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권혁빈(Kwon Hyeok-bin),유원희(You Won-hee),하강희(Ha Kang-hee),정명수(Jeong Myeong-soo) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
Anemometers to examine the characteristics of the natural wind in the vicinity of the railway track has been installed in two spots, one at the Cheon-Asan station of the Seoul-Busan high-speed line, and the other at the Daechon station of the Changhang conventional railway line in 2006 to examine the characteristics of the natural wind around the railway track to estimate the actual wind speed acting on the train and to develop the wind gust model consisting with the Korean climate condition. The measured data shows that the instant wind velocity frequently exceeds the velocity of train speed restriction, 20㎧, and the actual wind velocities measured in the vicinity of the track are larger than the that measured by the Korean Meteorological Administration(KMA) because the anemometers are installed on the highly-elevated bridges.
고해상(1250KHZ)소나를 이용한 영종대교 하부구조의 수중점검에 관한 연구
정지승 ( Chung Jee Seung ),박철 ( Park Chul ),배인환 ( Bae In Hwan ),하강희 ( Ha Kang Hee ) 한국구조물진단유지관리공학회 2008 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.12 No.1
The objective of underwater inspection is to detect defects in underwater structures as early as possible and to provide basic data for the proper maintenance and support of these structures so as to lengthen their life and ensure their safety. It is especially necessary to select the proper inspection method and equipment for the underwater environment, since underwater inspection is carried out under special environmental conditions that differ from those on the ground, including a pressurized condition, difficulty of access, defects in equipment/device waterproofing systems, and the safety of the inspection staff. In this Study underwater inspection using sonar is proposed to efficiently inspect Youngjong Grand Bidge Substructures. It may found that the proposed inspection method should be useful for Inspection of offshore substructures.