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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 12, Issue 4 - Dec 2012
Volume 12, Issue 3 - Sep 2012
Volume 12, Issue 2 - Jun 2012
Volume 12, Issue 1 - Mar 2012
Selecting the target year
Mesh Refinement for Isogeometric Analysis and Post-Processing
Kim, Jee-In ; Luu, Tuan Anh ; Lee, Jae-Hong ; Kang, Joo-Won ;
Journal of the Korean Association for Spatial Structures, volume 12, issue 2, 2012, Pages 45~53
DOI : 10.9712/KASS.2012.12.2.045
This paper derives Isogeometric analysis and post-processing method of surface that are generated by NURBS basis function for accurate geometric modeling and structure analysis of free-form. By deforming these parameters that are consisted of control points, knots, polynomial, variable geometric models are derived. The basis function that is used to Isogeometric analysis is same to the basis function of NURBS that is used to generate geometric models. For performing isogeometric analysis, h-p-k refinement is performed without changing of original geometry. To visualize the results of isogeometric analysis that control points' displacements, post-processing method that is the interface method between IGES format and Rhinoceros is derived.
The Study of Reinforcement through the Nonlinear Static Analysis and Inelastic Seismic Performance Evaluation in School Building
Lee, Ho ; Kwon, Young-Wook ; Kim, Hong-Do ;
Journal of the Korean Association for Spatial Structures, volume 12, issue 2, 2012, Pages 55~63
DOI : 10.9712/KASS.2012.12.2.055
This study is about earthquake-proof reinforcement through structural function evaluation of an school building. The purpose of this study is to comparatively analyze structure reinforcement measures in consideration of safety and usability through structural function evaluation of school buididng, to offer rational measures for earthquake-proof function and to provide help in maintaining safe structures against earthquake. For this purpose, was selected for this study as an existing school building, earthquake-proof function evaluation was conducted, and measures to reinforce earthquake-proof function was offered. As for the research method, the first and the second earthquake-proof function evaluations were conducted which is an existing reinforced concrete school building. Through the abovementioned methods, earthquake-proof function evaluation were conducted, the results were analyzed and the measure to reinforce earthquake-proof function were offered(Steel damper, Carbon plate stiffeners). The offered measure to reinforce earthquake-proof function was applied to the subject structure, and comprehensive results were derived from earthquake-proof function evaluation regarding before and after earthquake-proof function reinforcement.
Control of the Eccentric Building Using a TMD with Torsional Rigidity
Park, Yong-Koo ; Kim, Hyun-Su ; Lee, Dong-Guen ;
Journal of the Korean Association for Spatial Structures, volume 12, issue 2, 2012, Pages 65~72
DOI : 10.9712/KASS.2012.12.2.065
In this stury, control performance of tuned mass damper (TMD) with torsional rigidity for an eccentric structure showing torsional responses is investigated. To this end, an eccentric structure subjected to earthquake excitation is used to evaluate the control performance of torsional TMD by varying installed location and torsional rigidity of TMD, To reduce computational time required for repetitive time history analysis of an example structure having non-proportional damping system due to TMD, an equivalent analytical model is used in this study. Torsional properties of TMD usually neglected in typical TMD are verified to be effective in reduction of torsional responses of the eccentric structure. In the case of eccentric structures, it has been seen that the center of a plane of a structure may not be optimal location of TMD.
Analysis on the Risk of Explosive Terror in Domestic Buildings
Song, Jin-Young ; Yoon, Sung-Won ;
Journal of the Korean Association for Spatial Structures, volume 12, issue 2, 2012, Pages 73~80
DOI : 10.9712/KASS.2012.12.2.073
According to the global status of terroristic acts occurred from 2002 to 2010, 10,431(nearly 52.2%) of 19,946 cases have happened by bomb blasts, and 10,431(nearly 52.2%) of weapons used for terrorism were explosive substances Therefore, this study analyzed the terrorism risks of buildings according to height through FEMA 455 - rapid visual screening. As a result, the higher the building is, the higher the terror risk gets. It shows that total risk increases proportionally to buildings's height. In case of buildings over 100 meter high, the total risk is most affected by threat items. According to the risk of explosion associated with the scenario analysis, buildings over 100 meter high have high risks of Internal-Explosive.
Equilibrium Stress Mode Determination of Tensegrity Structure by CAD
Kim, Jae-Yeol ;
Journal of the Korean Association for Spatial Structures, volume 12, issue 2, 2012, Pages 81~88
DOI : 10.9712/KASS.2012.12.2.081
Cable dome structures are composed of cables-masts and the cables should be in pre-tension since a structure without pre-tension is not stable. Under the pretension, self equilibrium stress state is the main characteristic of a cable dome structure. 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. The proposed method which is called geometric method has the unique characteristic of visualization of the force mode needed for maintenance of self-equilibrium. The basic theory for a self equilibrium of structure is that the summation of forces at each joint without any external load should be zero. The simplicity of the method which involves only drawing close polygon with the aid of suitable CAD software has been illustrated by means of a example. The results compared with mechanical calculation and existed method and shows good agreement.
Optimum Structural Design of Space truss with consideration in Snap-through buckling
Shon, Su-Deok ; Lee, Seung-Jae ; Choi, Jae-Hyun ;
Journal of the Korean Association for Spatial Structures, volume 12, issue 2, 2012, Pages 89~98
DOI : 10.9712/KASS.2012.12.2.089
This study investigates the optimum structural design of space truss considering global buckling, and is to obtain the minimal weight of the structure. The mathematical programming method is used for optimization of each member by member force. Besides, dynamic programming method is adapted for consideration in snap-through buckling. The mathematical modeling for optimum design of truss members consists of objective function of total weight and constrain equations of allowable tensile (or compressive) stress and slenderness. The tangential stiffness matrix is examined to find the critical point on equilibrium path, and a ratio of the buckling load to design load is reflected in iteration procedures of dynamic programming method to adjust the stiffness of space truss. The star dome is examined to verify the proposed optimum design processor. The numerical results of the model are conversed well and satisfied all constrains. This processor is a relatively simple method to carry out optimum design with consideration in global buckling, and is viable in practice with respect to structural design.
Microvibration Control of High Technology Facilities Subjected to Train-induced Excitation using Smart Base Isolation
Kim, Hyun-Su ; Kang, Joo-Won ; Kim, Young-Sik ;
Journal of the Korean Association for Spatial Structures, volume 12, issue 2, 2012, Pages 99~108
DOI : 10.9712/KASS.2012.12.2.099
Microvibration problem of high-technology facilities, such as semi-conductor plants and TFT-LCD plants, has been considered as important factors that affects the performance of products and thus it is regarded as important in facilities with high precision equipments. In this paper, various base isolation control systems are used to investigate their microvibration control performance. To this end, 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. Based on numerical simulation results, it has been verified that smart base isolation system can control microvibration of a high-technology facility subjected to train-induced excitation.
A Study on the Dynamic Instability Characteristics of Latticed Domes Under Sinusoidal Excitations
Kim, Seung-Deog ; Kang, Joo-Won ; Jang, Je-Pil ;
Journal of the Korean Association for Spatial Structures, volume 12, issue 2, 2012, Pages 109~118
DOI : 10.9712/KASS.2012.12.2.109
Few paper deal with the dynamic bucking under the load with periodic characteristics, and the behavior under periodic excitation is expected the different behavior against STEP excitation. A space frame structure has high stiffness with a structure resisting external forces in steric conformation. According to many structural conditions, structural stability problems in the space frame are determined and considered very important. This study seeks to understand the space frame collapse mechanism using the 2-free nodes truss model in order to examine static structural instability characteristics of the latticed dome. According to geometrical shape, the star dome, parallel lamella dome and three way grid dome were selected as models. The models were examined for characteristics of instability behavior according to rise-span ratio(
) and shape imperfection.