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케이블교량의 부재 설계를 지배하는 하중조합에 대한 신뢰도지수 평가
백인열,윤태용,Paik, Inyeol,Yoon, Taeyong 한국전산구조공학회 2014 한국전산구조공학회논문집 Vol.27 No.6
이 논문에서는 케이블교량 설계기준의 설계하중조합에 대한 신뢰도분석을 수행하였다. 설계기준에서 정의한 하중계수와 저항계수를 적용하여 설계된 실제 케이블교량을 대상으로 주 부재별 통계특성과 설계지배 하중조합을 분석하였다. 신뢰도분석을 통하여 하중조합별로 설정된 목표신뢰도지수를 확보됨을 확인하였고, 교량의 중요도를 상향할 수 있는 저항수정계수의 적용성을 검토하였다. 설계변수들이 신뢰도지수에 미치는 민감도 분석을 통하여 케이블의 신뢰도에 중요한 영향을 주는 요소를 분석하였다. 이를 통하여 설계기준의 안전계수들을 적용한 설계를 통하여 케이블교량의 목표신뢰도지수를 확보할 수 있음을 확인하였다. In this paper the reliability analyses of the cable-supported bridge design code which is recently issued in Korea are performed and the results are presented. Governing load combinations for the member design and the statistical properties of the main members are introduced and the analysis is performed using an example cable-stayed bridge for which the design is performed following the load and resistance factors defined in the design code. The reliability analysis shows the target reliability index can be achieved by applying load and resistance factors and the application of the resistance modification factor can enhance the reliability level if the importance of the bridge needs to be increased. The sensitivity analysis reveals that decreasing uncertainty of the cable strength is critical for obtaining the target reliability index. The study results show that the design using the load and resistance factors of the code can achieve the target reliability indexes for the design of cable supported bridge.
환경친화적 유통공간의 소비효용이 재방문의도에 미치는 영향
백인열(In-Yeol Paik),강우성(Wooseong Kang) 한국유통과학회 2018 유통과학연구 Vol.16 No.2
Purpose – Recently the importance of green consumption and corporate social responsibility has been increasing, thereby enhancing the importance of green consumption space as well. The retail space, as a representative consumption space, is now consuming more energy by introducing bigger retail space, 24-hour operation, cutting-edge equipment, and manless checkout system. Especially for retailers, who are constantly interacting with consumers, not only the economic consideration but also the consumer experience via retail service and physical retail space is crucial for their success. Therefore, this study intends to understand the main factors of motivating consumer perception about green retail space. In addition, we further investigate the mediating and moderating variables to encourage revisit intention and green retail space image. Research design, data, and methodology - In order to test our hypotheses with two models, we conducted a survey using questionnaires. In model 1, 356 respondents were surveyed to determine whether consumers’ green attitudes and behaviors enhance environmentally friendly perception on retail space properties. In model 2, a questionnaire survey was conducted on 69 consumers who have experience in green retail space. Questionnaire surveys were conducted with on-line panels in Korea and analyzed using regression model and Hayes’ PROCESS macro. Results – We found that consumers with green attitude put more importance on the attributes of green retail space. Also, the utility of the green retail space was found to be significant in emotional and social benefits. And, the consumers, who perceived the importance of green retail space, show higher revisit intentions. The emotional and social utilities have significant positive effects on revisit intention through green retail space image. Conclusions – This study demonstrates that a green retail space can induce positive consumer utility, thereby increasing green retail
철도교량 설계기준의 표준열차하중에 의한 활하중 모멘트 비교
백인열(Inyeil Paik),윤태용(Taeyong Yoon),박수민(Sumin Park) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.5
철도교설계기준에 대한 신뢰도 기반 설계기준 개발의 일환으로 현행 국내 및 국외의 주요 설계기준의 철도하중에 의한 설계모멘트를 구하여 비교 분석한다. 국내 설계기준에는 최근 새로운 하중모델인 KRL-2012이 도입되어 설계에 적용한다. 국외 주요 설계기준으로 Eurocode에서는 LM-71, SW/0, SW2의 하중모델을 적용하고 있다. 이들 하중과 함께 적용하는 하중계수는 교량설계에 있어서 파괴에 대한 안전율 수준을 나타내게 되며, 설계기준에 따라 고유한 값을 정의하고 있다. 이 연구에서는 철도교량 설계에 적용하는 표준열차하중모델에 의한 계수모멘트와 비계수모멘트를 교량의 지간별로 구하여 그 결과를 비교 분석한다. As part of the development of design criteria based on the reliability of the railway bridge, the design moment by standard train load model of design codes is compared. The new load model KRL-2012 of the domestic code is recently introduced and applied to bridge design. Eurocode specifies design load model of LM-71, SW/0, SW2. Load factors accompanying to these design load model are used in order to obtain a certain level of structural safety against failure. Each design code defines a distinctive value of safety level. In this study, the factored and unfactored moments by the standard load models are obtained and compared for railway bridges.