포항 도로교 건설에 따른 주경간장 결정에 관한 연구

Abstract

The construction of domestic Sea-crossing bridge such water bridge and highway bridge as s is becoming more active, and there is a close relationship with the safety traffic of vessels in the vicinity of the passage or waterway where the passage of the vessel is frequent. Especially, the main span length of bridge is necessary to consider due to determine the ship’s navigable water area and a risk of collision with the main bridge. Studies on the determination of the Main Span Length of maritime bridge across large harbors have been actively, but those of water bridge and highway bridge are insufficient. Therefore, safety was examined based on the largest vessel which is expected to pass a harbors when constructing water bridges and highway bridges. It is not appropriated to apply such uniform criteria which do not reflect traffic characteristics of designated port, this study presents a new standard for those bridges. First, a traffic survey was conducted for Pohang Port, which is scheduled to be constructed for highway bridge. Based on the results of the traffic survey, the characteristics of traffic of the ship in the area were derived. In the subject area, the ship’s traffic showed normal distribution characteristics, and the probability of collision and the probability of passing were calculated using the cumulative probability distribution function of the normal distribution. Based on the results of the calculations, we determined the proper main span length and comparison standard of domestic and international. As a result of comparison, it has been shown that it meets some criteria and it will be a decision – making method for the main span length considering the operational characteristics of the ship in the future. It is necessary to consider the operation patterns of various harbors in the future.