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특수 및 준특수 상세에 따른 철근콘크리트 전단벽의 비선형 내진거동 해석 (Analysis of Nonlinear Seismic Behavior of Reinforced Concrete Shear Wall Systems Designed with Special and Semi-Special Seismic Details)

  • 윤성준;이기학;천영수;김태완
    • 한국지진공학회논문집
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    • 제17권1호
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    • pp.43-51
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    • 2013
  • In this paper, analytical models for reinforced concrete shear wall systems designed based on Korean Building Code (KBC2009) are proposed, which have special and semi-special seismic details and are compared with experimental results for a verification of analytical models. In addition, semi-special seismic details aimed to improve constructability and enhance economic efficiency were proposed and evaluated. The analytical models were performed based on nonlinear static and dynamic analysis. Through the nonlinear analyses, two seismic details showed the similar seismic behavior from the cyclic test and the analytical models for the two different seismic details represented the behavior in terms of the initial stiffness, maximum strength and strength degradation. And newly proposed seismic details(semi-special) provided with similar hysterestic behavior as well as the maximum drift.

물량저감 철근상세를 갖는 중공 철근콘크리트 교각단면에 관한 매개변수 연구 (Parametric Study on Hollow Reinforced Concrete Bridge Column Sections with Reinforcement Details for Material Quantity Reduction)

  • 김태훈;김호영;이재훈;신현목
    • 한국지진공학회논문집
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    • 제17권4호
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    • pp.159-169
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    • 2013
  • The purpose of this study is to investigate the inelastic behavior of hollow reinforced concrete bridge column sections with reinforcement details for material quantity reduction and to provide the details and reference data. Among the numerous parameters, this study concentrates on the shape of the section, the reinforcement details, the diameter of the transverse reinforcement and loading types. Eighteen column section specimens were tested under quasi-static monotonic loading. In this study, the computer program RCAHEST (Reinforced Concrete Analysis in Higher Evaluation System Technology) was used. A modified lateral confining effect model was adopted for the hollow bridge column sections. This study documents the testing of hollow reinforced concrete bridge column sections with reinforcement details for material quantity reduction and presents conclusions based on the experimental and analytical findings.

개구부 격리형 시스템으로 보강된 철근콘크리트 골조의 내진성능 (Seismic Performance of Reinforced Concrete Frame Retrofitted with Opening-Isolated Type System)

  • 박완신;김선우;정현석
    • 대한건축학회논문집:구조계
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    • 제36권2호
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    • pp.137-144
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    • 2020
  • The purpose of this study is to experimentally evaluate the effect of improving seismic performance by applying the details of seismic reinforcement to the reinforced concrete frame with non-seismic details while maintaining the original opening shape. In this study, based on CF specimens with specific seismic details, a total of four full scale specimens were designed and fabricated. The main variables are the width and spacing of steel dampers installed in the upper and lower parts of seismic reinforcement details, and the presence or absence of torsion springs installed in the hinges. As a result of the test, it was evaluated to be helpful for seismic retrofit and opening isolation of steel dampers installed at the upper and lower parts of the seismic reinforcement details and torsion springs installed at the joints. In particular, CFR2S specimens with torsion springs showed the best performance in terms of strength, stiffness and energy dissipation capacity with increasing displacement angle.

파워숄더 재킷의 어깨 구성 방법과 디테일 대응 분석 (A study on the shoulder composition methods of power shoulder jackets and corresponding details)

  • 박정아;이정란
    • 복식문화연구
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    • 제29권3호
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    • pp.388-405
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    • 2021
  • This study classifies the compositional methods of power shoulder jackets from 1980 to the present. It analyzes the relevance of jacket details according to how the power shoulder changes and its compositional methods by era. The research subdivides shoulder compositional techniques into seven, based on shoulder variation, sleeve variation, and the body and sleeve combination. The researcher investigates the frequency and trends of composing shoulders and analyzes details pertaining to the silhouette, jacket length, collar shape, and front closure. The most common method of shoulder composition is an angular shoulder variation. The others are a rounded shoulder variation, puffed sleeve, sleeve variation using pattern incision, raglan and kimono sleeves, and a shoulder variation that expanded the angle and width. The frequency differs slightly for each era. The relationship between shoulder compositional methods and details of power shoulder jackets is statistically significant, showing period-related differences. The homogeneity analysis results reveal that the shoulder composition of power shoulder jackets, the times, and details fall into distinct groups. This analysis shows that the silhouette, length, collar, and front closure of the power shoulder jacket differ depending on the power shoulder's compositional methods. Moreover, the shape of the power shoulder jacket is distinctly different. One can use this data to help develop the power shoulder jacket design by reflecting the details of shoulder compositional methods and changing trends over time.

이슬람정원에서 디테일이 장소성에 미친 영향 -'사자의 중정'을 대상으로 - (The Influence of Details on the Sense of Place in Islamic Gardens - Focusing on 'the Courtyard of the Lions' -)

  • 윤미방;김한배
    • 한국조경학회지
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    • 제38권5호
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    • pp.122-133
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    • 2010
  • 인간은 장소와 일체감을 이루고자 하며, 이를 통해 자신의 정체성과 장소의 정체성을 동시에 이루어간다. 인간은 자신들이 속한 문화와 환경에 따라 고유한 관념을 형성하고, 그 관념은 상징을 통해 장소에 표현되는데, 상징은 공간구조와 이를 형태화하는 디테일에 의해 장소에 구체화된 형태를 나타낸다. 본 연구는 이슬람정원을 대표하는 '사자의 중정'을 대상으로 공간구조와 디테일을 비교 검토하여 둘의 상호보완적 관계와 디테일이 장소성에 미치는 영향을 고찰하고자 하였다. 양자 간의 비교는 내재하는 상징과 의미, 디자인 언어, 형성배경과 디테일을 통한 장소체험의 측면에서 이루어졌다. 먼저, 공간구조는 차하르바그의 기본형태로 구성되어 코란에서 표현하는 낙원을 상징하였다. 이슬람교, 아랍문화, 스페인 무슬림왕조의 생활양식을 배경으로 공간구조가 형성되어 전통적인 이슬람정원과 크게 다르지 않았다. 디테일은 공간구조를 형태화하는 동시에 낙원, 왕권, 신성, 자연 등을 상징하고, 이슬람교, 스페인 무슬림왕조의 문화, 아랍문화, 안달루시아의 지역성, 무데하르 양식 등을 나타내고 있다. 디테일은 스페인 무슬림왕조의 일상에 생동감과 변화감을 주어 폐쇄적인 궁전생활에 활력을 주며, 안달루시아지역 왕조의 특성을 갖는 사자조각상으로 중정의 중심을 이루어 다른 이슬람정원에서 볼 수 없는 독특한 분위기를 자아내었다. 사자의 중정의 디테일은 오감을 통한 체험의 대상이며, 인간과 장소가 하나가 되도록 해주어 장소성을 형성했음을 알 수 있었다. 사자의 중정의 디테일을 통해 스페인 무슬림왕조의 일상과 이상을 파악할 수 있었고, 그들과 정원이 일체감을 이루었으며, 디테일은 공간구조보다 더 풍부한 의미와 디자인언어를 담고 있음을 알 수 있었다. 결론적으로 디테일은 장소성을 형성하는 중요한 체험적 대상임이 파악되었다.

한국목록규칙과 중국문헌편목규칙의 고전자료 목록기술규칙 비교 분석 (A Comparative Analysis of Classical Data in KCR 4 and CCR 2)

  • 한미경
    • 한국문헌정보학회지
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    • 제47권3호
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    • pp.275-293
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    • 2013
  • 이 연구는 고전자료 이용에 필요한 목록기술규칙의 이해와 동양 고전자료 목록(서지기술) 네트워크를 위하여 한국목록규칙 4판(KCR 4)과 중국문헌편목규칙 2판(CCR 2)에서의 고전자료의 목록기술 규칙을 다음과 같이 비교 분석하였다. 첫째, 기술총칙의 비교를 위하여 기술의 대상과 기술사항의 구성, 기재순위와 구두점 그리고 기술의 정보원을 대상으로 진행하였다. 그 결과 KCR 4는 책임표시와 판사항의 정보원 규정이 상세하며, CCR 2는 출판 발행사항 및 총서사항의 정보원 규정이 상세하였다. 둘째, 세부사항의 비교를 위하여 표제와 책임표시사항, 판사항, 발행사항 및 형태사항 그리고 주기사항을 대상으로 진행하였다. 그 결과 판종의 기술과 발행사항의 경우 KCR 4가 상세하게 규정하고 있으며, 주기사항의 경우 CCR 2의 제요가 특징적이었다.

삼각망 철근상세를 갖는 중실 철근콘크리트 기둥의 성능평가 (Performance Assessment of Solid Reinforced Concrete Columns with Triangular Reinforcement Details)

  • 김태훈;이승훈;이재훈;신현목
    • 콘크리트학회논문집
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    • 제28권1호
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    • pp.75-84
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    • 2016
  • 이 연구의 목적은 삼각망 철근상세를 갖는 중실 철근콘크리트 기둥의 성능을 파악하는데 있다. 제안된 철근상세는 경제성과 합리성을 갖으며 공사기간의 단축을 가져올 수 있다. 삼각망 철근상세를 갖는 중실 철근콘크리트 기둥 실험체에 일정 축하중 하에서 횡방향 반복하중을 가하는 준정적 실험을 수행하였다. 사용된 프로그램은 철근콘크리트 구조물의 해석을 위한 RCAHEST이다. 사용된 해석기법은 조사된 실험체에 대하여 하중단계에 따라 성능을 비교적 정확하게 예측하였다. 그 결과 제안된 삼각망 철근상세는 기존 철근상세와 동등 이상의 소요성능을 보임을 확인하였다.

Research on the longitudinal stress distribution in steel box girder with large cantilever

  • HONG, Yu;LI, ShengYu;WU, Yining;XU, Dailing;PU, QianHui
    • Steel and Composite Structures
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    • 제44권5호
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    • pp.619-632
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    • 2022
  • There are numerous structural details (Longitudinal beam, web plate, U-ribs and I-ribs) in the top and bottom plates of steel box girders, which have significant influences on the longitudinal stress (normal stress) distribution. Clarifying the influence of these structural details on the normal stress distribution is important. In this paper, the ultra-wide steel box girder with large cantilevers of the Jinhai Bridge in China, which is the widest cable-stayed bridge in the world, has been analyzed. A 1:4.5 scale laboratory model of the steel box girder has been manufactured, and the influence of structural details on the normal stress distribution in the top and bottom plates for four different load cases has been analyzed in detail. Furthermore, a three-dimensional finite element model has been established to further investigate the influence regularity of structural details on the normal stress. The experimental and finite element analysis (FEA) results have shown that different structural details of the top and bottom plates have varying effects on the normal stress distribution. Notably, the U-ribs and I-ribs of the top and bottom plates introduce periodicity to the normal stress distribution. The period of the influence of U-ribs on the normal stress distribution is the sum of the single U-rib width and the U-rib spacing, and that of the influence of I-ribs on the normal stress distribution is equal to the spacing of the I-ribs. Furthermore, the same structural details but located at different positions, will have a different effect on the normal stress distribution.

내부 매입형 철골조로 보강된 철근콘크리트 건물의 내진 성능평가 (Seismic Performance Evaluation of Reinforced Concrete Buildings Strengthened by Embedded Steel Frame)

  • 김선웅;이경구
    • 한국지진공학회논문집
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    • 제24권1호
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    • pp.29-37
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    • 2020
  • This study is to investigate the effect of a retrofitted reinforced concrete frame with non-seismic details strengthened by embedded steel moment frames with an indirect joint, which mitigates the problems of the direct joint method. First, full-scale experiments were conducted to confirm the structural behavior of a 2-story reinforced concrete frame with non-seismic details and strengthened by a steel moment frame with an indirect joint. The reinforced concrete frame with non-seismic details showed a maximum strength of 185 kN at an overall drift ratio of 1.75%. The flexural-shear failure of columns was governed, and shear cracks were concentrated at the beam-column joints. The reinforced concrete frame strengthened by the embedded steel moment frames achieved a maximum strength of 701 kN at an overall drift ratio of 1.5% so that the maximum strength was about 3.8 times that of the specimen with non-seismic details. The failure pattern of the retrofitted specimen was the loss of bond strength between the concrete and the rebars of the columns caused by a prying action of the bottom indirect joint because of lateral force. Furthermore, methods are proposed for calculation of the specified strength of the reinforced concrete frame with non-seismic details and strengthened by the steel moment frame with the indirect joint.

레트로 로맨틱 패션의 시각적 평가 (Visual Evaluation of Retro-Romantic Fashion)

  • 조말희;이명희
    • 복식문화연구
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    • 제17권3호
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    • pp.523-534
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    • 2009
  • The purpose of this study is to categorize the dimensions of the visual evaluation of the costume details of the retro romantic fashion and to research on the costume details and the visual evaluation by evaluators' gender, age, and major, and on their preferences. Quantitative research were conducted for this study. Based on the pictures, 10 costume details were selected for the survey questions and data were collected. All 446 subjects who participated in this research were college students(males and females) residing in or near Seoul. Data were collected in September, 2008. The collected data were statistically analyzed using SPSS which included: factor analysis, Cronbach's $\alpha$ reliability analysis, three-way ANOVA, two-way ANOVA, one-way ANOVA, Duncan's multiple range tests, and the t-test. The results of visual evaluation of retro romantic fashion are as follows: First, as a result of the factor analysis of the costume detail evaluation, five factors including attractiveness, decorativeness, cuteness, retro, and femininity surfaced. Second, the gender difference in the results of the research revealed that women rated decorative, cute, retro, and feminine characteristics higher than men did. Third, there were significant interactive effects in attractiveness and femininity depending on costume details and evaluators' gender. Fourth, subjects majoring in fashion valued attractiveness and femininity of the stimulus over non-fashion majoring subjects. Fifth, there were significant differences in the preferences of costume details depending on gender.

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