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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
Test on the Mechanical Characteristics of Glass Fiber Membrane
Park, Kang-Geun ; Yoon, Sung-Kee ;
Journal of the Korean Association for Spatial Structures, volume 8, issue 2, 2008, Pages 55~62
Membrane structures are now used in various ways throughout the world with the merits of free shape, lightness, durability, sunlight transmittance and homogeneous material. The development of new membrane material opened up new possibility for the design of new building structures. Recently it was mainly used PVC, PVF, PVDF, PTFE, ETFE membrane for using the roofing material of membrane structures. Some problems of membrane materials have fire proofing, lack of strength, self cleaning capacity, tear resistance, durability, heat insulation, sound insulation and elasticity. For the solution of this problems, it will be tested the mechanical properties of membrane material about tensile strength, tearing resistance, etc.
Development of Measurement Equipment of Membrane Stress Using White Noise Sound Wave
Jin, Sang-Wook ; Ohmori, Hiroshi ; Kim, Jae-Yeol ;
Journal of the Korean Association for Spatial Structures, volume 8, issue 2, 2008, Pages 63~72
One of the most important matters in keeping membrane structures in healthy condition is to maintain the proper tension distribution over the membrane. However, it is not easy to know the real stress level in the membrane quantitatively after completion of the structures. Authors suggested measurement method that can measure membrane stress using sound wave, and have been holding experimental tests of membrane stress measurement that used the sound external excitation with sine wave and white noise. The concept of the method is the fact that measurement of resonance frequency by vibrating membrane having rectangular boundary by audible frequency can measure membrane stress indirectly. In this paper, through the experimental tests it is proved that the equipment can be used for not only the membrane material of type A but also for types B and C. In addition, it is proved that the developed measurement equipment is available to stably measure the membrane stress which exists in the membrane material of the actual membrane structures.
The Seismic Behavior of the Truss-Arch Structure with Seismic Isolation
Kim, Gee-Cheol ; Kim, Kwang-Il ; Kang, Joo-Won ;
Journal of the Korean Association for Spatial Structures, volume 8, issue 2, 2008, Pages 73~84
The various systems as the seismic resistance systems are used to reduce the seismic response of structure. And the seismic isolation system among them is the system that reduces the seismic vibration to be transmitted from foundation to upper structure. The purpose of isolation system is to lengthen the period of structure and make its period shift from the dominant period of earthquake. In this study, the seismic behavior of arch structure with lead rubber bearing(LRB) and friction pendulum system(FPS) is analyzed. The arch structure is the simplest structure and has the basic dynamic characteristics among large spatial structures. Also, Large spatial structures have large vertical response by horizontal seismic vibration, unlike seismic behavior of normal rahmen structures. When horizontal seismic load is applied to the large spatial structure with isolation systems, the horizontal acceleration response of the large spatial structure is reduced and the vertical seismic response is remarkably reduced.
Seismic Evaluation of Beam-Column Joint Specimens of RC Special Moment Frames
Lee, Ki-Hak ; Seok, Keun-Yung ; Jung, Chan-Woo ; Shin, Young-Shik ; Kang, Joo-Won ;
Journal of the Korean Association for Spatial Structures, volume 8, issue 2, 2008, Pages 85~93
This study summarizes the results of a research project aimed at investigating the inelastic rotation capacity of beam-column joints of reinforced concrete special moment frames. All of the test specimens were classified as special moment frame (SMF), based on the design and detailing requirements of the ACI 318-02 provisions. The acceptance criteria, originally defined for steel moment frame connections in the 1997 edition of the AISC Seismic provisions, were used to evaluate the beam-column joints of the reinforced concrete moment frames. A total of 39 test specimens were examined in detail. Most of the joints that satisfy the design requirements for special moment frame structures were found to be ductile up to a plastic rotation of 3% without any major degradation in strength. This is mainly due to the stringent ACI 318-02 requirements for special moment frame joints. The presence of transverse beams increases confinement and shear resistance of joints, which results in better performance than for joints without transverse beams. All of the SMF connections that satisfy the ACI 318-02 limitations on joint shear stress turned out to meet the acceptance criteria.
Comparison of Damping Ratios by Half Power Bandwidth Method and Synchronized Human Excitation
Yoon, Sung-Won ;
Journal of the Korean Association for Spatial Structures, volume 8, issue 2, 2008, Pages 95~103
This paper is concerned with the damping ratios of two methods, which are frequency domain and time domain approach. Ambient vibrations and synchronized human excitation test were conducted to three reinforced concrete buildings ranging from eleven to nineteen stories. The performance of the half power bandwidth method was investigated using three kinds of sample size, 1024, 2048, and 4096. The damping ratio by synchronized human excitation ranges from 1.05% to 1.22% in the long direction and from 1.16% to 1.50% in short direction. Damping by half power bandwidth method is slightly more overestimated than the synchronized human excitation due to insufficient record length. Damping evaluation by half power bandwidth method was found to be enhanced by using the narrower bandwidth with long recorded data.
A Study on Optimum Shape Finding of Shell-Typed Structures
Kim, Seung-Deog ; Lee, Shin-Woo ;
Journal of the Korean Association for Spatial Structures, volume 8, issue 2, 2008, Pages 105~113
Shell-typed structures can make resistance to external forces efficiently, and have merits to construct the large-span structures with thin thickness. This merits are highly depending on the shape of structure. Therefore designers want to the optimum shape, but it is not so easy to find the shape. So far there are many schemes to find more optimum shape, and those methods have their own characteristics. In this study, the authors introduce a relatively easy approach to find optimum shape by the finite element method considering geometric nonlinearity. We are finding the optimum shape of a shell-typed structure using line elements, and compared the results by various analytic models.