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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Association for Spatial Structures
Journal Basic Information
Journal DOI :
Korean Association for Spatial Structures
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Volume & Issues
Volume 7, Issue 6 - Dec 2007
Volume 7, Issue 5 - Oct 2007
Volume 7, Issue 4 - Aug 2007
Volume 7, Issue 3 - Jun 2007
Volume 7, Issue 2 - Apr 2007
Volume 7, Issue 1 - Feb 2007
Selecting the target year
A Fundamental Study of Performance Based Seismic Design on the Large Span Structures: The Characteristics of Elasto-Plastic Earthquake Responses of a Steel Frame with Membrane Roof
Nakazawa, Shoji ; Cheong, Myung-Chae ; Kato, Shi ; Yoshino, Tatsuya ; Oda, Kenshi ;
Journal of the Korean Association for Spatial Structures, volume 7, issue 2, 2007, Pages 35~44
The characteristics of elasto-plastic responses of a gymnasium building which is a steel braced frame with membrane roof is discussed as a basic research on the performance based seismic design of large span structures, in this paper. Under the strong earthquake motions, the formation of plastic hinges on braces attached by the bottom frame make reduce down the stresses and displacements of upper structures, and vertical acceleration of the membrane is tend to increase but maximum response of strain and corresponding stresses are tend to be reduced.
Structure and Form Derived from Folding; from Pleated Shape to Deployable Structure
Park, Sun-Woo ; Choi, Sun-Young ; Choi, Chui-Kyung ;
Journal of the Korean Association for Spatial Structures, volume 7, issue 2, 2007, Pages 45~52
The purpose of this study is to explore folding as a tool diversifying structures and shapes or forms, and to consider the role and possibilities as structural design sources. First, the morphological characteristics and the elements for transforming pattern of folding are investigated and the way of forming space is also shown. Secondly, the application methods and systems of folding are descrived.
A Control Method of Semi-active TMD for Vibration Control
Lee, Ki-Hak ; Kim, Gee-Cheol ; Lee, Eun-Suk ;
Journal of the Korean Association for Spatial Structures, volume 7, issue 2, 2007, Pages 53~61
A conventional passive TMD is only effective when it is tuned properly. In many practical applications, inevitable off-tuning of a TMD occurs because the mass in a building floor could change by moving furnishings, people gathering, etc. When TMDs are offtuned, TMDs their effectiveness is sharply reduced. Moreover, the off-tuned TMs can excessively amplify the vibration levels of the primary structures. This paper discusses the application of a new class of MR damper, for the reduction of floor vibrations duo to machine and human movements. The STMD introduced uses a MR damper called to semi-active damper to achieve reduction in the floor vibration. Here, the STMD and the groundhook algorithm are applied to a single degree of freedom system representative or building floors. The performance or the STMD is compared to that or the equivalent passive TMD. In addition, the effects of off-tuning due to variations in the mass of the floor system. Comparison of the results demonstrates the efficiency and robustness of STMD with respect to equivalent TMD.
A Study on the Influence of a supporting structure on the Seismic Response of a Roof Structure
Jung, Chan-Woo ; Kang, Joo-Won ;
Journal of the Korean Association for Spatial Structures, volume 7, issue 2, 2007, Pages 63~74
Large spatial structures consist of roof structure and its supporting structure. Authors simply call the supporting structure "lower parts" and roof structure "upper parts". To study the influence of an lower part on the seismic response of the upper part of a structure as a first step, authors substitute the upper part and the lower part of the structure to a single degree of freedom system individually, and set up a new 2 DOF structural model connected by them. It is clarified that the mass ratio and the period ratio of an upper part to a lower part are important parameters to find the amplification or reduction of the seismic response of an upper part.
Analysis on the Construction Cost of Steel Truss Stadium
Jang, Myung-Ho ; Sur, Sam-Yeol ;
Journal of the Korean Association for Spatial Structures, volume 7, issue 2, 2007, Pages 75~82
Building costs means capital costs which include cost of land, cost of acquiring and preparing the site, construction costs, engineering fees, furnishings, cost of financing the project, and cost of management required to run and maintenance the building for use. An economic analysis is one of the most important factor to determine the project feasibility. The purpose of the this study is to analysis on the construction cost structure of steel truss stadium.
A study on improved analytic method for the bond stress between concrete and steel tube in CFT column
Seok, Keun-Yung ; Ju, Gi-Su ; Choi, Joon-Young ; Chae, Seoung-Hun ; Kang, Joo-Won ;
Journal of the Korean Association for Spatial Structures, volume 7, issue 2, 2007, Pages 83~90
Buildings become high and large. CFT(Concrete Filled steel Tube) columns have been developed to manage effectively that loads which columns support and cross sections of columns are increased. Because CFT column is the composite structure made of two different materials, many researches have been performed to look into mechanical behaviors. This study is an analytic study about bond stress on interface between concrete core and steel tube in circular and rectangular CFT columns. ABAQUS/Standard Version 5.8 is used to analyze bond stress by bond form and position of shear-connector, and improved analystic method about mechanical characters on interface is suggested.
An Analytical Study on the Optimum Application of Diaphragm in Circular Steel Piers
Jang, Gab-Chul ; Chang, Kyong-Ho ;
Journal of the Korean Association for Spatial Structures, volume 7, issue 2, 2007, Pages 91~96
To improve the land use of urban, Construction of the circular steel column is required recently. The circular steel columns have a advantage for improving a load carrying capacity as wall as reducing a effective section area. However, the circular steel columns under service load, such as earthquake, shows a tendency to cause local buckling and large deformation. To prevent these phenomena, use of diaphragm is considered. It is reported that longitudinal stiffeners has a effect on improving a buckling and fatigue performance of steel structures. The research of effect on diaphragm is not sufficient. Under monotonic and cyclic loadings diaphragm make a important role to prevent local buckling and deformation of used steel structures. Therefore, influence of diaphragm on performance of used steel structures is investigated. In this study, the influence of diaphragm on seismic and deformation performance of circular steel piers was investigated by using elastic-plastic finite element analysis considered geometrical and material non-linearity. The seismic performance of circular steel columns was evaluated for analytical parameter of manufactured part. The seismic performance of circular steel columns was clarified by comparing an energy dissipation of circular steel piers.
The Case Study on the Erection Method of Large Span Structures
Jung, Hwan-Mok ; Lee, Seong-Yeun ; Jee, Suck-Won ;
Journal of the Korean Association for Spatial Structures, volume 7, issue 2, 2007, Pages 97~104
Recently, the demand of the large span structures has been increasing. The large span structures include such a large scaled structures such as: the shell structure, the space frame structure, the membrane structure and the cable structure, etc. The large span structures are supposed to be confirmed and issued carefully at the initial process of the design besides the construction engineering aspects because of the structural specific cause that should solve and accomodate those large and wide space without columns. In the field of the large span structure construction, the erection construction method has been regarded as a major affected aspects on the construction cost, construction term, and stability. In the field of the large span structure construction, there are various construction method and system could be applied depends on the condition of the construction site and other circumstances such a major construction method as: the element method, the block method, the sliding method, the lift-up method and complexed method, etc. In this study, as the case study of the erection construction method of the large span structures, after survey and study that those existing large span structures construction cases which had applied and adopted the election construction method and analysis and classify into the Uoups by the size, span, ceiling height, structural system in odor to supply and suggest the data for the enhancement and development in the field of the erection construction method as a efficient structural solution of the large span structure construction.
Acoustic characteristics of sound field in partially opened rooms - Emphasis on horizontal coupling of diffuse and non-diffuse field -
Jeong, Dae-Up ; Choi, Young-Ji ; Kim, Ji-Young ; Oh, Yang-Ki ; Choi, Seok-Ju ;
Journal of the Korean Association for Spatial Structures, volume 7, issue 2, 2007, Pages 105~114
Large span spaces have been widely used for various purposes including sports events in other countries. Due to increasing demands on multi-purpose use of such spaces, recently built large span sport facilities such dome stadiums have been required to accommodate sport events as well as performing events. Also, retractable ceilings and/or walls were generally adopted in those spaces for providing various event conditions. It seems obvious that the openings between diffuse fields and free field may cause difficulties in the acoustic design of such spaces In the present work, the acoustic characteristics of non-diffuse field has been investigated using 1/10 acoustic scale models. It was found that RTs at low- and mid-frequencies decayed faster than those at high-frequencies as the percentage of opening area increased. The decay rate of RTs at high frequencies were not influenced by increasing the area of an opening. Also high dependence of EDT on the percentage of opening area was observed at all frequency range. D50 was not improved by increasing the area of an opening up to 12.5% and then sharply increased. The application of Schroeder integration to evaluate the reverberation charateristics of coupled spaces may not be proper, since non-exponential decay process with double or triple decays of those spaces can not be properly defined. EDT seems more appropriate to predict reverberation at the early acoustic design stage of acoustically coupled spaces.
A Study on the Shape-Decision Technique of Membrane Structures According to the Design Process and Shape Analysis
Park, Sun-Woo ; Kim, Seung-Deog ; Shon, Su-Deok ; Jeong, Eul-Seok ;
Journal of the Korean Association for Spatial Structures, volume 7, issue 2, 2007, Pages 115~124
The initial shape is arrived at by a self-formation process, which accomplishes a form in the natural world, or is determined analytically by considering the equilibrium of initial stress only. Therefore, the self-formation process, which accomplishes a form in the natural world is grasped and the types of modeling techniques available to find the shapes of soft structures are well investigated and classified. To establish a form-finding modeling techniques, the models of string, soap film, fabric, rubber, plaster, and etc. are used. These modeling techniques can be used as a method of understanding the characteristics of structures when the material of model shows similar characteristics. Generally, the model test confirms the structure based on numerical analysis, at the same time it is important preceding process to develop such a program. With the above process, the relationship between model test and numerical analysis becomes a feedback process. Therefore, in this study, two examples which have been accomplished from such a technique are investigated and considered according to modeling process.