Research progress of FRP reinforced seawater sand concrete structure
In recent years,it is a hot research topic to prepare FRP reinforced seawater sand concrete structure by combining lightweight,high-strength and corrosion resistant fiber reinforced polymer(FRP)with seawater sand.The use of FRP materials instead of steel can make sea sand directly used in structures without desalination.The use of seawater and sea sand to replace freshwater river sand is an important way to solve the shortage of freshwater river sand resources and the ecological problems of river bed caused by river sand mining.It is also of great significance to the marine strength strategy of China by using local materials for marine engineering construction and reducing the transportation cost of freshwater river sand.Based on the analysis of the existing research status of FRP reinforced seawater sea sand concrete structures at home and abroad,it summarizes and introduces the characteristics of seawater sea sand concrete and FRP reinforced polymer and the new type of FRP reinforced seawater sea sand concrete structures.It summarizes the influence of factors such as section area,reinforcement ratio and stirrup spacing of FRP bars on the mechanical properties of FRP reinforced marine sand concrete structures.It analyzes the problems existing in the current marine concrete structures,and puts forward suggestions and prospects for the research of marine concrete structures,which provides reference for the future research of marine structures.