Experimental Study on Fatigue Behavior of Prestressed Concrete Beams with Manufactured Sand

Abstract:

This paper presents the test results of 2 prestressed concrete beams with manufactured sand under cyclic loading, the concrete is made of manufactured sand to replace natural sand with different replacement rates of 50% and 100%. The stress of re-bars and prestressed strands and the strain of manufactured sand concrete are discussed, the rigidity and cracking of the prestressed beams under cyclic loading are analyzed, and the flexural behavior of the beams after 2.5 million times cyclic loading are also discussed and analyzed. The results show that the fatigue behavior of the prestressed concrete beams with manufactured sand to replace the natural sand under cyclic loading is satisfied, the flexural bearing capacity of the prestressed beams after 2.5 million times cyclic loading is still sufficient. The results also show that the crack width and the mid-span deflection of the prestressed beams are in the allowable range at the serviceability limit state. This may be regarded as a reference for the applications of manufactured sand in the prestressed concrete structure .

• Periodical: Key Engineering Materials (Volume 517)
• Pages: 595-600
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.517.595
• Online since: June 2012
• Authors: Qian Qian Li, Li Xin Liu, Sheng Dong He
• Keywords: Fatigue Behavior, Mechanism Sand, Prestressed Concrete Beams, Replacement Rate

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