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장유식,윤원섭,유광호 한국산업융합학회 2022 한국산업융합학회 논문집 Vol.25 No.6
In this study, a seismic reinforcement method was studied to improve the seismic performance of aged bridges. The construction method developed in this study is a compression-only bridge seismic reinforcement method, and has excellent economic feasibility and workability compared to existing construction methods. In the case of aged bridges, there was an advantage that could compensate for the disadvantages that it was difficult to apply the existing reinforcement method. For the newly developed method, the effect of reinforcement was analyzed through resin analysis. As a result of the analysis, when the reinforcement was applied, the axial reinforcement effect was excellent, and the field applicability was excellent as it showed better results than the existing seismic isolation backing method.
COVID-19 시기에 한국, 미국, 중국과의 서비스 무역 경쟁력 분석에 관한 연구
장유식,조일림,라공우 한국통상정보학회 2023 통상정보연구 Vol.25 No.4
본 연구에서는 한․중․미의 2020년 COVID-19 팬데믹 상황 이전과 이후의 경쟁력을 분석하기 위해 현시비교우위(RCA), 대칭적 현시비교우위지수(SRCA), 무역특화지수(TSI) 등을 이용하였다. 분석 결과 첫째, 한국은 대부분 RCA지수값은 1보다 작은 것으로 SRCA지수 값은 대부분 음수(-)로 측정되어 비교 열위에 있고, 미국과 중국에 비해 경쟁력이 낮은 것으로 나타났다. 둘째, 한국의 대 세계 TSI지수를 보면, 전반적으로 미국과 중국에 비해 낮은 경쟁력으로 수출 특화보다는 수입 특화에 가깝다고 볼 수 있다. 이에 한국의 서비스 무역 경쟁력을 강화하기 위해서는 서비스 수출 기업의 금융지원 전략, K-콘텐츠 수출 기반을 강화하고 세계적 기업 육성을 위한 수출 투자 펀드 조성 필요, 관광 부분 경쟁력을 강화하기 위한 정책 개발, 소프트웨어(SW)나 정보통신기술(ICT) 관련 유망 품목 육성과 의료서비스 수출 활성화를 위해 규제완화, 브랜드화 등이 필요하다. In this study, Revealed Comparative Advantage (RCA), Symmetric RCA, Trade Specialization Index (TSI) were used to analyze the service trade competitiveness of Korea, China, and the United States. As a result of the analysis, first, Korea is at a comparative disadvantage as most RCA index values are less than 1 and most SRCA index values are measured as negative numbers (-), Korea was found to be less competitive than the United States and China. Second, looking at Korea's global TSI index, it can be seen that Korea is closer to import specialization than export specialization due to its overall lower competitiveness compared to the United States and China. Accordingly, in order to strengthen Korea's service trade competitiveness, financial support strategies for service export companies and the K-content export base must be strengthened. And there is a need to create an export investment fund to foster global companies and develop policies to strengthen the competitiveness of the tourism sector.There is a need to foster promising items related to software (SW) and information and communication technology (ICT), deregulation and branding are needed to revitalize medical service exports.
SSI해석을 통한 압축전담 교량 내진보강공법 거동 특성 연구
장유식,윤원섭,유광호 한국산업융합학회 2022 한국산업융합학회 논문집 Vol.25 No.6
In this study, the reinforcement effect of the compression-only bridge seismic reinforcement method, which is mainly applied to old bridges, was studied through SSI analysis. As the analysis conditions, acceleration magnitudes of 0.1g, 0.15g, and 0.2 g were applied, and long-period and short-period seismic waves were applied. As a result of the analysis according to the assumed ground characteristics and structure size, the horizontal displacement at the reinforced section was reduced by about 9%, and the long-period seismic wave had a 95% larger displacement than the short-period seismic wave. In addition, an increase in acceleration of 0.1g resulted in a displacement of about 50%, and a large increase in displacement was observed in long-period seismic waves. As a result of the analysis, in the case of the compression-only bridge seismic reinforcement method, there was a reinforcing effect, so the field applicability was excellent.