• Journal of the Korean Wood Science and Technology
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• 제44권2호
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• pp.264-273
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• 2016

The insulation of a building envelope influences the hygrothermal performance as well as the thermal performance of the building. While most of Korean wood frame houses have an interior insulation system, the exterior insulation system with high thermal performance has recently been applied. While it can be effective in energy savings for better insulation performance, without consideration of the moisture, condensation and mould growth can occur. Therefore, in this study, hygrothermal behaviour, water content, and mould growth were analyzed using hygrothermal simulation of an exterior wall of a wood frame house with which the interior insulation and exterior insulation systems were applied. The wall layer included Wall A (Interior insulation) and Wall B (Exterior insulation). The U-values were identified as 0.173 and $0.157W/m^2K$, respectively. The total water content and OSB absolute water content of Wall A were confirmed to be higher than those of Wall B, but the absolute water content did not exceed the reference value of 20%. The moisture content of the two walls was determined to be stable in the selected areas. However, mould growth risk analysis confirmed that both Wall A and Wall B were at risk of mould growth. It was confirmed that as the indoor setting temperature decreased, the mould index and growth rate in the same area increased. Therefore, the mould growth risk was affected more by indoor and outdoor climate conditions than by the position of the insulation. Consequently, the thermal performance of Wall B was superior to that of Wall A but the hygrothermal performances were confirmed to be similar.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2018년도 춘계 학술논문 발표대회
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• pp.101-102
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• 2018

There is a risk that the damage caused by frequent earthquakes can lead to the risk of personal injury due to cracks in buildings and collapse of major structures. Although the seismic design of the new building is designed to be reinforced, the existing structure is not exposed to the risk of earthquake. Therefore, it is aimed to develop the steel frame type CFT composite method which can easily reinforce the CFT structural system with excellent seismic performance against the old non - seismic structure.

• Structural Engineering and Mechanics
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• 제63권1호
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• pp.115-124
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• 2017

In this paper, a different technique to predict the effects of soil-structure interaction (SSI) on seismic response of building systems is investigated. The technique use a machine learning algorithm called Support Vector Regression (SVR) with technical and analytical results as input features. Normally, the effects of SSI on seismic response of existing building systems can be identified by different types of large data sets. Therefore, predicting and estimating the seismic response of building is a difficult task. It is possible to approximate a real valued function of the seismic response and make accurate investing choices regarding the design of building system and reduce the risk involved, by giving the right experimental and/or numerical data to a machine learning regression, such as SVR. The seismic response of both single-degree-of-freedom system and six-storey RC frame which can be represent of a broad range of existing structures, is estimated using proposed SVR model, while allowing flexibility of the soil-foundation system and SSI effects. The seismic response of both single-degree-of-freedom system and six-storey RC frame which can be represent of a broad range of existing structures, is estimated using proposed SVR model, while allowing flexibility of the soil-foundation system and SSI effects. The results show that the performance of the technique can be predicted by reducing the number of real data input features. Further, performance enhancement was achieved by optimizing the RBF kernel and SVR parameters through grid search.

• 한국지진공학회논문집
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• 제6권1호
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• pp.55-62
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• 2002

상부벽식-하부골조 구조(복합구조)는 일반적으로 전이층을 중심으로 상부는 주거공간의 전단벽식의 고층아파트이고 하부는 상업공간의 보-기등의 골조구조이다. 이러한 구조물은 구조형식의 특성상 강성비정형, 질량비정형, 기하학적 비정형 등 비정형 형태의 특징을 갖고 있다. 본 연구에서는 하부골조 구조물의 층수가 변화할 경우에 대해 복합 구조물의 비선형 거동특성과 내진성능을 파악하였다. 비선형 해석결과로부터 얻은 결론은 다음과 같다. 1) 비선형 정적해석의 최상층변위각과 밑면전 단력계수로부터 하부구조의 층수가 증가할 경우 구조물의 밑면전단력계수는 감소하였으나 최상층변위각은 증가하였다. 2) 하부구조의 층수가 증가할 경우 상부벽식구조의 층간변위각과 소성율은 감소하였으며, 상부벽식은 탄성상태에 가까운 거동을 하였다. 3) 하부구조의 층수가 증가할 경우 하부구조에서 층간변위각이 집중적으로 증가하였다.

• 한국지진공학회논문집
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• 제9권5호
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• pp.11-19
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• 2005

건축 구조물의 내진 설계는 탄성 정적 방법에 기초하고 있으나, 강진시 구조물의 실제 거동은 비탄성 동적이기 때문에 설계 규준의 적합성을 판단하기 위해서는 비탄성 동적 해석이 요구된다. 본 논문에서는 철근 콘크리트 특수 모멘트 저항 골조 건물을 선택하여 IBC 2003에 따라 설계한 후, 선택된 부재들의 최대 소성 회전, 소산 에너지를 구하여, 건물의 비탄성 거동이 규준에서 의도한 거동을 보이는 지를 검토함과 동시에 층간변위률 요구값을 구하여 설계 한도를 만족하는 지를 조사하였다. 더불어 비횡력 저항 시스템인 내부 모멘트 저항 골조의 해석시 포함 여부의 영향도 함께 조사하였다. 해석 결과 IBC 2003에 의해 설계된 건물은 규준이 의도한 비탄성 거동을 보여주었으며 층간변위률 또한 설계한도를 만족하였다. 그리고, 내부 모멘트 저항 골조는 지진 해석 결과에 중요한 영향을 미치므로 해석 모델에 반드시 포함되어야 함을 알수 있었다.

• 콘크리트학회논문집
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• 제26권3호
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• pp.351-360
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• 2014

이 연구의 목적은 감쇠시스템 설계 시 ASCE7-10의 등가선형해석과 응답스펙트럼해석의 설계절차 및 비선형해석에 간략화된 등가프레임모델을 제안하여, 선형 및 비선형 해석 시 소모되는 시간을 줄이고 해석 조건 및 변수조건을 다양화함으로 감쇠시스템 적용 시 효과를 합리적으로 검토하는데 있다. 이 연구에서는 최근에 이슈화 되고 있는 공동주택의 감쇠시스템 도입과 관련하여 ASCE7-10의 성능기반 내진설계를 근간으로 내진성능평가 및 감쇠시스템 설계를 비선형응답이력 해석을 통하여 수행하였다. 특히 공동주택 대상건물을 건축구조기준의 75% 지진력 수준으로 최적화 설계 시 내진성능평가를 수행하여 안전성을 검토하는 한편, 기준에 제시된 지진력 수준으로 내진설계 시 골조물량을 비교 하여 경제성을 검토하였다. 또한, 대상건물에 외부제어 이력형 감쇠장치를 적용 시 제안한 프레임 등가모델을 이용하여 ASCE7-10 감쇠시스템 설계를 수행하였으며 Full Scale Model에서 그 제어효과를 검증하였다.

• Structural Engineering and Mechanics
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• 제46권5호
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• pp.645-672
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• 2013

The differential settlements and rotations among footings cannot be avoided when the frame-footing-soil system is subjected to seismic/dynamic loading. Also, there may be a situation where column(s) of a building are located near adjoining property line causes eccentric loading on foundation system. The strap beams may be provided to control the rotation of the footings within permissible limits caused due to such eccentric loading. In the present work, the seismic interaction analysis of a three-bay three-storey, space frame-footing-strap beam-soil system is carried out to investigate the interaction behavior using finite element software (ANSYS). The RCC structure and their foundation are assumed to behave in linear manner while the supporting soil mass is treated as nonlinear elastic material. The seismic interaction analyses of space frame-isolated footing-soil and space frame-strap footing-soil systems are carried out to evaluate the forces in the columns. The results indicate that the bending moments of very high magnitude are induced at column bases resting on eccentric footing of frame-isolated footing-soil interaction system. However, use of strap beams controls these moments quite effectively. The soil-structure interaction effect causes significant redistribution of column forces compared to non-interaction analysis. The axial forces in the columns are distributed more uniformly when the interaction effects are considered in the analysis.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2008년도 춘계 학술논문 발표대회
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• pp.27-30
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• 2008

For the purpose of developing economical and time-efficient formwork for Top-down construction, a Non-Supporting Form System has been proposed. The system is consisted of two parts: a hanging part to support a steel frame and a section of concrete slab, and the other hanging part to lower the steel frame. In this paper, the proposed system is compared to two existing systems of Non Supporting Top-down Method and Bracket Supported R/C Downward Method. It is expected that this system can be used in Top-down construction with further development.

• 건축역사연구
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• 제9권3호
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• pp.51-69
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• 2000

This study tries to analyze the development of architectural technologies appeared in several tall buildings and large spatial structures from 1955 to 1999 in Korea. We suppose that these buildings represent the development of technology in Korean modern architecture. By the detailed analysis of these buildings, we can arrive at a conclusion as such; During the years 1955-1999, there existed a great changement in the eighties. We can find this fact very well in the domain of structural system and curtain wall system. In large spatial structures, the structural-system of shell and steel truss dome was replaced by that of space frame, space truss and cable truss with membrane. In tall building, the structural system of rigid frame and shear wall was replaced by tubular system, core and outrigger system. Korean architects introduced the aluminum curtain wall in the sixties, but its low technological level caused many problems in reality. Therefore, precast concrete curtain wall appeared from seventies as the main method for an outer wall in tall building. With the augmentation of height after 1980, PC curtain wall was replaced by the aluminum curtain wall of unit type and structural glass wall system. These systems help to stress the transparency in a tall building.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 춘계 학술논문 발표대회
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• pp.9-10
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• 2012

According to the recent trends in the construction business have been actively booming both overseas plant orders and high-rise buildings orders. In addition high-rise building projects have being promoted or is actually under construction in Korea. Frame structure review which is the most consuming period on high-rise building is essential on that project. In this study looks for the currently form system and compares to those large system used in high-rise buildings.