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랜드마크 완성 이후 초고층구조물에 대한 일반시민의 인식현황
허석재 ( Heo Seok Jae ),이용훈 ( Lee Yong Hun ),정란 ( Lan Chung ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
This study is the result of the survey on perception and anxiety of high - rise buildings in the general public. As a result of the survey, there was insufficient change in awareness before the construction of high - rise buildings such as landmarks was insufficient (before 2015). However, half of the citizens who felt uneasy that high-rise buildings were likely to collapse due to external influences were close. The anxiety was mainly due to the information of the press or the Internet. It is thought that the cause of anxiety comes from touching negative opinions about the high-rise buildings.
드론 스캐닝과 오픈소스 프로그램을 통한 효율적인 BIM 생성
허석재 ( Heo Seok Jae ),최원준 ( Choi Won Jun ),나승욱 ( Na Seoung Uk ),김치경 ( Kim Chee Kyung ) 한국구조물진단유지관리공학회 2023 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.27 No.1
구조물을 스캔하여 BIM(BuiMing Information Model)을 만들어내는 방식은 LiDAR(Light Detection And Ranging Sensor) 라는 센서를 사용하여 구조물의 거리와 모양, 크기를 인식하고 PCM(Point Cloud Mapping)기술로 3차원의 공간을 디지털화 하는 방식이 일반적이다. 여기서 문제는 LiDAR 센서가 고가이며, 인식거리가 짧고 해상도가 낮다는 것이다. 매일 상황이 변화하는 건설현장에서 LiDAR 센서만으로는 BIM화하기에는 많은 비용과 인력, 장비가 필요할 것이며, 앞으로 디지털 현장관리를 위해서 꼭 필요한 현장 BIM화를 위해 드론을 활용하는 방안에 대해 연구하였다.
와플 형상을 가지는 프리캐스트 프리스트레스트 콘크리트 슬래브의 구조성능
허석재(Heo Seok-Jae),조승호(Cho Seung-Ho),노영숙(Roh Young-Sook),박태원(Park Tae-Won),이상현(Lee Sang-Hyun),정란(Chung Lan) 대한건축학회 2010 大韓建築學會論文集 : 構造系 Vol.26 No.1
Precast prestressed concrete provides high-quality structural elements, construction efficiency, and saving in time and overall cost of investment. Precast Prestressed Concrete had been widely used during 1990's specially those for apartment buildings. Despite of all the advantages of Precast Concrete, domestic demand was decreased due to technical difficulties for consistent quality control and maintenance problems. However precast prestressed concrete structure have become prevalent in the large parking garage and complex sales industry in recent years. The main object of this study is to investigate structural performance of Waffle Slab which was developed at our research center to improve connection problems. Experimental parameters are the number of prestressing wires and with/without truss girder on slab for flexural performance test. Also test parameter are the stirrup intervals(150㎜, 200㎜, 250㎜) and with/without truss girder for shear performance. A total of 14 full-scale specimens were manufactured and waffle slab size is 1.98m?10.80m. Increasing number of prestressing steel wire provides significant increase of the flexural strength but it causes brittle failure mode. In case of using truss girder, structural performance was improved due to increase of bond strength between waffle slab and topping concrete. Shear capacity test showed that the stirrup interval of 150㎜ specimen exhibited more brittle behavior than those of 200mm or 250㎜ specimens. Proper regulations of the number of steel wires and stirrup intervals are necessary for ensuring ductile behavior of waffle slab.