논문 : 원지반 부착식 판넬옹벽의 현장 적용성 평가

민경남 ( Kyoung Nam Min ),이재원 ( Jae Won Lee ),이중관 ( Jung Gwan Lee ),강인규 ( In Kyu Kang ),안태봉 ( Tae Bong Ahn ) 대한지질공학회 2016 지질공학 Vol.26 No.1

최근 들어 도심지 재개발과 산업단지 조성 등이 활발하게 진행되면서 깎기 비탈면의 효율적 활용과 민원방지 그리고 환경훼손을 최소화할 수 있는 공법의 필요성이 점차 커지고 있다. 판넬식 옹벽은 지보재 보강을 통해 원지반의 전단강도를 증가시키고 전면판인 프리캐스트 판넬과 지보재를 체결하여 개별적 벽체를 형성시킴으로써 수평토압에 저항하는 공법이다. 프리캐스트판넬의 적용으로 기존 옹벽에서 발생하던 콘크리트 현장타설에 의한 공기지연과 콘크리트 품질저하 등의 문제는 다소 해결되었지만 비탈면 과다절취에 의한 사토처리 및 토취장 확보, 및 옹벽 전면 콘크리트 노출로 인한 경관성 저하문제는 여전히 미결과제로 남아있는 실정이다. 본 연구에서는 기존 판넬식옹벽의 단점을 보완하기 위하여 판넬 전면을 자연암반형으로 연출하고 수직의 원지반에도 부착이 가능하도록 공정을 개선하였으며 실내 및 현장시험을 통하여 개발된 옹벽의 현장 적용성 평가를 수행하였다. 판넬에 대한 실내시험을 수행하여 자연암반형 판넬의 자체강도 및 거동특성에 대한 검증을 수행하였으며 현장 시험시공을 통하여 수직절취 및 원지반 부착에 대한 현장 적용성을 평가하였다. 또한 시험시공 시 보강재 및 비탈면에 대한 계측을 수행하였으며 이를 3차원 수치해석 결과와 비교·분석하였다. 실내시험 결과 사보강에 의한 판넬의 펀칭강도 증가를 확인하였으며 현장 시험시공을 통하여 원지반 부착식 옹벽의 시공성 및 현장 적용성을 확인하였다. 또한, 장기계측 및 수치해석적검증을 통하여 원지반 부착식 옹벽 시스템이 시공중 및 장기적으로 안정성이 확보됨을 확인하였다. New building methods are needed to aid increased inner-city redevelopment and industrial construction. A particular area of improvement is the efficient use of cut slopes, with the minimization of associated problems. A retaining wall of precast panels can resist the horizontal earth pressure by increasing the shear strength of the ground and reinforcing it through contact with the panels. Precast panels allow quick construction and avoid the problem of concrete deterioration. Other problems to be solved include the digging of borrow pits, the disposal of material cut from the slope, and degradation of the landscape caused by the exposed concrete retaining wall.This study suggest the methods of improvement of an existing precast panel wall system by changing the appearance of the panels to that of natural rock and improving the process of adhering the panel to a vertical slope. The panels were tested in the laboratory and in the field. The laboratory test verified their specific strength and behavior, and the field test assessed the panels`` ground adherence at a vertical cutting. Reinforcement of the cutting slope was also measured and compared with the results of 3D numerical analysis. The results of laboratory test, identified that the shear bar increase the punching resistance of panel. And as a results of test construction, identified the construct ability and field applicability of the panel wall system adhered to in-situ ground. In addition to that, extended measurement and numerical analysis, identified the long-term stability of panel wall system adhered to in-situ ground.

보강된 Wire Panel을 이용한 시스템건축용 건식벽체의 시공법

박병찬,김종성 대한건축학회지회연합회 2008 대한건축학회지회연합회 학술발표대회논문집 Vol.2008 No.1

The purpose of this study was to develop the systemic architectural walls for the middle-low rise steel structure. To analyze the construction method of the systemic architectural walls, we developed the new fundamental unit walls by strengthening steel plate to the basic unit using existing wire panel and manufactured full-scale walls. As a result, we found that the structural performance, especially bending capacity, was much more excellent compared to the existing walls. And we figured out the problems through manufacturing full-scale walls, and we want to derive an wall sub-system for the systemic architectural package.

벽패널 복사난방시스템의 방열특성에 관한 시뮬레이션 해석 연구

구보경(Koo Bo-Kyoung),송승영(Song Seung-Yeong),임재한(Lim Jae-Han) 한국건축친환경설비학회 2011 한국건축친환경설비학회 학술발표대회 논문집 Vol.2011 No.10

Recently the radiant panel heating and cooling system has been regarded as an alternative of low temperature heating and high temperature cooling by applying the renewable energy sources to the heating and cooling of buildings. Especially this system can be used as HVAC system alternatives in super high-rise buildings for energy saving and thermal comfort. Also it can be possible to reduce the plenum space because the minimum ventilation air will be supplied into the space. This study aimed at evaluating the basic characteristics of thermal output in radiant wall panel heating system. For this purpose, the thermal output of several radiant wall panel types were analysed by 3D dynamic heat transfer simulation. According to the supply water temperature, composition of panel layers and panel dimension, the thermal output characteristics such as surface temperature distribution, temperature difference between supply and return water were analyzed. The results show that we should improve the heat storage performance of wall panel for better distribution of surface temperature and thermal comfort.

경량 벽패널 복사난방시스템의 방열 특성

임재한(Lim, Jae-Han),송승영(Song, Seung-Yeong),구보경(Koo, Bo-Kyoung) 한국건축친환경설비학회 2011 한국건축친환경설비학회 논문집 Vol.5 No.4

Recently the radiant panel heating and cooling system has been regarded as an alternative of low temperature heating and high temperature cooling by applying the renewable energy sources to the heating and cooling of buildings. Especially this system can be used as HVAC system alternatives in super high-rise buildings for energy saving and thermal comfort. Also it can be possible to reduce the plenum space because the minimum ventilation air will be supplied into the space. This study aimed at evaluating the basic characteristics of thermal output in light-weight radiant wall panel heating system. For this purpose, the thermal output of several light-weight radiant wall panel types were analysed by 3D dynamic heat transfer simulation. According to the supply water temperature, composition of panel layers and panel dimension, the thermal output characteristics such as surface temperature distribution, temperature difference between supply and return water were analyzed. The results show that we should improve the heat storage performance of wall panel for better distribution of surface temperature and thermal comfort.

대형재하시험을 통한 원지반 부착식 패널옹벽의 거동특성

신윤철(Yuncheol Shin),민경남(Kyongnam Min),김진희(Jinhee Kim),안태봉(Taebong Ahn) 한국지반환경공학회 2016 한국지반환경공학회논문집 Vol.17 No.11

패널식 옹벽은 지보재를 통한 선지보 개념으로 프리캐스트 패널과 체결하여 원지반 강도를 최대한 보호하며 보강하는 공법이다. 최근 건설공사에서 대규모 깎기비탈면의 형성에 따른 토공량 증가와 환경 훼손을 최소화하고 용지제한에 따른 토지의 효율적인 이용을 위해 패널식 옹벽의 적용이 증가하고 있는 추세이다. 원지반 부착식 패널옹벽은 자연암반 질감을 갖는 프리캐스트 콘크리트 패널을 사용하여 경관성을 향상시키고 완전한 Top-Down 시공법을 구현하도록 개발된 공법으로 수직절취와 패널의 원지반 직접부착이 가능해 비탈면 이완을 최소화하고 터파기 및 되메우기 공종을 배제하여 시공성을 개선하였다. 본 연구는 현장시험시공을 수행하여 수직절취 및 Top-Down에 대한 시공성을 확인하고, 대형재하시험과 하중단계별 계측결과를 분석하여 원지반 부착식 패널옹벽의 거동특성을 분석하였다. A precast panel wall system resists against the horizontal earth pressure by increasing the shear strength of ground by reinforcement connected to the panel. The application of precast panel wall system is growing to lately minimize the earth work and environmental damage caused by large cut slope and to use the limited land effectively. The ground adhered panel wall system is the construction method that has the panel engraved with natural rock shape to improve the landscape. This system is developed to complete Top-Down method, and it is possible to have vertical cut, and to adhere to in-situ ground, improve construction ability by minimizing the ground relaxation and exclusion the trench and backfill process. In this study the field tests were performed to verify the construction ability about the vertical cut and complete Top-Down process and the construction behavior of ground adhered panel wall system was analyzed by large scale loading test and measurement results during loading test.

Numerical study of slim curtain wall spandrel with integrated vacuum insulation panel: Concept, performance evaluation and challenges

Boafo, Fred Edmond,Kim, Jin-Hee,Kim, Jun-Tae Elsevier 2019 Energy and buildings Vol.183 No.-

<P><B>Abstract</B></P> <P>The thermal and energy performance of curtain wall façades can be improved by incorporating spandrel units in areas such as slabs/plenums to hide existing building services or areas where concealment of indoor space is required. The main objective of this study was to numerically investigate the performance of curtain wall façade with integrated vacuum insulation panel (VIP) as spandrel insulation. The main study constitutes six parts: (1) concept and derivation of governing equations, (2) model and its validation, (3) VIP integration alternatives, (4) overall thermal performance considering 2D/3D thermal bridges and internal surface temperatures, (5) building energy and vision-spandrel ratio effect, and (6) limitations and challenges. Thermal behavior of the system was characterized via 3D heat transfer simulations using Physibel TRISCO according to EN ISO 10211, while dynamic building energy analysis was carried out using EnergyPlus based on a stereotypical office building unit, in relation to the humid continental climate of Incheon, Republic of Korea. The baseline model was validated with experimental data from previous study, and a marginal discrepancy less than 4% was found between them. Further, the validated model was developed into different spandrel configurations, seeking to mitigate thermal bridges while improving insulation performance, by varying VIP integration design. Results indicated that the best VIP spandrel alternative improved thermal performance of the system by about 30%. Moreover, year-round space heating and cooling energy reductions were realized by gradually increasing the spandrel area by ratio from 0% to 80%, howbeit at the expense of electrical lighting energy. Finally, some noteworthy limitations of the study and challenges related to VIP integration into curtain wall spandrel have been duly discussed.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A hybrid curtain wall system with VIP spandrel was investigated. </LI> <LI> The VIP spandrel unit was composed of VIP integrated between glass panes. </LI> <LI> 2D/3D thermal bridges are quite significant due to frames, brackets, and bolts. </LI> <LI> Alternatives to curtail thermal bridges reduced heat loss by about 30%. </LI> <LI> Year-round heating and cooling energy reductions were realized by gradually increasing the spandrel area. </LI> </UL> </P>

메탈 커튼월 패널 시스템의 열교최소화 대안별 에너지, 결로 및 시공성 평가

송진희(Song, Jin-Hee),박민주(Park, Min-Ju),임재한(Lim, Jae-Han),송승영(Song, Seung-Yeong) 대한건축학회 2015 대한건축학회논문집 Vol.31 No.2

In order to achieve the national target for reducing the green house gas emission, energy consumption in buildings should be reduced because such consumption accounts for more than 21% of the national energy consumption in South Korea. To save energy in buildings, the most important task is to improve the energy performance of a building envelope. Therefore, the Korean government has tightened insulation design code for buildings. In the case of a metal-exterior curtain wall panel system built using steel trusses, actual insulation performance may not be satisfied the code because of additional heat loss through local thermal bridges such as fixing units, steel trusses and joints between panels. The aim of this study was to develope highly insulated metal-exterior curtain wall panel systems in order to obtain the better energy performance. After examining the locations and configurations of thermal bridges, three alternatives for removing thermal bridges were proposed and compared with two existing curtain wall panel systems in terms of their energy performance, condensation risk, construction cost, and constructability. As results, the second alternative reduces heat loss by maximum 85.7% compared with existing cases and has optimal construction cost and constructability.

경량기포콘크리트(ALC) 패널을 건축물 외장 커튼월에 적용을 위한 도료의 기초적 연구

이용수,라현주 한국디지털건축·인테리어학회 2012 한국디지털건축인테리어학회 논문집 Vol.12 No.3

Autoclaved Lightweight Concrete(ALC) features such as a high performance insulation , the fire resistance, the advantage of easy handing construction, and lightweight panels applied the curtain wall system. ALC materials are certified as non-toxic environmental and eco-friendly productions. But ALC external panels mixed with blast furnace slag pounder and silica fume have to be coated with a stucco compound or plaster because of resisting the ambient environment. This study is that mixing tests to evaluate a performance analysis of exterior paints to be make-up pigments(organic or inorganic) coated with panel surface. Testing compared by KS F 2476; flow test, KS F 2426; compression strength test, KS F 2762; bond strength test. In results, the case of the inorganic binder, ratio of alumina cement : anhydrite is 90:10 to 80:20 at the highest level of intensity. In the case of the organic binder, adhesive strength rating at surface of ALC, the pullout strength is below 0.5 N/mm2 but the normal concrete is over 2.0N/mm2. A contents ratio of EVA resin is more than 3% and then bond strength is effectively.

스터드 패널형 모듈러 건축시스템의 횡력 저항성능 평가

하태휴(Ha, Tae-Hyu),이지형(Lee, Ji-Hyung),홍성걸(Hong, Sung-Gul) 대한건축학회 2013 大韓建築學會論文集 : 構造系 Vol.29 No.9

This study aims to estimate the lateral force resisting capacities of multi-story steel stud panel modular buildings. The lateral displacement of modular buildings composed of the rotation and slip deformation of joint and the shear deformation of stud-walls. The shear deformation of steel-stud walls with sheathing panels can be defined by combining several failure mechanisms according to the material properties of sheathing panels and connection detail. This study proposed the theoretical estimation of lateral force resisting capacities according to these procedures. In addition, a two-story modular structure made of steel stud-walls was tested under cyclic loading. The test result shows that the behavior of first story wall is governed by shear diaphragm action explained by equivalent bracing model. Finally this study suggests that lateral resistant behavior of multi story modular system can be explained by rigid body motion as well as shear diaphragm action, which is a characteristic behavior of modular building system caused by bolt connection between lower and upper unit modules.

A Study on Cooling Systems with Cold Water Panels in the Walls of Small Buildings

Dong-Hyun Cho(조동현),Myeong-Gi Jo(조명기) 한국기계가공학회 2019 한국기계가공학회지 Vol.18 No.10

This study was conducted on cooling systems in which, for the first time at home and abroad, cold water panels are embedded in the walls of small buildings for radiant cooling by heat absorption with cold water. In summer, cold water is circulated through cold water (chiller) circulation tubes embedded in three walls (two side walls and one rear wall) of a building to implement radiant cooling by the coldness of the water. From the results of this study, the experimental and theoretical natural convection heat transfer coefficients were relatively well-matched over the entire experimental range, thereby verifying the reliability of the experimental results. The surface temperature reduction rate of the walls in which cold water panels are embedded was large whereas that of the walls where no cold water panels are embedded was very small.