• Proceedings of the Korean Institute of Building Construction Conference
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• 2003.11a
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• pp.33-36
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• 2003

Time-dependent axial shortening in the cores and columns of tall concrete buildings requires special attention to ensure proper behavior for strength of the structure and the nonstructural clement. The effects of column shortening, both elastic and inelastic, take on added significance and need special consideration in design and construction with increased height of structures. In this paper, the compensation method of column shortening are introduced. It could be conclued that the survey is a significant factor for the compensation of column shortening.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2012.04a
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• pp.3-6
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• 2012

우리나라 목조 문화재 건축물은 재료특성상 화재위험에 항상 노출되어 있다. 특히 2005년 4월 4일 발생한 양양산불로 인해 낙산사의 주요 건축물과 동종 누각이 소실되었고 2008년 2월 10일 발생한 숭례문 화재로 인해 숭례문 목조구조물 대부분이 소실되었다. 목조 문화재 건축물 주요 구조재의 수종에 대한 데이터베이스는 현재 우리나라에 아직 갖춰져 있지 않고 있어 본 연구를 통해 세계문화유산으로 등재된 경주 양동마을의 목조 건축물에 대한 수종분석을 실시하였다. 그 결과 기둥과 보 부재 수종은 소나무 > 느티나무 > 상수리나무 순으로 구성되어 있고 도리 부재는 소나무 > 느티나무 > 전나무 순으로 구성되어진 것으로 나타났다. 따라서 소나무, 느티나무, 상수리나무, 전나무에 대해 열방출율, 총열방출량, 착화온도 등에 대한 분석을 실시하였다. 그 결과 각 수종에 따라 연소특성에 차이가 있음을 알 수 있었고 향후, 연소특성 데이터베이스를 통해 산불로 인한 화재성상 및 목조 화재성상 예측에 활용하고자 한다.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2003.05a
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• pp.33-36
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• 2003

Time-dependent axial shortening in the cores and columns of tall concrete buildings requires special attention to ensure proper behavior for strength of the structure and the nonstructural element. The effects of column shortening, both elastic and inelastic, take on added significance and need special consideration in design and construction with increased height of structures. In this paper, the compensation method of column shortening are introduced. It could be concluded that the survey is a significant factor for the compensation of column shortening.

• Magazine of the Korea Concrete Institute
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• v.14 no.1
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• pp.19-22
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• 2002

건축공학과를 졸업하고 구조설계 실무 분야로 진출하는 이의 비율이 3~5%라는 비공식 통계가 있다. 이 통계 숫자가 말하듯이 건축구조설계업은 건축공학과 졸업자가 택하는 소수의 직업군에 속한다. 재학시에는 콘크리트 구조, 강구조 및 여타 구조 과목을 해당 분야를 전공한 교수진으로부터 각각 배우지만 실무에서는 맡겨진 프로젝트에 의해 구조 형식이 결정되고 스스로의 노력과 회사 내 시스템을 통해 해결해야 하므로 구조 형식 전반에 걸친 프로패셔널(professional)이 되어야 한다. 콘크리트에 대한 전문지식도 학교에서는 콘크리트의 기본 사항, 수직 및 수평 부재의 단면 설계 연습 등을 통해 기본적인 단계의 지식을 습득한다. 그러나 실무에서는 구조 시스템, 콘크리트 프레임의 거동 및 수많은 부재의 단면 설계 등과 같이 포괄적인 지식이 주종을 이룬다.(중략)

• 레미콘
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• s.75
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• pp.6-21
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• 2003

• Journal of Korea Multimedia Society
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• v.15 no.3
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• pp.408-416
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• 2012

As increasing interests for cultural content, 3D restoration about the valuable traditional architectures is in progress, nowadays. Digital restoration is generally performed with using new IT technology and equipments such as 3D scanner. From the view points of making better use of the 3D data, the methodology for 3D restoration leaves much room for improvement. When using 3D scanner, it is possible to get precise 3D data for exterior of the building but huge data size and insufficient information for the wooden intra structure might be obstacles for using them as a source of various digital contents. In traditional wooden structure, the binding rules for corresponding architectural components are important factor for realizing the architectural culture at that times. In this paper, we develop a design tool and architectural components reflecting the wooden intra structure. Moreover, we propose a new 3D restoration method from the design tool, which is good for making contents offering useful information for processes of construction and binding rule in a real time just at a glance.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.04a
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• pp.334-339
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• 2011

이 연구에서는 내화천장구조 재료의 고온 열특성을 파악하여, 건축물 화재시 천장구조에 대한 보다 정확한 화재성상예측을 위한 실험적 자료로 제시하고자 한다. 건축물의 화재성상 예측은 내화설계 시 반드시 필요하며, 화재성상예측을 위해서는 화재하중, 작용외력, 안전계수 및 설계용 정수의 합리적인 설정이 중요하다. 화재하중 및 작용외력 등은 건축물의 부재가 지니는 하중조건에 대한 화재시의 부재 안정성 예측에 관계되는 부분이며, 설계 시 필요한 데이터 중 내화천장구조 재료의 고온 열특성 값은 화재발생 구획의 화재온도가 주요 구조부재에 전달되는 정도를 예측할 수 있는 인자로 볼 수 있다. 따라서 내화천장구조 재료의 고온 열특성 값 설정은 화재발생 공간의 온도범위($20{\sim}1000^{\circ}C$)에 걸쳐 평가 및 분석되어야만 정확하고 신뢰성 있는 화재발생 예상 공간의 부재 온도 및 안전성 분석이 가능하다. 이에 국내 건축구조물에 사용되고 있는 대표적인 내화피복 재료인 방화석고보드, 텍스, 암면에 대해서 $20^{\circ}C{\sim}900^{\circ}C$까지의 열전도율을 측정하였다. 실험결과 방화석고보드와 텍스의 경우 약 0.15 W/m K까지 일정하게 증가하였다. 암면의 경우 약 $700^{\circ}C$까지는 방화석고보드나 텍스에 비해 열전도율이 낮게 나타났지만, $800^{\circ}C$ 지점부터 용융 및 탄화가 진행되면서 열전도율이 급격히 상승하는 것으로 나타났다.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.35 no.3
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• pp.149-158
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• 2022

As a bridge ages, its mechanical properties and structural performance deteriorate, degrading its seismic performance during a strong earthquake. In this study, the aging of piers and bridge bearings was quantified in several stages and reflected in the analysis model, enabling the evaluation of the member-level seismic fragility of these bearings. Moreover, by assuming that the failure mechanism of a bridge system is a series system, a method for evaluating the system-level seismic fragility based on the member-level seismic fragility analysis result is formulated and proposed. For piers with rubber and lead-rubber bearings (members vulnerable to aging effects), five quantitative degrees of aging (0, 5, 10, 25, and 40%) are assumed to evaluate the member-level seismic fragility. Then, based on the result, the system-level seismic fragility evaluation was implemented. The pier rather than the bridge bearing is observed to have a dominant effect on the system-level seismic fragility. This means that the seismic fragility of more vulnerable structural members has a dominant influence on the seismic fragility of the entire bridge system.

• Journal of the Korean Wood Science and Technology
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• v.31 no.2
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• pp.58-68
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• 2003

Capacity assessment of structural member must be ahead of the safety assessment of wooden traditional building. Capacity assessment of structural member has been dependent on empirical method with visual inspection even now. Safety assessment of building, however, can be more correct and reasonable provided non-destructive evaluation technique that scientific and logic would be used to evaluate the capacity of structural member. For that purpose, non-destructive evaluation technique was applied to column among many structural members of wooden traditional building to examine the possibility of capacity assessment of structural member. And then, those data will be used as a basic data for capacity assessment of structural member in a following study. Specially, deterioration progress levels of column according to exposed condition were measured. Similar results were obtained as compared with results of visual inspection, so there was a good possibility of application for non-destructive evaluation technique.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.35 no.5
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• pp.317-324
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• 2022

In this paper, an analysis method that considers the initial static displacement of structural members using an equivalent single-degree-of-freedom system is presented. Newmark's dynamic analysis algorithm was improved to consider the effect of the initial static displacements of structural members. The effect of the initial static displacement on the maximum response according to the assumed duration of the blast load and natural period of the member was investigated. The effects of positive and negative static displacements on the maximum dynamic responses of structural members subjected to a positively applied blast load were also studied. Modified response charts for the shock-type and pressure-type waves are presented so that static displacements can easily be considered. Using a design example, we demonstrate the significance of the modified response chart that considers the static displacement. Based on the results of this study, the maximum response of a the structural member can be easily obtained whilst considering its initial static displacement. The modified response chart presented in this study can be used for the structural design of plants and military facilities.