This study carried out and analyzed survey data on captains and mates of Korean coastal large trawlers in order to examine factors affecting body abnormalities and fatigue on bridge teams from work and environment at bridges of trawlers. The summarized result may be summed up as follows: multiple regression analysis with body pain and fatigue as dependent variables yields t-values of –2.559 (p<0.05) and –3.928 (p<0.05) respectively. From the result, environment at bridges (views, spaces and exhaust) were negative factors in affecting bridge workers’ pain and fatigue. Thus, it is determined to secure available spaces to improve the workers’ views through windows in front of, besides and rear bridge and create more pleasant atmospheric environment at bridge.

본 논문에서는 진동중인 교량 단면에 작용하는 풍하중을 산정하고 그에 따른 플러터 발생풍속을 예측하기 위하여 분산형 전산환경을 활용한 수치해석 연구를 수행하였다. 분산형 전산환경은 웹 포탈을 기반으로 수치해석 환경을 제공하는 일종의 수치풍동 시스템으로서, 전산유체역학 (CFD: Computational Fluid Dynamics) 에 대한 전문지식이 부족한 사용자들도 격자생성, 수치해석자를 이용한 계산, 가시화 등의 전 과정을 편리하게 수행할 수 있는 차세대 토목분야 계산 환경이다. 본 연구 환경의 검증을 위해 수치해석자에 적용된 지배방정식은 2차원 비정상 Navier-Stokes 방정식으로서, 교량의 움직임을 모사하기 위하여 동적격자 기법을 도입하였다. 또한 계산된 비정상공기력을 적용하여 플러터 발생풍속을 산정하였으며, 그 결과는 기존의 실험결과와 잘 일치함을 확인하였다.

The durability of the steel structure can be affected by atmospheric corrosion environments as temperature, humidity, airborne salt etc.. However, atmospheric corrosion environments can be locally changed depending on structural condition and shape. To estimate the local atmospheric corrosion environments depending on structural member exposed to the marine environment, corrosion level of structural member in steel bridge was examined from exposure tests.

Corrosion durability of steel member can be related to its installed environmental conditions such as relative humidity, rainfall, atmospheric temperature, and air pollution(SO2, chloride). Also its installed environmental condition may differ depending on the shape of structural member. Therefore, In this study, to evaluate the difference in the corrosion damage according to the installation environment of steel structural members, outdoor exposure test was carried out from attaching unpainted monitoring plate and atmospheric corrosion monitoring sensor for actual steel bridge with various structural detail.

To properly maintain steel structures, it is important to investigate the corrosivity of structural member. In this study, atmospheric exposure tests were carried out for 1 year using monitoring steel plates (MSP). In addition, atmospheric corrosion environment were also monitored by temperature and humidity sensor, corrosion monitoring (ACM) sensors, etc.

This reasearch was performed to evaluate CO2 emission of Modular bridge quantitatively. Preferentially, Modular bridge was separated steel girder bridges, concrete girder, concrete slab bridge and analyzed process in doing configuration W.B.S system. According to the Ministry of land guidelines, each process was divided into material, transportation, construction and calculated by division in detail the materials and fuel so it planned that quantitative assessment can be achieved.