR). The rotational stiffness of the semi-rigid connections was estimated using the Three-Parameter Power Model adopted by Chen and Kishi. The relative stiffness, which is the ratio of the rotational stiffness of the connections to the stiffness of the beams, was used. Push-over, repeated loading, and time history analysis were performed for all the frames. The seismic behavior of each frame was analyzed with the story drift, plastic hinge rotation, and hysteretic energy distribution.
Nonlinear Dynamic Behaviors of Laminated Composite Structures Containing Central Cutouts
Ji, Hyo-Seon ; Lee, Sang-Youl ;
Journal of Korean Society of Steel Construction, volume 23, issue 5, 2011, Pages 607~614
This study deals with thegeometrical nonlinear dynamic behavior of laminated plates made of advanced composite materials (ACMs), which contain central cutouts. Based on the first-order shear deformation plate theory (FSDT), the Newmark method and Newton-Raphson iteration wereused for the nonlinear dynamic solution. The effects of the cutout sizes and lay-up sequences on the nonlinear dynamic response for various parameters werestudied using a nonlinear dynamic finite element program that was developed for this study. The several numerical results agreed well with those reported by other investigators for square composite plates with or without central cutouts, and the new results reported in this paper showed significant interactions between the cutout and the layup sequence in the laminate. Key observation points are discussed and a brief design guide for laminates with central cutouts is given.
Structural Performance and CO
Reduction Evaluation of the Ultra simple Wide-shaped section Beam-to-Column Weak Axis Connection
Kim, Sang-Seup ; Boo, Yoon-Seob ;
Journal of Korean Society of Steel Construction, volume 23, issue 5, 2011, Pages 615~627
There have been few researches on the connection technology for steel structures, so the research outputs and the outcome of the technology development are still insufficient. The bracket-type connection should be improved for efficient constructability and
reduction. It should be replaced by a new type of weak-axis connection that has better structural performance and less
emission. Since the structural performance and safety of the new type of weak-axis connection must first be verified, however, a study on
reduction will be conducted. Therefore, this study looked into the structural performance of the bracket-type details, standard details, and ultra-simple details. It evaluated the requirements for connection materials and
emission. It was found that the ultra-simple weak-axis connection has thebest structural performance and the least
emissions, so it is deemed capable of replacing the bracket-type weak-axis connection.
A Study on Self-Healing Bolted Joints using Shape Memory Alloy
Chang, Ha-Joo ; Lee, Chang-Gil ; Park, Seung-Hee ;
Journal of Korean Society of Steel Construction, volume 23, issue 5, 2011, Pages 629~636
This paper describes the smart structural system that uses smart materials for real-time monitoring and active control of bolted joints in steel structures. The impedance-based structural health monitoring (SHM) techniques, which utilize the electro-mechanical coupling property of piezoelectric materials, was used to detect loose bolts in bolted joints. By monitoring the measured electrical impedance and comparing it with the measured baseline, a bolt loosening damage was detected. The damage was evaluated quantitatively using the damage metrics in conductance signature with respect to the healthy states. When loosening damage was detected in the bolted joint, the external heater actuated the shape memory alloy (SMA) washer. Then the heated SMA washer expanded axially and adjusted the bolt tension to restore the lost torque. An experiment was conducted by integrating the piezoelectric-material-based SHM function and the SMA-based active control function on a bolted joint, after which the performance of thesmart self-healing joint system was investigated.
A Development of Prototype Design Automation System for Standard Connections Using High-Strength Bolts based on BIM
Eom, Jin-Up ; Shin, Tae-Song ;
Journal of Korean Society of Steel Construction, volume 23, issue 5, 2011, Pages 637~646
This study is related to the development of a design automation system for the construction design phase of steel structures. The system intended for beam splice friction connections using high-strength bolts. The standard design method and standardization principles that are suggested in the design manual for standard connections using high-strength bolts published by the Korean Society of Steel Construction(KSSC) were reviewed. A structural analysis algorithm was formulated from the review. A design automation system that can automatically calculate the structural design of connections and automatically generate the connection model without separate inputs was developed. To verify the validity of the developed system, its results were compared with the date in the table for the connection design in the Design Manual. The development system was also applied to the sample model. Then the structural design results were compared with the properties of the connection models and drawings created from the results.