• Journal of Korean Association for Spatial Structures
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• v.7 no.4
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• pp.97-104
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• 2007

This paper is concerned with the vibration characteristics of medium-rise building, which severely vibrated by vehicles. The field vibration measurement was employed for finding the vibration source and vibration reducing method. Time domain data from measurements were also utilized for vibration characteristics, such as effect of buses and subways-induced vibration on the floor vibration of the building. effectiveness of the vibration reducing method was also demonstrated.

• Journal of architectural history
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• v.24 no.3
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• pp.17-29
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• 2015

This study is about the change of multi-storied buildings in Hanyang, the capital city of Joseon Dynasty. The changes are divided into 3 phases in the viewpoint of architectural types and building types. The first phase is from the early Joseon Dynasty to the time of Japanese invasion to Korea and Sungryemun remains until now. The second phase is from 1592 to the the first half of the 18th century. Many multi-storied Buddhist halls were rebuilt at that time. In the final phase, many multi-storied gate buildings and multi-storied main buildings of palaces were rebuilt. And there are differences between the Buddhist buildings and the main buildings of palaces. By the way the change that architectural style of the Buddhist buildings and the main buildings of pal were switched and mixed occurred. For example, Anguksa Daeungjeon adopted the style of multi-storied gates and Injeongjeon adopted the style of multi-storied Buddhist halls. These phenomenon was result from periodical situation the monk carpenter and his disciple took part in governmental construction like Janganmun.

• Journal of the Korea institute for structural maintenance and inspection
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• v.23 no.5
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• pp.96-103
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• 2019

Middle-rise reinforced concrete residential buildings account for a large portion of the Korea, and structural performance analysis are needed for problems that could occur during the construction of such buildings. Thus, a middle-rise reinforced concrete residential building with 25 stories are selected as a sample model for structural performance analysis. The structural analyses are performed by dividing a sample model into the construction stage models of the 5th, 10th, 15th, 20th and 25th floors and the completion stage models with the design completed. For the comparisons of structural performances, Eigenvalue analysis results and lateral-load-resisting capabilities and structural design performances of structural members are analyzed. As a result of analyses, it was confirmed that both the construction and completion stage do not exceed KBC criteria limits at the lateral displacement and story drift ratio, and structural design performances of structural members confirm structural safety in all components except for some members of the wall. Therefore, it was concluded that if structural stability is obtained during the completion stage of a middle-rise reinforced concrete residential building, structural stability is secured under construction.

• Journal of the Korea institute for structural maintenance and inspection
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• v.26 no.1
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• pp.39-48
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• 2022

In earthquake situations, broadcasting and communication services are directly linked to rapid on-site rescue and effective restoration works. Recently, a variety of base isolation devices are widely introduced on building floors to avoid critical seismic damages of telecommunication facilities. However, in buildings with long fundamental periods, those devices may have undesirable amplification of seismic responses due to resonance effect between the building floors and base isolation devices. This study performs the seismic safety evaluation of two types of base isolation devices deployed for telecommunication facilities in mid- and high-rise buildings through numerical and experimental approaches. It is found that mid- and high-rise buildings can have low-frequency dynamic responses at the top floor when being subjected to design basis earthquake loading. Furthermore, bi-directional shake table testing demonstrated that the selected base isolation devices can exhibit unstable dynamic behaviors under such low-frequency excitations of the floor.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.31 no.3
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• pp.114-121
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• 2013

Gwaneumhyeonsanggi is a writing of praise of the incarnated White-robed Gwanseumbosal by Choi Hang which King Sejo witnessed at the top of Damhwajeon during his visit to Sangwonsa Temple. In Gwaneumhyeonsanggi, White-robed Gwaneumhwahyeondo drawn by a painter is attached, which demonstrate the feature of Sangwonsa temple in the early Joseon period. This study aimed to examine the landscape features of Sangwonsa in the early Joseon period by records and picture in Gwaneumhyeonsanggi. As a result, it was determined that the building display, spatial structure, building type and landscape arrangement seemed to be unique compared with other temples. In particular, the treatment of scenic stone(景石) is important in terms of landscape because it complements existing ideas and concepts that the temple landscape was mainly made of water as the main resources. Also the trees around the temple shown in the picture in can be compared with the current state of the data is valuable.

• Korean Journal of Heritage: History & Science
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• v.48 no.2
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• pp.120-141
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• 2015

This paper is a preliminary study of architectural characteristics of Jangdae (general's podium), which shows one of the technical changes in fortification of Joseon Dynasty. As a facility for commands of generals and training for officers and men, it was located inside a fortress. Although it is not certain when the first Jangdae was built, the number of them dramatically increased around 18th century. Since the top priority function of the Jangdae was the prospect, it was installed at the hilly spot with open architecture. In addition, the open structure of Eupseong fortress towers on the riverside banks could simultaneously offer the functions as viewing around and Jangdae. Since Jangdae was also a place for military drills and reviews of soldiers, a wide podium was positioned at the front to muster the soldiers. This feature was standardized in the space organization of Jangdae in Joseon, and a mere podium was installed unless the topographic restrictions allows enough space. On the other hand, as a place for a commander, the hierarchy of the Jangdae was revealed through a variety of architectural characteristics. The hierarchy was assigned to the commander's space through the altitude difference, and diverse ornaments were added to show a sense of class. The floor plan of the Jangdae building can be largely categorized into rectangle and square, and the typical sizes of the former are $5{\times}4$ Kans (traditional measuring unit between two columns) and $3{\times}2$ Kans. Out of these two types, buildings of $5{\times}4$ Kans were found in flat land and eupseong fortresses with large space, and the relatively smaller ones of $3{\times}2$ Kans in mountain fortresses. All buildings of square floor plan had $3{\times}3$ Kans style, and the center Kan was twice wider than the side Kan to make the central space wide. It seems that the purpose was to secure the interior space of the upper story because the center Kan accounts for the floor area of the upper story. Some Jangdae's had internal story to form overhead space. The multi-roofed tower style with eaves attached to the upper and lower story is found exclusively in Jangdae. The buildings shows the Onkanmulim style which extends Naejinju (inner column) of the lower story to be the Byeonju (outer column) of the upper story, and the log-framed floor in the upper floor was structured by inserting the Changbang (connecting beam) between the Naejinju's and joining the log frames. In addition, the towers in eupseong fortresses had log-framed floor in the upper floor by setting up the high Nuhaju (column underneath a roof) and joining Cheongbang to the upper part of the column while it cannot be regarded as multi-roofed because only the upper part has a roof.

• Journal of the Korea institute for structural maintenance and inspection
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• v.26 no.2
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• pp.43-50
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• 2022

Even though the structural safety is confirmed in the design stage, the structural safety is not guaranteed in the construction stage because the structural system is not completed. In addition, since the construction period is shorter than the period of use of the building after completion, it is excessive to apply the same seismic load to the construction stage as in the design stage. ASCE 37-14 presents the concept of seismic load reduction factor during construction, but does not provide a clear application method. Therefore, in this study, the seismic load reduced according to the return period was applied to the example model of a residential middle-rise RC building. The construction stage of the example model was divided into five-story units, and seismic load with the change of the return period was applied to the construction stage models to analyze the change of seismic load during construction and to check the sectional performances of structural members. By comparing the design strength ratio of the shear wall at the design stage and the construction stage, the range of seismic load magnitudes that can assure the safety during construction of a residential middle-rise RC building was analyzed in terms of the return period.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.24 no.6
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• pp.629-636
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• 2011

It has been suggested that buildings designed for strong ground motions will also have improved resistance to air blast loads. As an initial attempt to quantify this behavior, the responses of a ten story steel building, designed for the 1994 building code, with lateral resistance provided by perimeter moment frames, is considered. An analytical model of the building is developed and the magnitude and distribution of blast loads on the structure are estimated using available computer software that is based on empirical methods. To obtain the relationship between pressure, time duration, and standoff distance, these programs are used to obtain an accurate model of the air blast loading. A hemispherical surface burst for various explosive weights and standoff distances is considered for generating the air blast loading and determining the structural response. Linear and nonlinear analyses are conducted for these loadings. Air blast demands on the structure are compared to current seismic guidelines. These studies present the displacement responses, story drifts, demand/capacity ratio and inelastic demands for this structure.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.37 no.1
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• pp.17-24
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• 2024

This paper assesses the structural performance of the Daeungbojeon Hall of Magoksa in Gongju, a representative multi-tiered roof traditional timber structure from the Joseon Dynasty, under vertical loads. Employing midas Gen, a structural analysis software, we developed a three-dimensional analysis model closely resembling the actual structure. Static analysis was employed to evaluate the safety and serviceability of the main vertical and horizontal members under vertical loads. While all members met the safety and serviceability criteria, structural weaknesses were identified in the Daelyang of the lower floor, particularly as a transitional beam, necessitating improvement. For the evaluation of dynamic behavior characteristics, eigenvalue analysis was conducted, assuming a relative rotational stiffness of 5% at the main joints. The natural period was determined to be 1.105 seconds, placing it within the category of a Hanok of similar size. The first mode manifested as a translational movement in the forward and backward direction of the building.

• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.1302-1306
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• 2007

여름철의 강우시 저수지에 주로 유입되는 고탁수층은 저수지내의 수체에 대하여 밀도차와 유속차를 가지며, 난류혼합을 일으키면서 주변수를 유입하며 하류방향으로 이송 확산되어 간다. 임하댐과 같은 대형 저수지는 수심이 30 m가 넘는 관계로 여름철에 2개의 수온약층이 존재한다. 따라서 댐체에 도달한 고탁수층은 저수지내의 밀도성층으로 인하여 주로 중층에 분포하게 되며, 가을철에 발생하는 수평확산과 전도현상으로 인해 저수지 전역에 분포하게 되어 탁질입자의 분포에 따라 탁수현상의 장기화를 유발하기도 한다. 이와 같은 탁수문제의 저수지내 대책으로는 홍수기에 고탁수층을 우선적으로 취수하는 방법이 있다. 고탁수층은 이와같이 수온약층과 밀접한 관계를 가지며, 취수탑 주변의 선택취수 결과에 영향을 받는다. 형성된 탁수층을 효율적으로 선택배제하기 위해서는 취수시설에 접근하는 성층흐름을 정확하게 이해해야 한다. 본 연구에서는 3차원 CFD를 사용하여 밀도성층에 따른 취수탑 주변의 접근흐름을 수치해석하여 방류수심, 방류유속 및 밀도성층구조의 선택배제에 대한 영향을 분석하였다. 임하댐 취수설비에 적용한 결과에 의하면 상층, 중층, 하층에서 취수탑 문비를 개도하였을 경우, 취수탑 주변에서만 유속이 증가하였을 뿐 저수지 내에서는 유속이 크게 증가되지 않은 것으로 나타났다. 하지만 문비 개도구간의 변화에 따라 수심별 유속분포는 크게 변화하는 것을 확인할 수 있다. 따라서 문비를 조절하는 것은 저수지 전체의 유동을 깨뜨리지 않으면서 취수탑 인근에서 선택취수가 가능하다는 것을 확인할 수 있었다. 또한 본 연구에서는 정밀한 현장조사를 수행하여 저수지와 방류수의 탁도변화를 모니터링하였으며, 취수탑 개구부 주변의 연직 유속분포를 측정하였다. 3차원 수치모의 결과와 현장에서 관측한 유속장을 비교함으로써 본 연구에서 제시한 실제 탁수배제능력을 검증하였다.를 구축하였다는데 의의가 있다.로와 접하는 건물의 경우 모서리부 광고 효과가 지배적이며 대부분 곡선돌출형이 사용되고 있었다. 그러므로 모서리 저층부를 필로티로 계획하여 보행흐름을 원활하게 하고 대신 입면을 투명하게 하여 간접광고(내부전시) 효과를 유도하는 것이 좋다. 특히 원형모서리는 건물 특화 성격이 강하므로 불가피할 경우 소형 액센트 광고 위치를 미리 벽면으로 할애하는 것이 경관 및 입면계획에 유리한 것으로 분석되었다. 불확실도 해석모형 등의 새로운 기능을 추가하여 제시하였다. 모든 입출력자료는 프로젝트 단위별로 운영되어 data의 관리가 손쉽도록 하였으며 결과를 DB에 저장하여 다른 모형에서도 적용할 수 있도록 하였다. 그리고 HyGIS-HMS 및 HyGIS-RAS 모형에서 강우-유출-하도 수리해석-범람해석 등이 일괄되게 하나의 시스템 내에서 구현될 수 있도록 하였다. 따라서 HyGIS와 통합된 수리, 수문모형은 국내 하천 및 유역에 적합한 시스템으로서 향후 HydroInformatics 구현을 염두에 둔 특화된 국내 수자원 분야 소프트웨어의 개발에 기본 토대를 제공할 것으로 판단된다.았다. 또한 저자들의 임상병리학적 연구결과가 다른 문헌에서 보고된 소아 신증후군의 연구결과와 큰 차이를 보이지 않음을 알 수 있었다. 자극에 차이가 있지 않나 추측되며 이에 관한 추후 연구가 요망된다. 총대장통과시간의 단축은 결장 분절 모두에서 줄어들어 나타났으나 좌측결장 통과시간의 감소 및 이로 인한 이 부위의 통과시간 비율의 저하가 가장 주요하였다. 이러한 결과는 차가운 생수 섭취가 주로 결장 근위부를 자극하는 효과를 발휘하는 것이 아닌가 해석된다. 이와 같은 연구결과를 통해 생다시마를 주원료로 개발된 생다시마차와 생다시마 음료가 만성 기능성 변비 증세를 개선하는 효능이 잠재적으로 있음을 확인하였다. 그러나 생약제재의 변비약 수준으로