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스페이스 프레임 돔 구조물의 최적화를 위한 형상생성 방안
김호수(Kim Ho-Soo),박영신(Park Young-Sin),양명규(Yang Myung-Kyu),이한주(Lee Han-Joo) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.12
Space frame system is applied to various parts of large spatial dome structures. Especially, space frame dome structure is composed of traditional shape or the combinations of various shapes and new design. In this case, the big difference in the total weight and behavior of structures is shown, based on the selection of space frame dome structure and the difference of member connection, even if they have same size and height. For this reason, it is not easy to decide the optimal shape in the design of this system. Therefore, this study presents the shape generation method and then try to develop the shape generation module. To this end, the node and member generation technique is formulated to consider the characteristics of shapes through the various example selection of space frame dome structure. Also, various example models are presented for efficiency evaluation of the shape generation technique and optimization results are compared through the application of optimization algorithm.
스페이스 프레임 돔 구조물의 형태생성 및 강성최적화 이력에 따른 구조성능 분석
김호수,박영신,이민호,오주영,Kim, Ho-Soo,Park, Young-Sin,Lee, Min-Ho,Oh, Ju-Young 대한건축학회 2012 대한건축학회논문집 Vol.28 No.1
Space frame structures have the different shapes according to generation principle and member connection method. Thus, space frame dome structures need the optimal shape design method according to requirements. The optimal design method for space frame structures generally adopts the size and shape optimization method that aims at optimal weight. This optimization method shows the results which consider the minimum weight with appropriate shapes from stress and displacement constraints. But, it is not easy to secure the maximum stiffness of structure because the optimal weight design is established by the given constraint conditions. Therefore, this study finds out the optimal structural shape that has the maximum stiffness through the stiffness optimization method. To this end, we first select the various types of space frame dome structures and generate the dome structure shapes using VBA(Visual Basic for Application). Also, we consider the various load conditions and perform the optimal stiffness design for the performance comparison of dome structures. In this way, the total weights and displacements are evaluated during the stiffness optimization process according to the height variations of dome structures.
김호수(Kim, Ho-Soo),김재윤(Kim, Jae-Yoon),박영신(Park, Young-Sin),정성진(Jung, Sung-Jin),김왕직(Kim, Wang-Jik),김덕문(Kim, Derk-Moon) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.10
The traditional fortress structures have the various construction types in the shapes, slopes and infilled materials. Also, we should consider the various applied load conditions as design variables, and then check the dicontinuum behavior characteristics for the reasonable structural modelling and analysis of fortress structure. Therefore, this study selects the representative fortress structure, and then performs the structural modelling considering the various construction shapes and slope variations. Especially, this study evaluates the structural behaviors according to the construction types of fortress structures by comparing the stress and displacements through the discrete element analysis.
김호수,김동관,전건우,Kim, Ho Soo,Kim, Dong Kwan,Jeon, Geon Woo 한국지진공학회 2021 한국지진공학회논문집 Vol.25 No.6
The Gyeongju and Pohang earthquakes caused damages to many cultural properties; particularly, stone pagoda structures were significantly damaged among masonry cultural properties. To preserve these structures, it is necessary to understand their dynamic behavior characteristics under earthquakes. Analyses on such areas as deformation, frequency, maximum acceleration, permanent displacement, sliding, and rocking have to be performed. Although many analytical studies have already been conducted, dynamic behavior studies based on experiments are insufficient. Therefore, this study analyzed dynamic behavior characteristics by performing a shaking table experiment on a three-story stone pagoda structure at the Cheollongsa temple site damaged by the Gyeongju earthquake. As a result of the experiment, the displacements of stylobates did not occur significantly, but the tower body parts rotated. In particular, the rotation of the 1F main body stone was relatively larger than that of the other chief body stones because the 1F main body stone is relatively more slender than the other parts. In addition, the decorative top was identified as the component most vulnerable to sliding. This study found that the 1F main body stone is vulnerable to rocking, and the parts located on the upper part are more vulnerable to sliding.
위상 및 크기 최적화를 고려한 대공간 철골트러스 구조물의 형상결정 방안
김호수(Kim Ho-Soo),양명규(Yang Myung-Kyu),박영신(Park Young-Sin),이한주(Lee Han-Joo) 대한건축학회 2010 大韓建築學會論文集 : 構造系 Vol.26 No.2
It is very important to find out the initial shape for the efficient design of spatial steel truss structure. Also, the reasonable optimization techniques are required in order to perform the optimal design of the structure. Traditionally, the structural design process starts with an initial conceptual model which is inspired by the designer's intuition and previous experiences. So, this study is to provide the information about the optimum layout of structure through the integrated process for the initial topology and final size optimization. To this end, this study finds out the initial optimum layout of spatial steel truss structure by using the topology optimization for unit structure model, and then decides the final optimal shape by using the size optimization for the total structure combined with several unit models.
김호수(Kim Ho-Soo),홍석일(Hong Souk-Il),신효범(Shin Hyo-Bum) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.4
Stone pagoda structure is largely classified into three parts such as top, body and stylobate. Specifically, the reduction of stylobate's bearing capacity has great influence on the structural safety of stone pagoda structure because the stylobate is performing the role of foundation. Therefore, this study evaluates the structural safety of stone pagoda according to the layout types of stylobate's jeoksim. These layout types are classified into stacking form, column form+stacking form and rod-like rock column form based on the construction types of stylobate. Also, the soil loss phenomenon of stylobate is applied for the safety analysis of the structure. For the structural modeling and analysis of stylobate part, discontinuum models and discrete element analysis method are considered.
김호수(Kim Ho-Soo),차근창(Cha Geun-Chang),정성진(Jung Sung-Jin),김왕직(Kim Wang-Jik),배병선(Bae Byung-Sun),김덕문(Kim Derk-Moon) 대한건축학회 2012 大韓建築學會論文集 : 構造系 Vol.28 No.9
The construction types of the arched stone bridges show generally the semi-circled shapes. But, the several types have been constructed by considering the height-width ratios according to the installation locations. The arched stone bridges with the various arched types have the different load transfer mechanism and show the different structural behavior according to the axis variation. Therefore, this study analyzes the mechanical behavior characteristics according to the various arched types and applies the discrete element method for the modelling and analysis of discontinuum structure.
김호수,김동관,전건우,Kim, Ho-Soo,Kim, Dong-Kwan,Jeon, Geon-Woo 한국공간구조학회 2020 한국공간구조학회지 Vol.20 No.4
In case of stone pagoda structures, the various construction types appear, and various damages occur due to exposure to the outdoors for a long time. Such damages can be classified into non-structural damages and structural damages. However, studies for the effects of structural damages on stone pagoda structures are insufficient. Accordingly, this study intends to perform structural modeling and structural analysis according to structural damages of stone pagoda structure, and to perform risk analysis through the fragility curve. So, we expects that this study gives a great contribution to the preservation and maintenance of stone pagoda structures under the various structural damages.
김호수(Kim, Ho-Soo) 대한건축학회 2013 大韓建築學會論文集 : 構造系 Vol.29 No.7
Recently, the interests for the earthquake disaster reduction of stone pagoda structure have been increased. So, the seismic performance evaluation is required according to the construction types and seismic intensity. But, it is not easy to apply the general structural analysis because of the difference in the masonry structural characteristics of stone pagoda structure. Therefore, this study presents the reasonable seismic performance evaluation method for the stone pagoda structure. To this end, the seismic loads are generated according to seismic return period and then the dynamic behavior characteristics are evaluated through the structural modelling and analysis.
기단부 및 옥개석 보강형식에 따른 석탑구조물의 구조적 특성평가
김호수(Kim Ho-Soo),홍석일(Hong Souk-Il),신효범(Shin Hyo-Bum) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.3
We have many difficulties in evaluating efficiently the structural behavior of stone pagoda because of the particular mechanical characteristics of the discontinuum structures such as masonry stone pagodas. To this end, the discontinuum modelling and discrete element analysis technique are needed for the structural safety evaluation of these structures in preserving and restoring the historical stone pagodas. Therefore, to evaluate the structural characteristics and safety of stone pagoda considering the reinforcement types of stylobate and roof stone, we select the stone pagoda in Gameunsa temple site as the typical model, and analyzes this structural model through the discontinuum modelling and analytical method under several design variables.