Because stage cable-bridge have long spans and large members, their movements and geometrical changes by temperatures tend to be bigger than those of small or medium-size bridge. Therefore, it is important for maintenance engineers to monitor and assess the effect to temperature on the cable-supported bridges. To evaluate how much the superstructure expands or contracts when subjected to changes in temperature is the first step for the maintenance. Thermal movements of a cable-stayed bridge in service are evaluated by using long-term temperatures and displacements data.

이 연구에서는 플랜트 지하구조물의 상태평가를 위해 국내외 기준을 확인하고 플랜트 지하시 설의 핵심평가 요소 도출을 통하여 향 후 플랜트 지하구조물의 상태평가를 위한 기초 자료로 활용하고자 한다.

일본은 칠기의 나라로 알려질 만큼 옻칠의 사용이 보편화되어있는 나라다. 옻칠을 예술적으로, 혹은 일상생활용으로 사용 하고 있는 나라들 중 일본이 차지하고 있는 위상은 독보적이라고 할 수 있다. 영어 소문자로 japan이 칠기를 의미하는 것 이 그 대표적인 예이다. 본 연구는 이러한 일본이 어떻게 자신들의 옻칠문화를 지켜왔는지, 또 매스미디어로 대표되는 현대 사회에 적응해나가는지에 대하여 사례중심으로 살펴보려 한다. 전통을 고수하는 것만이 전통문화의 보존이 아닌 것이기에 일본의 경우를 참고하여 한국의 반면교사로 삼으려는 바이다.

Creep Factor using the temperature data can be measured during construction of the PSC more accurate construction of the bridge to enhance the reliability of configuration management. In addition, even sag configuration management using the temperature data without installing the expensive laser displacement meter to be installed for the deflection calculation is expected to be applied.

Data from the strain gauge and temperature sensor through the analysis in the future appear to be capable of vertical construction step analysis Behavior of Concrete Box Girder is judged to be high usability.

The main purpose of this study is to develop the advanced structural health monitoring techniques of cable-supported bridges. The research and development about two main topics has been performed as follows: The vision-based cable monitoring technology using cable moving robot and The long-term displacement monitoring technology of bridge structures using Global Navigation Satellite System (GNSS). Therefore, the 100-m-length cable vibration test facility, was selected as the test bed.

This study was conducted to examine for serviceability of GFRP for application of Slip-Form. As a result, Flexure performance of GFRP module is similar to steel material. And accumulated wear volume of GFRP module is 0.02% when sliding distance reaches at 1000m.

This study presents a technical overview of snow and ice accretion on cable-stayed bridges and suspension bridges. Specially, it focuses on measures against snow or ice falling into bridge decks. Many different types of de-icing and anti-icing are discussed in this paper.

In this study, measured data of cable-supported bridge’s thermal expansion and contraction were analyzed. To evaluate structural behaviors by temperature variations, measured data were compared with theoretical values by correlation analysis between thermal movements and temperatures. Additionally, the cumulative displacements were analyzed. Through the analysis of the results, the evaluation methods of cable-supported bridge's thermal expansion and contraction is suggested.

The purpose of the present study is to construct a rural development strategy from the nexus between spatial changes in specialized crops and suitable cultivation area of the crops. This paper pays particular attention to identify product life cycle of specialized crops in rural areas and estimate the impact of climate change on alterations in spatial distribution of the crops. In order to do so, first of all, this study applies multi-level model (Random coefficient model) to estimate the regional coefficient of five orchard crops. It utilizes the data 1995 to 2010 Korea Agricultural Census. Futhermore, it also adopts overlay analysis by ArcGIS to identify the development path of the crops and the relationship with climate change. Based on the results, it suggests a mechanism activating regional agriculture. The findings propose re-searching and relocating specialized regions of the crops. Especially, it proves each rural area can drive the new agricultural strategy to strengthen regional agriculture by estimating the relationship between development of specialized crops and suitable cultivation areas. For instance, shifting specialized crops in particular regions and enriching genetic or species varieties can be primary measures and it will contribute to improve the reliable base for income sources in the rural communities. This paper also offers specific policy implications regarding rural development plans in response to crops' life cycle and climate changes.

록볼트는 주변 지반의 지보 기능을 유리하게 활용하기 위한 부재로서 일반적으로 소요의 강도 이상을 가진 강재로 된 이형봉강을 활용하고 있다. 그러나, 부식성 요소가 많은 지하수 조건에서는 강재의 부식으로 인한 록볼트의 파괴로 터널 및 사면안정의 보수, 보강 및 유지관리 문제가 많이 발생하게 된다. 이러한 문제를 해결하고 영구적으로 사용가능한 터널 지보재로 활용하기 위한 실질적인 거동을 모사하여 GFRP 록볼트의 거동에 대한 실험적 평가를 실시하였다. 이 연구는 GFRP 록볼트의 인장성능 평가시험 및 전단성능 평가시험을 통해 도출된 GFRP 록볼트의 구조적 특성을 바탕으로 구조해석을 통한 사면안정해석을 실시하여 안전율을 평가하였다. 실험 결과 기존에 사용하던 강재 록볼트의 대체 재료로서 충분히 터널 지반의 안정성을 확보 할 수 있을 것으로 판단된다.

As people get aged, we need to pay more attention to the elderly living condition with respect to welfare policy. The present study focuses on housing condition of elderly people living in rural area, and analyzes its determinants, periodical difference, and regional disparities, incorporating an index of minimum housing standard. This study applies multi-level logit model that has a strong statistical advantage that can take random aspects of household and regional context into account. We found that married couple household, presence of economically-active family members, higher education, specialized profession, migration and higher level of land price tend to lower the probability of residing in substandard housings. We also found that housing conditions for elderly people prove to be different by regions and it is particularly noticeable in mountainous rural areas in Gyeongsangnam-do and Gyeongsangbuk-do with the poorest elderly housing conditions. Results also implies that housing welfare policies should be implemented differently considering the target groups based on regional differences. We conclude with some additional policy implications for the elderly living in rural areas.