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500MPa Fine Grained reinforced ( HRBF500 ) as a new generation of steel materials with low cost, high strength , long life and many other advantages , intended to be applied to roads, railways , bridges and high-speed railway , the need to withstand fatigue loads . Currently, the fatigue properties of prestressed concrete members configure HRBF500 reinforced still blank . Therefore, this paper, the National High Technology Research and Development Program (863 Program) funded projects ( 2008AA030704 ) design 4 configuration for high-speed rail HRBF500 reinforced prestressed concrete T-beam , its static load test and constant amplitude fatigue loading test to study its performance under fatigue loading force , the main contents are as follows : (1) under the railway bridge and culvert reinforced concrete and pre-stressed concrete structure design specification , design , produced four configuration HRBF500 reinforced prestressed concrete T-shaped beams, and the loss of prestress real-time monitoring and theoretical calculations , and a comparative analysis . (2) First of all, the four configure HRBF500 reinforced prestressed concrete T-beam under static load test , analyze, compare the different degree of prestressed reinforcement ratio test beam experimental phenomena in the static load test , cracks change , deflection, prestressing strand strain , tensile reinforcement strain, compression reinforcement strain and concrete strain changes and laws . ( 3) Then , four configure HRBF500 reinforced prestressed concrete T-beam fatigue test , cracks , deflection, prestressing strand stress , tensile reinforcement stress , pressure steel stress and concrete strain variation and influencing factors, and a comprehensive analysis of the fatigue frequency N, prestressing degree , reinforcement ratio , the initial fatigue loading and stress ratio and stress amplitude factors such as fatigue properties of the test beams . Configuration based on four high-speed rail HRBF500 reinforced prestressed concrete T-shaped beam fatigue test under fatigue load test beam crack width , deflection and tension reinforcement fatigue stress further theoretical analysis , in order to withstand fatigue loads the HRBF500 reinforced prestressed concrete structures designed to provide a theoretical basis .
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