Experimental Study And Theoreticl Analysis On Flexural Behavior Of Sea Water And Sea Sand Concrete Beam Reinforced With FRP Bars

Steel-reinforced concrete is an excellent building material widely used in a variety of civil and industrial buildings, but in some kind of environment, such as: corrosive seawater environment, their poor durability will a big problem. How to improve this seriously flaw is always a researching hotpot all over the world. FRP bars is a new type of conform material bars, its corrosion resistance is a particularly prominent feature. Now FRP bars working together with seawater and sea sand concrete is an emerging research topic.Based on the nature complementary of FRP bars and seawater and sea sands concrete, as well as the future development by using these new materials, we researched the mechanical properties of the seawater and sea sands concrete and flexural behavior of the FRP reinforced seawater and sea sands concrete.In order to study the impact of sea sand and seawater on the concrete strength, we experiment two groups of concrete and compared the results. According to the data, a reliable mix proportion is given.In order to find out the flexural behavior, we produced 10 FRP reinforced seawater and sea sand concrete beams with different ratio. All the beams have been tested in static load experiment. The load-deflection curve, the capacity and the development of crack are all tested in the tests, and we also proved the plane section assumption.Based on the experimental data, a reliable method to calculate the capacity of FRP reinforced seawater and sea sand concrete beam is put forward. we have compared all kinds of load-deflection curve calculating formulas in domestic and abroad, and validated results show that these formulas can be used in FRP reinforced seawaters sand concrete beams.