• Proceedings of the Computational Structural Engineering Institute Conference
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• 2010.04a
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• pp.375-378
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• 2010

본 논문은 엔지니어링 문서정보를 준구조화된 XML 문서로 변환하고 이를 3차원 교량 모델과 연계하는 방법을 제시한다. 이를 위해 먼저 구조계산서의 세부 목차에 따른 문서구조를 추출하는 기법을 이용하여 3차원 교량모델을 구성하는 각 부재와 매핑되는 구조계산서 문서의 일부를 프로그램 상에서 자동으로 추출하기 위한 모듈을 개발하였다. 또한 3차원 교량모델의 정보를 운영하기 위해 IFC 기반의 교량정보모델을 개발하였다. 개발된 정보모델은 교량요소들의 논리적 구성체계를 공간적 요소, 물리적 요소 및 그룹 요소별로 표현할 수 있도록 지원한다. 이와 같이 개발된 기술을 이용하여 3차원 교량모델 뷰어에서 구조계산서의 정보를 검색하기 위한 시범 툴을 개발하였으며, 4개의 단위 교량으로 구성된 복합형식의 교량에 대한 3차원 모델을 구축하고 각 교량에 대한 구조계산서 또한 XML 문서로 변환하였다. 이와 같이 구축된 두 정보체계에서 사용자가 선택한 임의의 구성요소에 관한 세부 문서정보의 조회가 가능함을 보임으로써 제시된 방법의 적합성을 검증하였다.

• 한국방재학회:학술대회논문집
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• 2010.02a
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• pp.69.1-69.1
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• 2010

본 연구는 교량 시설물의 재난방지를 위한 정보시스템의 구축에 있어 선행되어야 하는 교량 구조계산서 항목 저장정보의 질적 향상을 위해 XML 스키마 매칭 기법을 효율적으로 활용할 방법에 대해 제시하였다. 이를 위하여 XML 스키마 매칭에 사용되는 가중치 변화에 따른 매칭 정확도를 나타내는 데이터를 구축하고, 이를 활용하여 데이터 마이닝 기법 중 하나인 의사결정나무 모델을 구현하여 교량의 형식, 문서가 포함하고 있는 항목의 수, 문서를 작성한 회사에 따라 달라질 수 있는 최적의 가중치를 지동으로 선정할 수 있는 프로세스를 제안하였다. 의사결정나무 모델을 통해 결정한 매칭 가중치는 이전에 비하여 약 10% 정확도 상승효과가 있음을 알 수 있었다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.1D
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• pp.51-59
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• 2012

An efficient application method of XML schema matching technique to the document structure of structural calculation document (SCD) of bridge is proposed. With 30 case studies, a parametric study on weightings of name, sibling, child, and parent elements of XML scheme component that are used in the similarity measure of XML schema matching technique has been performed, and suitable weighting to analyze document structure of SCD is suggested. A simplified formula for quantification of similarity is also introduced to reduce computation time in huge scale document structure of SCDs. Numerical experiments show that the suggested method can increase the accuracy of XML schema matching by 10% with suitable weighting parameters, and can maintain almost the same accuracy without weighting parameters compared to previous studies. In addition, computation time can be reduced dramatically when the proposed simplified formula for the quantification of similarity is used. In the numerical experiments of testing 20 practical SCDs of bridges, the suggested method is superior to previous studies in the accuracy of analyzing document structure and 4 to 460 times faster than the previous results in computation time.

• Journal of Korean Society of societal Security
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• v.1 no.3
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• pp.83-91
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• 2008

Most construction information is being recorded in the form of electronic document. However, design documents generated in current practice are not suitable in share and exchange of information for disaster management. This study proposes how to develop th e XML Schema based semantic model of structural calculation document (SCD) for systematic storage and management of SCD information. in addition, 5 basic data types are developed for various expression forms appeared in the structural calculation documents. A prototype semantic model for steel bridge superstructure is developed based on the proposed method, and it is observed that the proposed method can be effectively used to build a standardized semantic model of SCD.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.31 no.6D
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• pp.849-856
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• 2011

This paper proposes a method for transforming unstructured text contents of engineering documents, which have complex hierarchical structure of subtitles with various heading symbols, into a semi-structured XML document according to the hierarchical subtitle structure. In order to extract the hierarchical structure from plain text information, this study employed a method of document structure extraction which is an analysis technique of the document structure. In addition, a method for processing enumerative text contents was developed to increase overall accuracy during extraction of the subtitles and construction of a hierarchical subtitle structure. An application module was developed based on the proposed method, and the performance of the module was evaluated with 40 test documents containing structural calculation records of bridges. The first test group of 20 documents related to the superstructure of steel girder bridges as applied in a previous study and they were used to verify the enhanced performance of the proposed method. The test results show that the new module guarantees an increase in accuracy and reliability in comparison with the test results of the previous study. The remaining 20 test documents were used to evaluate the applicability of the method. The final mean value of accuracy exceeded 99%, and the standard deviation was 1.52. The final results demonstrate that the proposed method can be applied to diverse heading symbols in various types of engineering documents to represent the hierarchical subtitle structure in a semi-structured XML document.

• Journal of KIBIM
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• v.1 no.2
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• pp.6-11
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• 2011

In domestic construction industry, there is lack of the communication between planning, design, construction and maintenance. This problem makes the omission of information and the loss of cost. Therefore, the introduction of BIM can be a solution about that. BIM manages all information generated during all life-cycle of a structure and consequently maximizes the efficiency of utilizing information. This is done through 3D information model associated with a three-dimensional(3D) parametric CAD. This study proposes the design process of steel box bridge for structural design work of bridge construction project based on BIM. This process has 3D modeling progress done by using the information decided in design phase. When the subject for the proposed process is superstructure of steel box bridge in construction, the structural calculation sheet can be derived with the structural design process based on BIM.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2009.04a
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• pp.348-351
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• 2009

본 논문에서는 구조해석을 위한 PSC 박스 거더교의 객체 정보 모델에 관한 연구를 수행하였다. 대상 교량의 객체 정보 모델을 생성하기 위해서는 수많은 형상 및 치수에 관한 파라미터를 필요로 하게 된다. 따라서 본 연구에서는 이 교량의 설계 목적에 맞는 파라미터를 분류하였고, 파라미터들 사이의 계층구조(Structure)와 상관관계를 정의하였다. 또한 본 연구에서 적용된 인터페이스 프로그램은 3차원 객체 모델에서 출력된 파라미터를 변환하여 구조해석을 위한 입력값으로 변환시켜, 해석 결과값을 구조계산서에 출력시킴으로써 엔지니어가 설계 타당성과 모델변경 요구를 용이하게 할 수 있게 하였다. 그리고 대상 모델에 대한 설계변경은 구조물의 특징에 맞는 상관파라메트릭 방법을 적용하여 신속하게 할 수 있도록 유도하였다. 이 연구를 통해 건설구조물의 설계를 3D 모델로 하기위한 가능성을 확인하였다.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.20 no.3
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• pp.393-404
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• 2007

A concept of multi-layered database is proposed for the integrated operation of bridge information in this study. The multi-layered database is a logically integrated database composed of standardized information layers. The standardized information layers represent the data sets that can be unified, and they are defined by standardized information models. Classification system of bridge component was used as a basis of the multi-layered database, and code system based on the classification system was employed as a key integrator to manipulate the distributed data located on the different information layers. In addition, data level indicating priorities of information layers was defined to support strategic planning of the multi-layered database construction. As a proof of concept, a prototype of multi-layered database for object-oriented 3-D shape information and structural calculation document was built. Data consistency check of the semantically same data in the two different information layer was demonstrated, It is expected that the proposed concept can assure the integrity and consistency of information in the bridge information management.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.24 no.4
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• pp.421-428
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• 2011

The communication of each others is lack between planing, design, construction and maintenance in domestic construction industry. This problem makes the omission of information and the loss of cost. So, the introduction of BIM can be the solution about that. BIM manages all information generated during all life-cycle of a structure and consequently maximizes the efficiency of utilizing information. This is done through 3D information model associated with a three-dimensional(3D) parametric CAD. This study proposes the seismic analysis process of steel box bridge for structural design of bridge construction project based on BIM. The additional process is needed for the purpose that structural data is inherent in the property information of 3D information model. This process has 3D modeling progress done by using the information decided in design phase. The design document of seismic analysis can be derived with the proposed process to steel box bridge.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2007.04a
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• pp.813-818
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• 2007

A method for automatic check of omitted design item in structural calculation document of steel box bridges is proposed. A method for automatic check of omitted design item in structural calculation document of steel box bridges is proposed. Information processing for the proposed method is divided into two steps: automatic generation of document structure in XML Schema Definition (XSD) format and extract omitted design items by using the XML Schema matching technique. The automatic omitted element filter is developed on the basis of the proposed method, and the accuracy of the developed module is examined with case study subjected to existing structural calculation document samples.