• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.553-557
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• 2013

Roof and exterior wall are designed and constructed in a manner that prevents the accumulation of water within the wall and roof assembly in the formal building. However, in a freeform building there is no clear distinction between exterior wall and roof. In other words, the exterior walls and roof systems of the freeform building are integrated as a surface, unlike the formal building envelope. Therefore, freeform architecture needs a systemized envelope design method to perform functions of exterior wall and roof. However, in many cases, construction methods for roof and exterior wall are applied to freeform buildings without necessary alterations, which lead to incomplete design, leakage, cracks and other problems. Freeform architecture is thus designed and constructed differently from formal buildings. In order to more easily and inexpensively actualize freeform architecture, Building Information Modeling (hereinafter referred to as BIM) has recently been applied in the construction industry. The studies and case analysis are not sufficient to identify the implications and contributions of freeform buildings in future similar projects. Therefore, this research will study design and construction methods for freeform surfaces. This study attempts to analyze the pros and cons of each method for the concrete surface frame, and then presents the panel options for envelope system of the freeform architecture.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2015년도 추계 학술논문 발표대회
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• pp.181-182
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• 2015

The production technologies of free-form concrete panels are emerging to satisfy the need of modern complex shaped in architectural design. This study aims for introducing and improvising the innovative technique called Rod type mold that overcomes the difficulties in some extent by enabling the mold to be used many times, making the shape of the mold adjustable in a flexible way and describing its production process to provide the alternative solution for the construction of free-form mold with considering the features including reusability and optimization cost across its production process. In this study, the freeform concrete panel shape was designed and experiment was done using computerized numeric control machine and rod type mold. The problems appeared on achieving desired shape while operating on rod type mold. The process of identifying all the root causes and contributing causes that may have generated an undesirable condition were done. Consequently, the conical or semicircular shaped was proposed for the end of Numerical control rod and replaced it with the existing flat shaped end to avoid the detachable problem and to improve rod type mold performance.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 추계 학술논문 발표대회
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• pp.4-5
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• 2019

With recent advances in computer technology, the ratio of free-form building designs to those of the past is increasing gradually. However, the current technology of free-form structure is very low. The core technology for free-form building implementation is the manufacturing technology of FCP (Free-form Concrete Panel), which indicates an unformed outside, and through the development of FCP manufacturing technology, the construction technology of free-form architecture can be enhanced. The inside and outside of an free-form building should be represented by the designer's intended curvature, and the panel's thickness by segment should be constant. For this reason, the technology that keeps the thickness of panels constant during the FCP production process is a key technology that can improve the quality of FCP. In this study, a basic study on ways to maintain a constant thickness of FCP is conducted.

• 한국건설관리학회논문집
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• 제14권4호
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• pp.84-96
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• 2013

최근 건설 산업의 디지털화로 인하여 건축 디자인이 정형에서 자유로운 비정형 형태로 변화하고 있다. 특히, 국내에서는 최근 비정형이 디자인 경향으로 도입되어 현상설계, 턴키 등에서 설계 당선을 위한 디자인 요소로 많이 적용되고 있다. 그러나 기존의 정형 건축물의 외벽공법을 비정형 건축물의 외피에 그대로 적용함으로써 누수 및 크랙 등 다양한 하자가 발생하고 있다. 이러한 문제점을 개선하고 공사기간과 공사비를 최소화할 수 있는 비정형 건축물의 설계와 시공이 새로운 기술로 도입되고 있다. 이에 본 연구는 비정형 외피시스템 구현을 위한 공법을 국내외 비정형 건축물의 외피시스템 사례 분석을 통하여 실증적으로 시사점을 도출하고 비정형 건축물 외피시스템의 설계와 시공시 고려해야 할 사항을 다음과 같이 제시하였다. 첫째, 시공성을 고려한 비정형 형태의 설계가 되도록 하여야 한다. 둘째, 2방향 곡면을 정확히 구현할 수 있는 단위 패널 생산 기술의 개발이 필요하다. 셋째, 비정형 콘크리트 외피용 노출 콘크리트 거푸집을 개발하여야 한다. 넷째, 외피 시스템을 부위별로 구분하여 우수처리와 방수를 위한 재료와 공법 특성과 유지관리 방안을 고려하여야 한다.

• 국제학술발표논문집
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• The 10th International Conference on Construction Engineering and Project Management
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• pp.186-192
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• 2024

Free-form buildings are composed of different curved surfaces and panels with varying curvatures used for the exterior. Because free-form curved surfaces differ from those of conventional buildings, they serve as landmarks worldwide and generate economic and social profits. However, molds used to realize the curved surfaces of free-form buildings are typically single-use, resulting in construction waste and posing limitations such as environmental pollution and increased construction costs. To address this issue, current research is focused on developing reusable forms that precisely implement free-form curved surfaces. Among these approaches, the Free-form Concrete Panel (FCP) employs reusable silicone material as a mold. The silicone mold consists of a lower part and a side part, with both parts fixed together by friction due to the same material. However, during the concrete pouring process into the silicone mold, lateral pressure can cause shifting, reducing the precision of the FCP and resulting in defective panels. To address this challenge, this study introduces the use of iron powder in the lower part and magnets on the sides to secure the form using magnetic force.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2015년도 춘계 학술논문 발표대회
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• pp.126-127
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• 2015

New technologies using a CNC machine to reduce the production cost of free-form buildings are being developed. To produce free-form members with such technologies, a vast free form building should be first divided into multiple panels that can be produced. Considering the curved surface of free-form buildings, the shape and size of divided freeform panels vary, which will lead to a great deal of errors. Currently, the engineers and designers complete the panelizing work through trials and errors even in large-scale projects, which results in increased construction duration and cost. Thus, it is necessary to develop a freeform panelizing technology to maximize the economic effects of free-form concrete member production technology. The purpose of the study is to analyze influence factors on panelizing of free-form buildings, which is a preceding research for development of a panelizing technology. The influence factors drawn will provide a core basis for development of panelizing technologies for free-form buildings.