STUDY ON LIMIT STATES AND RATIONALIZATION OF DESIGN BASED ON HYDRAULIC PRESSURE TEST IN SMALL FRP HYDRAULIC GATES

Abstract

 FRP hydraulic gates are designed and verified based on allowable stress and deflection limitation in accordance with design standards, however, the limit states of safety and serviceability of the actual structures have not been sufficiently discussed. In this study, for the purpose of understanding the structural characteristics of small FRP hydraulic gates and developing a rational design method, two types of small FRP hydraulic gates and a small steel hydraulic gates based on the current design were experimentally tested for water pressure up to failure to understand the limit state, and a rational cross-sectional design for the design water pressure was studied by FEM analysis. The results showed that the designed FRP hydraulic gates could be rationalized because it is sufficiently safe and has sufficient margin, although the deflection limitation is dominant in the design, and that the minimum member height that satisfies the deflection limitation can be drastically reduced.