• 한국전산구조공학회:학술대회논문집
• /
• 한국전산구조공학회 1997년도 가을 학술발표회 논문집
• /
• pp.24-31
• /
• 1997

Recently, in Korea, demand for establishment of systematic risk assessment techniques for construction projects has increased, especially after the large construction failures occurred during construction such as New Haengju Bridge construction projects, subway construction projects, gas explosion accidents etc. Most of existing risk analysis modeling techniques such as Event Tree Analysis and Fault Tree Analysis may not be available for realistic risk assessment of construction projects because it is very complex and difficult to estimate occurrence frequency and failure probability precisely due to a lack of data related to the various risks inherent in construction projects like natural disasters, financial and economic risks, political risks, environmental risks as well as design and construction-related risks. Therefor the main objective of this paper is to suggest systematic probabilistic risk assessment model and demonstrate an approach for probabilistic risk assessment using advanced Event Tree Analysis introducing Fuzzy set theory concepts. It may be stated that the Fuzzy Event Tree AnaIysis may be very usefu1 for the systematic and rational risk assessment for real constructions problems because the approach is able to effectively deal with all the related construction risks in terms of the linguistic variables that incorporate systematically expert's experiences and subjective judgement.

• 국제학술발표논문집
• /
• The 9th International Conference on Construction Engineering and Project Management
• /
• pp.744-751
• /
• 2022

Construction is among the most dangerous industries with numerous accidents occurring at job sites. Following an accident, an investigation report is issued, containing all of the specifics. Analyzing the text information in construction accident reports can help enhance our understanding of historical data and be utilized for accident prevention. However, the conventional method requires a significant amount of time and effort to read and identify crucial information. The previous studies primarily focused on analyzing related objects and causes of accidents rather than the construction activities. This study aims to extract construction activities taken by workers associated with accidents by presenting an automated framework that adopts a deep learning-based approach and natural language processing (NLP) techniques to automatically classify sentences obtained from previous construction accident reports into predefined categories, namely TRADE (i.e., a construction activity before an accident), EVENT (i.e., an accident), and CONSEQUENCE (i.e., the outcome of an accident). The classification model was developed using Convolutional Neural Network (CNN) showed a robust accuracy of 88.7%, indicating that the proposed model is capable of investigating the occurrence of accidents with minimal manual involvement and sophisticated engineering. Also, this study is expected to support safety assessments and build risk management systems.

• 헤리티지:역사와 과학
• /
• 제55권2호
• /
• pp.168-184
• /
• 2022

이 글은 삼국시대 토성 가운데 가장 많은 조사가 이루어진 백제 한성기 토성을 대상으로 축조기술을 살펴보기 위해 작성되었다. 이를 위해 토성의 축조공정을 '입지선정과 기저부 조성', '체성 축조', '공정의 마무리와 증축 및 보수'로 나누어 검토하였다. 백제 한성기 토성의 축조에는 다양한 기술이 동원되었음이 분명하게 확인된다. 지형조건에 따라 알맞은 기초보강기술이 적용되었으며, 본격적인 체성의 축조에도 여러 가지 기술을 활용하였다. 특히 체성축조 기술의 경우 성토기법과 판축기법으로 뚜렷하게 구분할 수 있다. 성토기법(A식)은 2000년대부터 본격적으로 인식된 기술로, 판축에 비해 고식적인 기술로 추정된다. 판축구조물을 사용하지 않은 기술로, 복잡한 토층선, 교호성토 방식, 토제 및 토괴 활용, 타원형 성토단위의 연접 등을 특징으로 꼽을 수 있다. 성토기법은 삼국시대 성토구조물 사이의 적극적인 기술 공유와 응용을 이해할 수 있게 하는 기술이기도 하다. 판축기법(B식)은 판축구조물을 이용하여 성벽을 구축하는 기술로, 판축구조물의 높이와 규모, 확장방식을 기준으로 B1식과 B2식으로 구분이 가능하다. B1식이 선행하며, 한성기 말기에 B2식이 도입된 것으로 보인다. 판축기법은 서울 풍납토성을 시작으로 하여 남한지역 각지로 확산된 것으로 판단된다. 성토기법과 판축기법은 등장시점부터 공존하였으며, 점차 판축토성 위주로 변화하였다. 성토기법과 판축기법은 토층 양상이 판이하며 축조 순서 또한 정반대이다. 따라서 양자는 기술 계통이 서로 달랐던 것으로 추정된다. 백제 한성기부터 시작된 토성의 축조기술은 웅진·사비기에도 계승 및 발전하였으며, 그 과정에서는 다른 국가와의 활발한 상호작용이 있었을 것이다. 최근 남부지역을 중심으로 토성 조사사례가 증가하는 추세이므로, 백제를 포함한 주변 국가와의 비교·분석이 입체적으로 이루어질 것으로 기대한다.

• 한국건설순환자원학회지
• /
• 제4권4호
• /
• pp.41-47
• /
• 2009

• 국제학술발표논문집
• /
• The 5th International Conference on Construction Engineering and Project Management
• /
• pp.391-396
• /
• 2013

As the construction environment has been changing all the times, the techniques for managing the construction projects have been improved accordingly. The schedule management technique, one of the construction management tools, has been evolved as well in order to be adaptable to new construction environment. Most of newly proposed scheduling techniques have been based on the Critical Path Method (CPM) that was proposed in 1956. The CPM is classified into two categories, Arrow Diagramming Method (ADM) and Precedence Diagramming Method (PDM). ADM is so good in the visual format but it cannot express the overlapping relationships between two consecutive activities. On the other hand, PDM can express the overlapping relationships but it is unsatisfactory in the visual format. Recently, as the construction environment becomes more complex and the role of schedule management becomes more and more important, the overlapping expression becomes one of critical factors for scheduling as well. Most of construction project participants prefer more comfortable visual format, however, the scheduling software based on the PDM cannot satisfy their basic requirement. Beeliner, new scheduling software based on the Beeline Diagramming Method (BDM) that was proposed in 2010, was developed in 2012, it can express more flexible overlapping relationships and has superior visual format as well. This paper presents major features and applications of Beeliner, and makes construction professionals understand new scheduling concept and its applications.

• 한국지반환경공학회 논문집
• /
• 제13권5호
• /
• pp.59-68
• /
• 2012

본 연구의 목적은 홍수범람해석을 위한 하천지형 구축기법을 연구하는 것이다. 청도천을 대상으로 1:5,000수치지형도와 WMS를 통해 무료로 제공되는 DEM인 ASTER과 SRTM를 이용하여 하천지형을 구축하였으며, 범람해석에는 HEC-RAS 및 HEC-GeoRSA를 적용하였다. 빈도별 기법에 따른 홍수범람해석을 모의하였으며, 1:5,000수치지형도를 기준으로 홍수심과 홍수면적을 비교하였다. 중규모 이하 자연유역을 대상으로 기법별로 구축된 하천지형은 큰 차이가 없었으며, 범람해석시 ASTER DEM을 이용한 해석결과는 침수면적의 경우 산간지역의 경우 다소 크게 산정되었다. SRTM DEM의 경우에는 타기법에 비하여 적절한 홍수 범람해석 결과가 산정되어 향후 실무에서 활용이 가능할 것으로 기대된다.

• 인터넷정보학회논문지
• /
• 제17권4호
• /
• pp.87-93
• /
• 2016

한국의 고령화가 급속하게 진행됨에 따라 고령자의 삶의 질을 향상시키기 위한 필요성이 증가 하고 있으며, 이에 따라 건축 설계 방식들도 고령자의 주거 환경 향상 및 행태 변화에 대응하기 위한 모듈러 공법으로 전화되어가고 있으며 고령자들을 위한 다양한 IT 시스템들도 제안되어 오고 있다. 본 논문에서는 앞서 언급한 고령자를 위한 주거설계 기법과 IT기술들의 배타적인 발전에서 벗어나 건축 설계 초기부터 IT 기술과의 융합적 건축 설계를 하기 위한 방법론에 대하여 논하며, 구체적으로 고령자 행동 및 주거 IT서비스 계획 요소 분석과 모듈러 주거 공법에서 IT서비스의 융합의 고려사항들에 대하여 연구하였다.

• Smart Structures and Systems
• /
• 제18권3호
• /
• pp.601-623
• /
• 2016

Precast concrete elements are widely used in the construction of buildings and civil infrastructures as they provide higher construction quality and requires less construction time. However, any abnormalities in precast concrete surfaces such as non-flatness or distortion, can influence the erection of the elements as well as the functional performance of the connections between elements. Thus, it is important to undertake surface flatness and distortion inspection (SFDI) on precast concrete elements before their delivery to the construction sites. The traditional methods of SFDI which are conducted manually or by contact-type devices are, however, time-consuming, labor-intensive and error-prone. To tackle these problems, this study proposes techniques for SFDI of precast concrete elements using laser scanning technology. The proposed techniques estimate the $F_F$ number to evaluate the surface flatness, and estimate three different measurements, warping, bowing, and differential elevation between adjacent elements, to evaluate the surface distortion. The proposed techniques were validated by experiments on four small scale test specimens manufactured by a 3D printer. The measured surface flatness and distortion from the laser scanned data were compared to the actual ones, which were obtained from the designed surface geometries of the specimens. The validation experiments show that the proposed techniques can evaluate the surface flatness and distortion effectively and accurately. Furthermore, scanning experiments on two actual precast concrete bridge deck panels were conducted and the proposed techniques were successfully applied to the scanned data of the panels.

• 한국조경학회지
• /
• 제28권6호
• /
• pp.16-28
• /
• 2001

The purpose of this study is to arrange the terminology of the drawings in Chosun Dynasty, and to investigate the characteristics of drawings after the middle of Chos n Dynasty. This study is based on the and analysis of historic documents and drawings including drawings from China and Japan. In order to accomplish this, the drawings for the process of design were studied first, and the techniques of drawing were studied next in comparison with Japanese drawing techniques. Lastly, the technicians of drawing were studied. The results of this study were as follows; 1) Though the procedures of design Choson dynasty were not divided into planning, designing, construction and maintenance just like those of modern society, a variety of drawings in that time were used in each level. 2) The drawings in Choson Dynasty ere divided into Tohyong and Tosol, and mostly, those for design and construction were Tohy ng. 3) Based on the interpretation of Japanese drawings, several suggestions were presented to solve the questions of the drawing techniques for design and construction. 4) The technicians of drawing were the painters who were trained in a government organization in charge of royal paintings. In the future, research of this area should be continued in to deepen study on drawings as historical materials. This research provides meaningful of guidance in the analysis of historic drawing paintings.

• 교육녹색환경연구
• /
• 제7권1호
• /
• pp.29-38
• /
• 2008

The purpose of this study was to discuss how traditional construction practices could be applied to school buildings. The spatial arrangement and constituents of Seoweon and Hyanggyo buildings were analyzed, and the spatial arrangement and ground plans of current schools were analyzed as well. As a result, it's found that how the characteristics of traditional architecture should be reflected in today's school design is one of critical matters that need an immediate attention. Based on the case study, there are some suggestions about the application of traditional construction techniques to school buildings: (1) The link between internal and external spaces should be stressed. The type of spatial configuration the could ensure nature accessibility is required. (2) The use of environment-friendly materials is recommended, and classrooms should be arranged in a way to let them function as multipurpose educational spaces. (3) It's not advisable to construct school buildings according to the sung-Confucianistic construction techniques of traditional educational institutions, but there should evidently be a change in tasteless school buildings, They should be built in small size and in consideration of harmony with nature and ecosystem, and boarding schools should be constructed in a more careful and discreet manner.