• 한국공간구조학회논문집
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• 제19권4호
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• pp.35-44
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• 2019

Recently, the occurrence frequency of earthquake has increased in Korea, and many cultural assets have been damaged. Cheomseongdae is a valuable cultural assets that must be preserved historically and culturally. But, the masonry structure such as Chemseongdae is vulnerable to lateral forces. Therefore, in this study, structural modeling and dynamic analysis are performed to reflect the ground state and structural form of Cheomseongdae. Also, discrete element analysis technique is applied and dynamic behavior characteristics are analyzed according to earthquake load. For this purpose, displacements and stresses according to locations are reviewed and then swelling and distortion are analyzed.

• 한국주거학회논문집
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• 제21권6호
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• pp.71-80
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• 2010

The purpose of this study is to classify defects of the residential building by analyzing the defect specified by prequalification of residential building reconstruction and to suggest the solution of the problem which can be arisen during each stage of plan, construction and maintenance. By sorting the main defects which is specified by pre-qualification of residential building reconstruction for three years from August 2006 to August 2009 into 4 catagories and analyzing the cause of the defects, we draw the way of maintenance to prevent the defects and make pleasant residential environment. The reason for the frequent defects from residential building is mainly deterioration. It occured on the finishing more than on the structure, which means that residents can find defects easier on the finishing than the structure and clear the demand for repair. The result of analyzing of pre-qualification of residential building reconstruction is that the defects mostly caused small, masonry constructed and lower apartment. The apartment which is not into legal right for maintenance naturally have more defects than the others. In conclusion, it is necessary to establish a law of obligation duty of the maintenance of small apartment.

• 한국실내디자인학회논문집
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• 제19권5호
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• pp.3-10
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• 2010

In the history of art and architecture, there are different characteristics in relationship between light and space. Among them, two characteristics seem to be fundamental : The first is that contrast between light and darkness is more articulated. Direct sunlight penetrates into the dark interior space made by heavy masonry structure. This is generally found in the traditional western religious buildings. The second is that light is mixed with darkness and becomes shade. Shade is different from shadow that is usually perceived as the opposite of light. Sunlight is filtered under through the big horizontal roof and rice paper walls in the traditional far-east Asian architecture and becomes weak ambient light. In this shade, there is no strong contrast between light and darkness. This difference is not only originated from the architectural differences, but also originated from the conceptual differences about light, space, and the world in two cultures. This paper tries to study the philosophical, aesthetical backgrounds as well as case examples in art and architecture of two characteristics. Based on the case studies, this paper aims to analyze the main perceptual structure. Finding the relationship between light, space, and human body by making three dimensional models is the crucial analysis method of this research. Although in real life and experiencing the world, these two characteristics are not clearly separated, comparative study based on different cultures gives opportunity to think of diverse perspectives on light and space.

• 한국지반공학회논문집
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• 제27권9호
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• pp.25-36
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• 2011

조적식 석축옹벽의 거동 특성을 규명하기 위하여 실내 모형시험과 수치해석을 수행하였다. 실내 모형시험에서 옹벽 블록과 뒤채움재의 변위를 측정하기 위해 PIV 기법의 디지털 이미지 해석을 실시하였다. 유한요소 수치해석을 위해 상용프로그램인 ABAQUS를 사용하였다. 모형시험에서 관찰된 뒤채움재의 변위 발생 과정은 파괴면의 형성이 점진적임을 보여준다. 수치해석 결과에서 석축옹벽의 시공 과정에서 발생하는 전체적인 수평 토압 분포는 기존의 Rankine 이론과 큰 차이가 없지만, 뒤채움재의 내부 마찰각과 석축을 구성하는 석재 간의 마찰각이 작으면 토압의 분포가 불규칙해짐을 확인하였다.

• Computers and Concrete
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• 제13권5호
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• pp.603-619
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• 2014

Soft storey buildings are characterised by having a storey that has a large amount of open space. This soft storey creates a major weak point during an earthquake. As the soft stories are typically associated with retail spaces and parking garages, they are often on the lower levels of tall building structures. Thus, when these stories collapse, the entire building can also collapse, causing serious structural damage that may render the structure completely unusable. The use of special soft storey is predominant in the tall building structures constructed by several local developers, making the issue important for local building structures. In this study, the effect of the incorporation of an isolator on the seismic behaviour of tall building structures is examined. The structures are subjected to earthquakes typical of the local city, and the isolator is incorporated with the appropriate isolator time period and damping ratio. A FEM-based computational relationship is proposed to increase the storey height so as to incorporate the isolator with the same time period and damping ratio for both a lead rubber bearing (LRB) and high-damping rubber bearing (HDRB). The study demonstrates that the values of the FEM-based structural design parameters are greatly reduced when the isolator is used. It is more beneficial to incorporate a LRB than a HDRB.

• 한국지진공학회논문집
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• 제25권6호
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• pp.305-314
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• 2021

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.

• 대한건축학회논문집:계획계
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• 제34권1호
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• pp.15-22
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• 2018

Raymond, who adopted Le Corbusier's Errazuris House Project, built Karuizawa Villa by incorporating Japan's aspiration for Western modern architecture and strong convictions regarding the preservation of traditional culture heritage, which were prevalent in Japan at the time. Despite the controversy over his plagiarism, Karuizawa Villa shows several unique architectural characteristics. First, in terms of the arrangement and access system, the villa has a common space that affords a view of the lake by accessing from the mountain side. Second, in terms of spatial composition, the common space is connected to the mesonnette by placing a trail to enable enjoyment of natural scenery. In particular, personal space is planned in the shape of a cross by connecting several surfaces to the outside in order to secure enjoyment of the natural environment. Lastly, in the aspect of structure and materials, both architectural buildings adopted masonry by using natural stone as well as building materials suitable for each region and climate by using logs in constructing the main columns and beams. Through Karuizawa Villa, Raymond is considered to have established his own style by combining the standard of Western modern architecture and the elements of Japanese traditional architecture while valuing local architectural technology.

• 대한건축학회논문집:계획계
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• 제36권5호
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• pp.53-58
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• 2020

The purpose of this study is to build a database of Spatial information Bigdata of cities using satellite images and spatial information, and to examine the correlations with the surface temperature. Using architectural structure and usage in building information, DEM and Slope topographical information for constructed with 300 × 300 mesh grids for Busan. The satellite image is used to prepare the Normalized Difference Built-up Index (NDBI), Normalized Difference Vegetation Index (NDVI), Bare Soil Index (BI), and Land Surface Temperature (LST). In addition, the building area in the grid was calculated and the building ratio was constructed to build the urban environment DB. In architectural structure, positive correlation was found in masonry and concrete structures. On the terrain, negative correlations were observed between DEM and slope. NDBI and BI were positively correlated, and NDVI was negatively correlated. The higher the Building ratio, the higher the surface temperature. It was found that the urban environment DB could be used as a basic data for urban environment analysis, and it was possible to quantitatively grasp the impact on the architecture and urban environment by adding local meteorological factors. This result is expected to be used as basic data for future urban environment planning and disaster prevention data construction.

• 화약ㆍ발파
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• 제29권2호
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• pp.67-80
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• 2011

최근 노후화한 구조물 기능의 회복, 도시의 재개발, 부지의 유효이용 등을 배경으로 토목, 건축의 분야에 관계없이 구조물의 해체 요구가 늘어나고 있다. 과거 국내 Shell 구조물은 벽돌로 높이가 낮게 지어졌고, 이와 같은 해체 대상물을 효율적으로 해체한다는 것은 특별한 문제가 되지 않았다. 그러나 최근에는 높이가 높은 철근콘크리트 Shell 구조물이 해체대상이 되는 경우가 많아지고 있어 구조물을 얼마나 효율적인 해체할 것인가, 공사로 인한 진동, 소음 등의 환경에 미치는 영향을 얼마나 저감시킬 것인가라는 주요 관심사가 되고 있다. 이것을 해결하는 방법의 하나로 화약을 이용해 순간에 붕괴, 전도하는 발파해체공법이 있다. 본 논문은 제주특별자치도 제주시 삼양일동 900번지에 있는 제주화력발전소 내 기력 1호기 70m 높이의 연돌을 화약량 13.5kg과 전기뇌관 100개를 사용하여 원하는 방향으로 확실히 전도를 한 사례로 발파해체에 관한 계획에서부터 결과까지의 과정에 대해 기술하고자 한다.

• Structural Engineering and Mechanics
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• 제33권2호
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• pp.113-136
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• 2009

The seismic induced interaction between multistory structures with unequal story heights (inter-story pounding) is studied taking into account the local response of the exterior beam-column joints. Although several parameters that influence the structural pounding have been studied sofar, the role of the joints local inelastic behaviour has not been yet investigated in the literature as key parameter for the pounding problem. Moreover, the influence of the infill panels as an additional parameter for the local damage effect of the joints on the inter-story pounding phenomenon is examined. Thirty six interaction cases between a multistory frame structure and an adjacent shorter and stiffer structure are studied for two different seismic excitations. The results are focused: (a) on the local response of the critical external column of the multistory structure that suffers the hit from the slab of the adjacent shorter structure, and (b) on the local response of the exterior beam-column joints of the multistory structure. Results of this investigation demonstrate that the possible local inelastic response of the exterior joints may be in some cases beneficial for the seismic behaviour of the critical column that suffers the impact. However, in all the examined cases the developing demands for deformation of the exterior joints are substantially increased and severe damages can be observed due to the pounding effect. The presence of the masonry infill panels has also been proved as an important parameter for the response of the exterior beam-column joints and thus for the safety of the building. Nevertheless, in all the examined inter-story pounding cases the presence of the infills was not enough for the total amelioration of the excessive demands for shear and ductility of the column that suffers the impact.