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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Association for Spatial Structures
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Journal DOI :
Korean Association for Spatial Structures
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Volume & Issues
Volume 8, Issue 6 - Dec 2008
Volume 8, Issue 5 - Oct 2008
Volume 8, Issue 4 - Aug 2008
Volume 8, Issue 3 - Jun 2008
Volume 8, Issue 2 - Apr 2008
Volume 8, Issue 1 - Feb 2008
Selecting the target year
A Study on the Environment-Friendly Factors of Domestic and Foreign Domed Stadiums
Kim, Dong-Woo ; Seok, Ho-Tae ; Yang, Jeong-Hoon ;
Journal of the Korean Association for Spatial Structures, volume 8, issue 3, 2008, Pages 37~44
The purpose of this study is to derive a basic data for environment-friendly factors and design methods which is applicable to domestic domed stadium. Thus this study carry out environment-friendly factors in domestic and foreign domed stadiums through the case studies. And these are divided into 3 parts; energy, indoor environment and material & resource. Also this study analyzed environment-friendly factor application characteristics which is related its space size and climate.
A Study on the Behavior & Buckling Characteristics of Single-Layer Latticed Domes in the Erection Process
Jung, Hwan-Mok ; Kim, Cheol-Hwan ; Hwang, Dong-Gyu ;
Journal of the Korean Association for Spatial Structures, volume 8, issue 3, 2008, Pages 45~51
A single layer-latticed dome is advantageous for large span structures because it is very stiff despite the light weight of the structure itself. However, this structure becomes easily unstable during erection due to its large size. The Block method is popular with the large span structures. A partial block of the dome is fabricated on the ground and lifted by crane to a designated location of structures. The lifting point selection is very important to create a stable erection and to avoid buckling of members during the erection. The purpose of this study is to analyze the structural behaviors and buckling characteristics according to the lifting point of single-layer latticed domes with triangle network in order to take materials about the safe and economic erection. The conclusions are obtained as follow. 1) The buckling strength of the block part varies with the location of lifting points when it is erected. In case, the height of the dome is lower, the effort of buckling strength of the structure is higher. 2) In buckling strength, the effect of the lifting rope length is smaller than it of the lifting points change.
A Study on the Reverberation Characteristics of Coupled Spaces
Jeong, Dae-Up ; Kim, Ji-Young ; Choi, Young-Ji ;
Journal of the Korean Association for Spatial Structures, volume 8, issue 3, 2008, Pages 53~63
In this study, the reverberation characteristics of coupled spaces were investigated using a scale model. Two rooms were connected through an acoustically transparent opening known as an aperture. The acoustic characteristics of the coupled room by varying three parameters, the aperture opening size, the absorption ratio between the two rooms and the locations of the secondary room, were measured and analysed. The results indicated that a reverberant secondary room, produced large variations of the acoustics in the main room and an absorptive secondary room was effective to provide systematic control of the acoustics in the main room. The reverberant secondary room should be located at the rear of the stage and the aperture opening ratio over 6.25% produced large variations of the acoustics in the main room. However, the aperture opening ratio over 25% had no effect on variations of the acoustics in the main room. The absorptive secondary room should be located at the rear of the audience areas and the aperture opening ratio over 3.13% produced large variations of the acoustics in the main room.
A Subjective Study on the Reverberation Characteristics of Coupled Spaces
Jeong, Dae-Up ; Choi, Young-Ji ;
Journal of the Korean Association for Spatial Structures, volume 8, issue 3, 2008, Pages 65~73
The present work deals with subjective assessments to propose the objective parameter related to the subjective attribute of reverberation in the coupled room varied the aperture opening size. A 1/10 scale model was built and used for the measurements and subjective assessments. For the subjective tests, binaural impulse responses(BIRs) were measured using a dummy head and the measured BIRs were convolved with anechoic recorded music for the presentation over the headphones. The results showed that the perceived reverberation was the largest in the aperture opening size 12.5%(1.97% of mail) room surface area)and decreased with increasing the aperture opening size over 25% (3.94% of main room surface area) in the main room coupled with the secondary reverberant room. In the main room coupled with the secondary absorptive room, there was no changes in the perceived reverberation up to the aperture opening size 6.25%(0.99% of main room surface area) and it gradually decreased with increasing the aperture opening site over 12.5%. The objective parameter, T30/T15, showed a very low correlation with the perceived reverberation in the coupled room varied the aperture opening size but showed a high correlation with a new objective parameter, T30/Tbp, proposed by the authors. Because the late part decay energy more rapidly increases with increasing the aperture opening site than the early and middle part decay energy, the LDT/EDT or T3/T1 is a better quantifier to measure double slopes in the coupled room than the T30/T15.
Direction Vector for Efficient Structural Optimization with Genetic Algorithm
Lee, Hong-Woo ;
Journal of the Korean Association for Spatial Structures, volume 8, issue 3, 2008, Pages 75~82
In this study, the modified genetic algorithm, D-GA, is proposed. D-GA is a hybrid genetic algorithm combined a simple genetic algorithm and the local search algorithm using direction vectors. Also, two types of direction vectors, learning direction vector and random direction vector, are defined without the sensitivity analysis. The accuracy of D-GA is compared with that of simple genetic algorithm. It is demonstrated that the proposed approach can be an effective optimization technique through a minimum weight structural optimization of ten bar truss.
Computational Modelling Method by Using the Dynamic Characteristics of Stone Masonry Arch Bridges
Lee, Sung-Min ; Park, I-Sun ; Choi, Hee-Soo ; Choi, Chui-Kyoung ;
Journal of the Korean Association for Spatial Structures, volume 8, issue 3, 2008, Pages 83~90
It is hard to predict the mechanical characteristics of discontinuous stone masonry structures by the static analysis method, because of irregularity of face stones and also due to randomness of backfill materials. Inversely, one can estimate the mechanical characteristics by comparing the natural frequencies between measured and computed. The aim of this paper is to investigate the computational modeling method of ancient stone arch bridges in Korea and to find the factors influencing their dynamic characteristics. The results revealed that the rigidity of spandrel walls and backfill materials are the most important factors influencing the natural frequencies of stone arch bridges.
Compressive Strength of Diagrid Node Using H-Shape Steel
Ju, Young-Kyu ; Park, Soon-Jeon ; Kim, Kyoung-Hwan ; Chang, In-Hwa ; Kim, Sang-Dae ;
Journal of the Korean Association for Spatial Structures, volume 8, issue 3, 2008, Pages 91~99
As number of the buildings increases, it shows new trends such as twisted, tilted, taperer shape. As a structural solution for the new trend buildings, diagonal grid (Diagrid) structure was developed. Though a few buildings was built using diagird system, the structural performance of the corresponding node was not clearly identified. Therefore, experimental evaluation is needed to apply diagrid for higher buildings. In this study, the node was tested depending on the amounts of welding materials. As a result, the partial welding can provide enough strength for the node as required in the full penetration welding under monotonin compressive loadings.