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이상기후(폭염, 한파, 미세먼지)에 대응한 주거지 관련 연구 분석
최준혁(Choi, JunHyeok),배웅규(Bae, Woongkyoo) 한국주거학회 2019 한국주거학회 학술대회논문집 Vol.31 No.1
The city symbolizing human civilization and culture is a key place in human life, but today it is blamed for climate change that threatens the lives of mankind. The industrial revolution based on fossil energy has made human life more prosperous, but the resulting emissions of greenhouse gases such as carbon dioxide have been highlighted as the main culprit behind global climate change. Climate change, which threatens human survival, is evolving into an increasingly extreme situation, and is seeking sustainable survival in cities through "reduction" and "adaptation" to cope with such climate change problems around the world, including advanced countries. Starting in the 2000s or later, starting with the establishment of systematic data, this study compiled specific concepts, theories, and cases through the collection and analysis of domestic researchs all the documents and prior research data related to abnormal climate response housing registered until recently 2019. Finally, residential design techniques and elements that can respond to actual abnormal weather were redefined by urban planning and design hierarchy, which resulted in implications.
고속철도 PSC BOX 거더 교량의 내하력 평가에서 재하조건에 따른 충격계수의 차이 분석
최준혁(Junhyeok Choi) 한국방재학회 2023 한국방재학회논문집 Vol.23 No.1
In this study, the load carrying capacity was evaluated using the results of the dynamic load test, instead of the static load test of the field, in the precision safety diagnosis of a high-speed railway PSC BOX girder bridge, and the differences in the impact factor of the bridge according to the load condition of the train and the configuration of the bridge were compared. The impact factor of the bridge was obtained from the measured displacement response via static and dynamic tests for the precision safety diagnosis performed on high-speed railway bridges. The analysis conditions included the location of the sensor, running track of the train, type and span of the bridge, and load condition of the dynamic load test train, test running train, and service train. Consequently, when the impact factor was calculated based on the displacement response of the test running train, instead of the static load test in the load capacity evaluation of the bridge, a difference of -4.96-5.93% was obtained in comparison with the calculation based on the displacement response of the static load test; this corresponds to 0.943-1.053 times the basic load-carrying capacity rate, indicating a difference from the load-carrying capacity rate obtained by the static load test. 본 연구에서는 고속철도 교량의 정밀안전진단에서 현장재하시험의 정적재하시험 대신에 동적재하시험에 의한 결과를 이용하여 내하력을 평가하는 경우 교량의 구성 및 열차의 하중조건에 따른 충격계수의 차이를 비교분석하였다. 교량의 충격계수는 고속철도 교량을 대상으로 수행된 정밀안전진단 시험결과의 정적시험 및 동적시험에 의한 교량의 실측변위응답으로부터 구하였다. 분석조건은 센서의 위치와 열차의 주행선로, 교량의 형식과 지간, 동적주행시험열차, 시험운행열차 그리고 상시운행열차의 주행의 재하조건이다. 그 결과, 교량의 내하력 평가에서 정적재하시험 대신 시험운행열차의 변위응답을 기준으로 충격계수를 산정할 경우 정적재하시험 변위응답을 기준으로 계산한 것에 비하여 -4.96~5.93%의 차이가 발생하였다. 이 값은 기본내하율로 계산하면 0.943~1.053배로서 정적재하시험에 의한 내하율과 차이가 있음을 나타낸다.