Go to the main menu
Skip to content
Go to bottom
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
Editor in Chief :
Volume & Issues
Volume 11, Issue 4 - Dec 2011
Volume 11, Issue 3 - Sep 2011
Volume 11, Issue 2 - Jun 2011
Volume 11, Issue 1 - Mar 2011
Selecting the target year
Application of LRBs for Reduction of Wind-Induced Responses of Coupled Shear Wall Structures
Park, Yong-Koo ; Kim, Hyun-Su ; Ko, Hyun ; Kim, Min-Gyun ; Lee, Dong-Guen ;
Journal of the Korean Association for Spatial Structures, volume 11, issue 1, 2011, Pages 47~56
DOI : 10.9712/KASS.2011.11.1.047
In general, shear walls are employed as lateral resistance system. Most of shear wall structures require openings in shear walls and thus shear walls are linked by floor slabs or coupling beams resulting in the coupled shear wall structures. In this study, an LRB (lead rubber bearing) was introduced in the middle of the coupling beam of the coupled shear wall structures and the wind-induced response reduction effect of this system was investigated. In order to evaluate the control performance of the proposed method, 20- and 30-story building structures were used as example structures and boundary nonlinear time history analyses have been performed using artificial wind excitation. Japanese vibration evaluation criteria was employed to evaluate whether the proposed system could improve the serviceability of the tall coupled shear wall structures under wind excitation. Based on analytical results, it has been shown that the proposed method that connects shear walls with LRBs can improve the wind-induced response control effect.
Vertical Direction Redistribution of Beam Moments in the Seismic Design of RC Frame
Kim, Dae-Kon ;
Journal of the Korean Association for Spatial Structures, volume 11, issue 1, 2011, Pages 57~66
DOI : 10.9712/KASS.2011.11.1.057
For the lateral load resistance of a RC frame in a medium risk seismic zone, the strength of lower story beams and columns should be larger than those of the upper stories. However, the lateral loads can be accommodated by redistributing design beam moments vertically as well as horizontally so all beams end up with identical strengths. This paper looks at the impact of the vertical redistribution of beam moments to provide identical beam strength over as many floors as possible. Two-bay six-story RC frame was designed with and without vertical beam moment redistribution and its seismic performance were evaluated by using push-over limit analysis and by non-linear time history dynamic analysis. Analytical results show that with the use of vertical beam moment redistribution the increase in the ductility demand is similar to the proportion of moment redistribution applied, but this additional demand is below the ductility capacity of well detailed RC members.
The Effect of Sound Reinforcement Systems on the Acoustics of a Large-Span Spaces
Jeong, Dae-up ; Joo, Hyun-kyung ; Choi, Young-Ji ;
Journal of the Korean Association for Spatial Structures, volume 11, issue 1, 2011, Pages 67~75
DOI : 10.9712/KASS.2011.11.1.067
The present work investigate the effect of sound reinforcement systems on the acoustics of a large dome stadium using a computer simulation. The acoustics of a dome stadium was predicted analyzed by varying room absorption, as well as the configuration of speakers including their directivity, installed height, and numbers. It was found that both D50 and RASTI were improved by increasing room absorption. Larger EDTs were observed according to the increase of room absorption at mid and high frequencies. On the other hand, RT did not show any significant correlation with the changes in room absorption, which might be the effect of a forced linear fitting for non -linear energy decay process. With respect to the speaker configuration, the speech intelligibility of a sound reforcement system installed at higher placed more relied upon their directivity rather than room absorption, Also, lower placing of speakers was found to be effective in decreasing RTs regardless of room absorption.
Optimum Design of Grid Structures with Pretension
Kim, Dae-Hwan ; Lee, Jae-Hong ;
Journal of the Korean Association for Spatial Structures, volume 11, issue 1, 2011, Pages 77~85
DOI : 10.9712/KASS.2011.11.1.077
In this study, micro genetic algorithm is used to find an optimum cross section of grid structures with pretension. Design optimization of trusses consists of arriving at optimum sizes of cross-section and prestressing force parameters, when weight of the truss is minimum, satisfying a set of specified constraints. The present approach is verified by ten-bar truss example showing good agreements with previous results. Features of the proposed method, which help in modeling and application to optimal design of pretensioned truss structures, are demonstrated by solving a problem of seventy two bar truss structures. The minimum weight design of seventy two bar truss is performed for various magnitudes of pretension and optimal prestressing forces are also found for various configurations of pretensioned truss structures.
Finite Element Analysis of Inverted Umbrella-type Hyperbolic Paraboloid Shell
Kwon, Hung-Joo ; Yu, Eun-Jong ; Rha, Chang-Soon ;
Journal of the Korean Association for Spatial Structures, volume 11, issue 1, 2011, Pages 87~95
DOI : 10.9712/KASS.2011.11.1.087
This study presents the comparisons between the analysis results based on membrane theory and finite element analysis for the inverted umbrella-type hyperbolic paraboloid shell structure. The effects of the roof angle on the roof deflections, member forces of edge beams and ribs, and shell stress are also investigated with various roof angles. Results show that the membrane theory overestimates the member forces of edge beams and ribs. On the contrary, the shell stresses are underestimated in the membrane theory when compared to the results from the finite element analysis. The deflections of roof slabs by finite element analysis show drastic increasement as the roof angle decreases.
Deterioration Diagnosis of Surface and Coating Layer for Maintenance Managements of the Membrane Structure
Kang, Joo-Won ; Lee, Seung-Jae ;
Journal of the Korean Association for Spatial Structures, volume 11, issue 1, 2011, Pages 97~104
DOI : 10.9712/KASS.2011.11.1.097
This paper contains of descriptions of deterioration diagnosis of the surface and a coating layer for maintenance managements of large spatial structures with membrane structure. Membrane is a roofing material of the structures that its performance of durability including its performance of chemical resistance and corrosive resistance is considered to be highly important. In general, the items of diagnosis for maintenance managements such as membrane extensively include the diagnosis of deterioration of the membrane surface, of a coating layer of membrane, the diagnosis of deterioration between a coating layer and fiber, of overall surface of membrane, of the class of ropes, of reinforced belts, and of the cover of rubber. The object of this study that needs maintenance managements of the membrane with PVC and FIFE which are commonly used and shows the diagnosis results of deterioration of the surface and a coating layer.
A Study of Electronic Vehicle Charging Station Structure System Using PV(Photovoltaic) System
Lim, Jae-Hwi ; Yoon, Sung-Won ;
Journal of the Korean Association for Spatial Structures, volume 11, issue 1, 2011, Pages 105~112
DOI : 10.9712/KASS.2011.11.1.105
Fundamental Electric vehicle charge system is urgently needed for commercialization of electric vehicles. Car parking building is equipped with PV system for providing electricity to charge electric vehicles, because it must be charged at least for 30 minutes. In parking lots abroad, electric car charging stations are installed to charge electric cars by the electricity gained from PV systems which are also installed. Also, charge infrastructure construction plans and electric car charging facility support standards are being set and proposed, but there are no cases like abroad of electric car charging stations using PV systems and only electric car charging stations using ordinary electricity are being proposed. Therefore, this paper prepares establishment of domestic electric car charging networks. By researching inside outside solar parking lots and cases of abroad PV system electric car charging stations, and by analysis and comparative analysis of structural systems, structural material, and etc., many cantilever structure and small-size types were installed in PV system electric car charging stations.
Vibration Analysis of Space Structure with Retractable Roof
Kim, Gee-Cheol ; Kang, Joo-Won ; Kim, Hyun-Su ;
Journal of the Korean Association for Spatial Structures, volume 11, issue 1, 2011, Pages 113~120
DOI : 10.9712/KASS.2011.11.1.113
Retractable roof system is one of the special feature in stadium or complex structure. And this retractable roof system makes possible to use spacial structure all-weather. This retractable roof system is able to classified into overlapping, parallel movement and folding system. Moving load, impact load, inertial or braking loads, these dynamic loads induced by movements of retractable roof system. So it is necessary to analysis of spacial structures are subjected to these dynamic loads. Dynamic loads that are induced by the retractable roof movements can be applied to moving mass method or moving force method. But, moving force method is appropriate because the retractable roof movements is slow relatively. In this paper, new application method of moving forces induced by the retractable roof movements is proposed. And vibration analysis of spacial structures are executed by using the proposed method. This proposed equivalent moving force can be easily applied to spacial structure that is subjected to dynamic loads induced by movement of the retractable roof system.
A Study on the Critical Point and Bifurcation According to Load Mode of Dome-Typed Space Frame Structures
Shon, Su-Deok ; Kim, Seung-Deog ; Lee, Seung-Jae ; Kim, Jong-Sik ;
Journal of the Korean Association for Spatial Structures, volume 11, issue 1, 2011, Pages 121~130
DOI : 10.9712/KASS.2011.11.1.121
Space frame structures have the advantage of constructing a large space structures without column and it may be considered as a shell structure. Nevertheless, with the characteristics of thin and long term of spacing, the unstable problem of space structure could not be set up clearly, and there is a huge difference between theory and experiment. Therefore, in this work, the tangential stiffness matrix of space frame structures is studied to solve the instability problem, and the nonlinear incremental analysis of the structures considering rise-span ratio(
) and the ratio of load(
) is performed for searching unstable points. Basing on the results of the example, global buckling can be happened by low rise-span ratio(
), nodal buckling can be occurred by high rise-span ratio(
). And in case of multi node space structure applying the ratio of load(
), the nodal buckling phenomenon occur at low the ratio of load(
), the global buckling occur a1 high the ratio of load(
). In case of the global buckling, the load of bifurcation is about from 50% to 70% of perfect one's snap-through load.
Transmissibility Effect Evaluation of Buildings Near Railroad Areas
Kim, Ji-Hyeon ; Yoon, Sung-Won ;
Journal of the Korean Association for Spatial Structures, volume 11, issue 1, 2011, Pages 131~138
DOI : 10.9712/KASS.2011.11.1.131
For train vibration influence assessment of newly constructed buildings in building design levels, 4 train measured vibration acceleration responses were used to compare with TR theory values and suitability of TR values was proposed. Through this TR method, construction planned grounds located near railroad areas were selected and ground vibration measurement was conducted. Through natural frequency by MIDAS, vertical acceleration response, and ground frequency from measured vibration response, TR was calculated and vibration prediction was conducted. As a result of comparing acceleration response estimate applying TR and measured value of train vibration acceleration response, it was found that it was in 3.61%~37.1% of margin of error. Clear peak of 7.19~10.61Hz in KTX, Gyungeuisun, and cement train were confirmed.