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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 13, Issue 4 - Dec 2013
Volume 13, Issue 3 - Sep 2013
Volume 13, Issue 2 - Jun 2013
Volume 13, Issue 1 - Mar 2013
Selecting the target year
Smart Microvibration Control of High-Tech Industry Facilities using Multi-Objective Genetic Algorithm
Kim, Hyun-Su ; Kang, Joo-Won ; Kim, Young-Sik ;
Journal of the Korean Association for Spatial Structures, volume 13, issue 2, 2013, Pages 37~45
DOI : 10.9712/KASS.2013.13.2.037
Reduction of microvibration is regarded as important in high-technology facilities with high precision equipments. In this paper, smart control technology is used to improve the microvibration control performance. Mr damper is used to make a smart base isolation system amd fuzzy logic control algorithm is employed to appropriately control the MR damper. In order to develop optimal fuzzy control algorithm, a multi-objective genetic algorithm is used in this study. As an excitation, a train-induced ground acceleration is used for time history analysis and three-story example building structure is employed. Microvibration control performance of passive and smart base isolation systems have been investigated in this study. Numerical simulation results show that the multi-objective genetic algorithm can provide optimal fuzzy logic controllers for smart base isolation system and the smart control system can effectively reduce microvibration of a high-technology facility subjected to train-induced excitation.
An Analysis of Mechanical Features and Variations of Design Composition Elements for Pratt Trusses
Park, Chan-Soo ; Lee, Ju-Na ;
Journal of the Korean Association for Spatial Structures, volume 13, issue 2, 2013, Pages 47~55
DOI : 10.9712/KASS.2013.13.2.047
The design composition elements and the mechanical behavior of trusses have been investigated for Pratt trusses. As a result, it was determined that the design composition elements of the trusses consist of the composition of webs, the distance between joints, the chords profile, the depth of the truss, and the double chord composition. In addition, by analyzing models with a variation of elements, comprehensive features of structural behavior have been presented for variations of design of Pratt trusses. This is to provide more effective and useful design information on truss structure in the architectural and structural planning stage.
Experimental Investigation of Rotation-Up Erection for Keel Truss Spatial Structures
Kim, Cheol-Hwan ; Chae, Won-Tak ; Baek, Ki-Youl ; Jung, Hwan-Mok ;
Journal of the Korean Association for Spatial Structures, volume 13, issue 2, 2013, Pages 57~66
DOI : 10.9712/KASS.2013.13.2.057
There are a number of construction methods to build spatial structures such as erection method, Element method, Block method, Sliding method, Lift-up method and Push-up method. These methods are uneconomical and low accuracy, and require long construction duration because of a need of a scaffold or a tower crane to build spatial roof frame. In this study, the construction method to erect a truss structure was proposed as an economical and easy installation method. The proposed method has end hinges of keel truss and winches with horizontal cable. This method makes safe and accurate production and reduces construction duration because trusses are built on the floor or supporter. The goal of this study is to verify the validity of construction method by building scale model using the proposed method.
Characteristics of Wind Pressure Distributions Acting on Solar Collector Plate
You, Ki-Pyo ; Kim, Young-Moon ; You, Jang-Youl ;
Journal of the Korean Association for Spatial Structures, volume 13, issue 2, 2013, Pages 67~73
DOI : 10.9712/KASS.2013.13.2.067
This paper attempted to bridge this gap by identifying the number of flat-plate solar collectors. The characteristics of wind pressure coefficients acting on flat-plate solar collectors which are most widely used were investigated for various wind direction. Findings from this study found that the location where the maximum wind pressure coefficient occurred in the solar collector was the edge of the collector. Regarding the characteristics according to the number of collectors, the paper found that downward wind pressure coefficient of the lower edge of the collector was higher than the upward wind pressure coefficient of the upper edge of the collector in the basic module (1 piece). However, as the number of collectors increases, the upward wind pressure coefficient of the upper edge become higher than the downward wind pressure coefficient of the lower edge. Finally yet important, it was found that the location of the maximum wind pressure coefficient was changed according to the number of solar collectors.
Determination of Member Force Ratios for Self-equilibrium State of Multi-Layered Cable Dome Type Structures
Kim, Jae-Yeol ;
Journal of the Korean Association for Spatial Structures, volume 13, issue 2, 2013, Pages 75~82
DOI : 10.9712/KASS.2013.13.2.075
For each cable component in a cable dome structure, pre-tension is needed for stability of whole the structure. The summation of these pre-tension at each joint should be zero to achieve the self equilibrium structure. The first step in cable dome structure analysis is to find the ratio of pre-tension in each member which can produce a stable and structure on self-equilibrium. In this paper, a new method based on the basic principle of closed force polygon for equilibrium system is proposed for the determination of self-equilibrium mode of cable dome structure. A single layer cable dome and two multi layer type domes have been analyzed. The ratios of cable members are determined by the presented method, and check the validation of the results by numerical calculation.
Experimental Study of Strength and Ductility on Masonry Wall Frame and Shear Wall Frame Subjected to Cyclic Lateral Loading
Lee, Ho ; Byeon, Sang-Min ; Jung, Hwan-Mok ; Lee, Taick-Oun ;
Journal of the Korean Association for Spatial Structures, volume 13, issue 2, 2013, Pages 83~91
DOI : 10.9712/KASS.2013.13.2.083
The core aim of this dissertation is to empirically scrutinize a strength characteristic of beam-column frame subjected to the cyclic lateral load, a beam-column frame of un-reinforced masonry wall, and a shear wall frame. First and foremost, I embark upon making three prototypes vis-
-vis this research. By conducting this process, I touch on an analysis of cyclic behavior and a damage characteristic of the beam-column frame, the beam-column frame of un-reinforced masonry wall, and the shear wall frame. What is more, through the previous procedure, the next part delves into the exact stress transfer path and the destructive mechanism to examine how much and how strong the beam-column frame of un-reinforced Masonry Wall does have a resistance capacity against earthquake in all the architecture constructed by the above-mentioned frame, as well as school buildings. In addition to the three prototypes, two more experimental models, a beam-column frame and shear wall frame, are used to compare with the beam-column frame of un-reinforced masonry wall. Lastly, the dissertation will suggest some solutions to improve the resistance capacity against earthquake regarding all constructions built with non bearing wall following having examining precisely all the analysis with regard to not only behavior properties and the damage mechanism of the beam-column frame and the beam-column frame of un-reinforced Masonry Wall but also the resistance capacity against earthquake of non bearing wall and school buildings.
The Study on New Residential Welfare Space to Housing Stabilization for Urban Low-income Group - Focused on Spatial Consideration of Farm Housing Facilities -
Park, Byong-Gyu ;
Journal of the Korean Association for Spatial Structures, volume 13, issue 2, 2013, Pages 93~99
DOI : 10.9712/KASS.2013.13.2.093
Korea has been striving for the development of the nation in various aspects. It will also have to make an effort for its continued development in the future. The problems of low-income groups that occur in those processes cannot be simply ignored now. It is needed to provide an equal opportunity to low-income groups so that they can be part of the society. The cycle of economic problem should be disconnected through this process. Farm-Housing is one of the solutions to this problem. Its purposes are not only to provide residence in the complex, but to gain income through various activities, such as production, distribution and consumption, and solve part of the economic problems of the people living in the Farm-Housing. To sell the products of Farm-Housing, the neighboring cities need to be designated as a hinterland. For this reason, Farm-Housing needs to be located in the suburban area of large cities. However, the current laws and policies make it difficult to construct Farm-Housing in suburban areas. Presenting plans to solve such problem is the purpose of this paper.
The Research of Existing Traffic Safety Facilities Condition for Enhancing in School Zone Safety
Park, Byong-Gyu ;
Journal of the Korean Association for Spatial Structures, volume 13, issue 2, 2013, Pages 101~109
DOI : 10.9712/KASS.2013.13.2.101
Children are out future society members but they are not well cared to be safe from various accidents. This is due to facilities were installed upon the children`s for adults which can not provide safe traffic environment for children`s schooling who are not fare enough experience and matured. "The Rule of declaim for school zone and it`s Management"was established in the year 1995 based on the article 11 by the "Road Traffic Low". And 15,136 school zone declared by the above rule. In this study, four elementary schools located in Nowon-gu are selected and analyzed about state of elementary school, scope of school zone, installation of street furniture, and safety signs. The analysis showed that scope of school zone is currently set in 150-meter though the regulation is within 300-meter radius. Therefore, expansion of the scope is required. It is necessary to take control of vehicle during commuting times and holograms which can be noticed in school zone have to be installed as well. Through these improvements, safety zone will be offered to children effectually.