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        2D기반 기존방법 대비 BIM기반 터널 물량산출 오차 분석

        신재철,백영인,박원태 한국지반공학회 2011 한국지반공학회논문집 Vol.27 No.8

        In case of applying BIM method to the civil engineering of irregularly shaped structure, BIM method is recognized to have relatively high construction productivity. In this paper, we developed quantity calculation algorithms applying BIM method to NATM tunnel construction method and implemented BIM based 3D-BIM Modeling Quantity Calculation. The results showed that BIM-based method has high reliabilty in structure work in which errors occurred only in the range between 0.00% and -1.45%. On the other hand, BIM method applied to earth work showed great error range of -19.78% to 35.30%. So the benefit and applicability of BIM method in civil engineering were confirmed. In addition, routine method for the quantity of earth work has negligible error as in the case of structure work. But, rock type’s quantity calculation showed significant errors so that the reliability of 2D-based volume calculation is problematic. It may thus be concluded that 3D-BIM is more reliable than the routine method in estimating the quantity of earth work. Considering the reliability and merits in the stage of its design, construction and maintenance levels, the application of BIM to civil engineering works is recommended. 대부분 비정형 구조물인 토목분야에서 BIM(Building Information Modeling)기법을 적용할 경우 현재 BIM 기법이 도입되기 시작한 건축분야와 비교해 상대적으로 건설 생산성 향상의 기대효과가 높을 것으로 인식되고 있다. 본 연구에서는 NATM공법 터널을 대상으로 BIM기반 3D 모델링을 통한 물량산출을 실시하여 기존의 2D기반의 물량산출과 비교, 오차분석을 수행하였다. 그 결과 구조물공에 있어서는 오차범위가 0.00%∼-1.45%로 아주 작게 나타났으나, 토공에 있어서는 오차범위가 -19.78%∼35.30%로 대단히 크게 나타났다. 이를 통해 기존 2D기반 구조물공 물량산출의 경우 0.00%∼5.00%의 할증률을 감안하여 본다면 BIM기반 물량산출과의 오차가 무시할 정도로 나타남에 따라 BIM기반 3D 모델링을 통한 자동 물량산출의 신뢰성을 확인하였다. 또한 토공의 경우는 토공전체의 물량산출 오차는 구조물공과 동일하게 오차가 무시할 정도이지만, 암별 물량산출 오차가 크게 나타남으로서 2D기반 물량산출의 신뢰성에 문제가 있음을 알 수 있었다. 따라서 토공은 반드시 BIM기반 3D 모델링을 통한 물량산출을 수행하여 물량산출의 신뢰성을 확보해야하는 사항이라 판단되며, BIM의 설계, 시공, 유지관리 단계의 정보통합의 장점을 고려하여 토목분야에서의 BIM 설계기법 도입에 대한 효용성 및 적용 가능성을 확인하였다.

      • BIM기반 NATM 터널 설계 지원 자동화 프로그램 개발

        신재철,백유진,윤영만,이희영,이상규 한국도로학회 2021 도로 : 도로학회지 Vol.23 No.3

        PURPOSES : In this study, a Design Support Automatic Program for NATM (new Austrian tunneling method) tunnels based on BIM that can generate shape information including property information via the development of BIM libraries and the construction of a library design support automatic program is developed. METHODS : In this study, the abovementioned program is developed as an add-in Revit program. AutoDesk's program has the highest utilization rate, and it allows support tools to be added easily. Construction information classification based on WBS(Work Breakdown Structure) is developed. Subsequently, library construction and program development algorithms are developed. RESULTS : The automatic program constructs a library that reflects geometric characteristics through the construction of a library automatic module as well as generates three0-dimensional (3D) shape information by mapping between the constructed library and 3D informal alignment. The proposed program can automatically assemble a constructed library through the development of an algorithm for generating sequences of 3D shape information and automatically place models on a 3D terrain. CONCLUSIONS : The proposed automatic program can be designed and changed easily. It is expected to contribute to improvements in the speed of 3D NATM tunnel modeling and the efficiency of NATM tunnel design.

      • KCI등재

        BIM기반 NATM 터널 설계 지원 자동화 프로그램 개발

        신재철,백유진,윤영만,이희영,이상규 한국도로학회 2021 한국도로학회논문집 Vol.23 No.6

        PURPOSES : In this study, a Design Support Automatic Program for NATM (new Austrian tunneling method) tunnels based on BIM that can generate shape information including property information via the development of BIM libraries and the construction of a library design support automatic program is developed. METHODS : In this study, the abovementioned program is developed as an add-in Revit program. AutoDesk's program has the highest utilization rate, and it allows support tools to be added easily. Construction information classification based on WBS(Work Breakdown Structure) is developed. Subsequently, library construction and program development algorithms are developed. RESULTS : The automatic program constructs a library that reflects geometric characteristics through the construction of a library automatic module as well as generates three0-dimensional (3D) shape information by mapping between the constructed library and 3D informal alignment. The proposed program can automatically assemble a constructed library through the development of an algorithm for generating sequences of 3D shape information and automatically place models on a 3D terrain. CONCLUSIONS : The proposed automatic program can be designed and changed easily. It is expected to contribute to improvements in the speed of 3D NATM tunnel modeling and the efficiency of NATM tunnel design.

      • KCI등재
      • KCI등재

        지진하중을 받는 사장교의 확률유한요소해석 및 신뢰성해석

        신재철,한성호,Shin, Jae-Chul,Han, Sung-Ho 한국전산구조공학회 2005 한국전산구조공학회논문집 Vol.18 No.1

        구조물에 포함되어 있는 불확실성에 의한 영향은 논리적으로 구조물의 안전도 해석에 활용할 수 있는 신뢰성 평가방법에 의해 안전성 검토를 수행하는 것이 합리적일 것이다. 따라서 본 연구에서는 지진하중을 받는 사장교 구조물을 대상으로 확률유한요소법을 기존의 신뢰성이론에 적합하도록 정식화하여 구조물의 동적응답해석 및 신뢰성해석을 보다 효율적으로 수행할 수 있는 프로그램을 작성하였다. 이를 바탕으로 하여 확률변수에 따른 변위, 부재력 및 케이블긴장력 등에 대한 평균, 표준편차 및 변동계수 등을 검토함으로써 동적응답특성을 정량적으로 분석하였다. 또한 신뢰성지수 및 파괴확률을 검토하여 사장교 구조물의 안전성을 평가하였다. Considering the effect by uncertainty in the structures, it is reasonable that the safety examination has to be performed by using method of reliability evaluation. Therefore, in this study, program is developed which can perform the reliability analysis or the dynamic response analysis more efficiently by formularizing the stochastic finite element analysis suitable for the existing reliability analysis about the cable stayed bridge suffering the seismic loads. Based on this program, the characteristic of dynamic responses is analyzed quantitatively by examining the average, the standard deviation and the coefficient of variance about the displacement, the resistance and the tension of cable according to the random variables. and the safety of cable stayed bridge is evaluated by examining of reliability index and failure probability

      • KCI등재

        대학종합평가와 대학발전: 성과와 과제

        신재철 한국교육행정학회 2004 敎育行政學硏究 Vol.22 No.4

        대학종합평가인정제는 1994년부터 7년을 주기로 본격적으로 도입․시행되었고, 현재의 제2주기 평가는 5년 주기(2006년 종료)로 실시되고 있으며, 2007년부터 제3주기 평가가 시작된다. 이 논문은 앞으로 실시될 제3주기 대학종합평가인정제의 개선방안을 탐색하는 데 있다. 이러한 목적을 달성하기 위하여 이 논문은 그 동안 실시된 대학종합평가인정제의 성과와 문제는 무엇이며, 대학종합평가인정제가 앞으로 해결해야 할 과제를 논의하였다. 대학종합평가인정제의 성과를 논의함에 있어서는 지금까지 밝혀진 연구결과들을 검토․분석하였으며, 제3주기 대학종합평가인정제의 방향과 틀에 관한 연구의 결과를 토대로 앞으로 해결해야 할 과제를 논의하였다. 대학종합평가의 성과는 대학교육의 질과 연구력 향상, 대학운영의 합리성 증대, 대학의 자구노력 촉진 등으로 나타났으며, 문제점으로는 평가기준의 타당성 미흡, 평가결과의 비효율적 활용, 대학의 국제경쟁력과 특성화 유도 부족 등을 들 수 있다. 앞으로 개선해야 할 대학종합평가인정제의 과제로 평가의 목적, 평가방법, 제도와 운영, 결과활용 등을 논의하였다. The purposes of this study were to analyze contributions and problems of the overall evaluation and accreditation system of university and to suggest the measures for improving the university evaluation system in the future. For these purposes, this study reviewed and analyzed the results of researches which were done on the university overall evaluation and accreditation system. Based on the results of study on the new paradigm of the third cycle university overall evaluation system, this study discussed the measures to solve the problems of the first and the second cycle evaluation and accreditation system. The findings of the researches showed that the evaluation and accreditation system contributed greatly to upgrade the quality of university education and the ability of faculty's research, and to improve university management and educational environment. But the findings indicated that the evaluation system failed to secure the validity of evaluation criteria and standards, to utilize the evaluation results, and to foster the internationally competitive ability and characterization of individual university in Korea. Finally, this study discussed the measures for improving the overall evaluation and accreditation system of university, the measures including purposes, methods, system, operation of the evaluation system, and utilization of the evaluation results.

      • KCI등재

        폐타이어 분말을 활용한 흡차음형 방음판 개발 연구

        신재철,조설아,윤영만,이희영,김성호,백유진 한국도로학회 2021 한국도로학회논문집 Vol.23 No.5

        PURPOSES : In this study, we aimed to develop an absorption and insulation soundproof board with excellent noise reduction ability using waste tire powder. METHODS : An optimum mix ratio of sound absorption material and sound insulation material was derived through a sound absorption test and a compressive strength test; a combustion test was performed to confirm whether the combustibility evaluation criteria were satisfied. Additionally, to derive a shape with excellent noise reduction ability, noise prediction simulation was performed. RESULTS : Through the sound absorption test, compressive strength test, and combustion test, an optimum mix ratio of sound absorption material and sound insulation material as well as a shape with excellent noise reduction ability was derived through noise prediction simulation. CONCLUSIONS : An absorption and insulation soundproof board was applied with sound absorption material and sound insulation material developed using waste tire powder. The recycling rate improved; thus, excellent noise reduction ability can be expected by developing not only materials but also shapes.

      • Catalytic Metals-Accelerated Crystallization of Metal Oxide Semiconductors

        신재철,조성운,권성민,조찬호,박성규 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-

        As an strategy of the high temperature conventional thermal process, catalytic metals-accelerated crystallization (CMAC) process using a metal seed layer was developed for low-temperature crystallization of solution-processed amorphous metal oxide films. As the case study, solution-processed crystalline-TiO<sub>2</sub> semiconductor were implemented. The developed CMAC process could effectively suppress crystallization temperature of amorphous-TiO<sub>2</sub> films, enabling scalable manufacturing of high-quality semiconducting crystalline-TiO<sub>2</sub> film with well-aligned anatase grains and low-defect density. Among the various catalytic metals, thin-Al seed layer could simultaneously provide low-temperature crystallization of solution-processed TiO<sub>2</sub> films and the implementation of high-performance solution-processed crystalline-TiO2 TFT. The results reported here argue a facile route to realize lowtemperature crystallization of MO semiconductors, offering compatibility with large-scaled applications.

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