In this study, it is investigated the relationship between sitting discomfort and major design variables of lumber support, such as prominence, height and width through volunteer tests. Korean 50 th percentile males and American 50 th percentile males are recruited among 36 to 45 years old peoples who have driving experiences and have no back pain during the past 12 months. Subject ratings are asked by changing design variables randomly. Body pressure and lumber position changes are also measured as object measures. And correlation among subject ratings, object measures and three design variables are analyzed using statistical analysis. As a result, it is revealed that prominence is the most dominant factor that correlates to the discomfort strongly for both-Koreans and Americans and contribution of other two variables are very low.
Hydraulic Structure are inevitably set up and operated in the river that flow characteristics are complex. When designing the water surface elevation and velocity by using 1-D Hydraulic Model, it will not be able to reflect the characteristics of Lateral Eddy and Superelevation due to centrifugal force. This study compared with result of 1-D Hydraulic Model and Hydraulic Model Experiments, Through the model experiment of Sloping Drop Structure installed on Curved-Channel. Hydraulic Model was constructed to baekseok bridge and Shinchun Bridge about 210 m interval located in Uijeongbu, Gyeonggi-do. Result of Hydraulic Modeling observed data and 1-D Hydraulic Modeling date are compared to design flood 100 year and 20 year. Result of experiments are depth ovserved data 35~48% low then 1-D Hydraulic Modeling date and velocity ovserved data 135~167% large then 1-D Hydraulic Modeling date. Research reaults expect to basic information for Curved-Channel Characteristics on Sloping Drop Structure.
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