Research on Static Load Bending Test of Railway Prestressed Concrete Beams with Different Tensioning Techniques
As the controlling work in the production of railway prestressed concrete precast beams,the tensioning techniques of prestressed concrete construction become particularly important.Traditional manual tensioning has drawbacks such as low accuracy,poor synchronization,and complex operation,while intelligent tensioning has advantages of high precision,full automation,etc.The static load bending test is the main test standard for the effect of prestressing the beam body,and it is also the most direct and fundamental method for testing the quality of the beam body.In order to check the tensile quality under both manual tensioning and intelligent tensioning processes,this study intends to carry out static load bending test on two groups of test beams with different tensioning methods,and conducts finite element numerical analysis.The results show that all the evaluation indexes of static load bending test of the test beam after manual tensioning and intelligent tensioning are qualified.Compared with manual tensioning,the measured beam body deflection and steel tendon tensile force at each loading stage of the beam static load bending test using intelligent tensioning are closer to the theoretical calculation values,and the tensioning control accuracy and tensioning quality are higher than those of manual tensioning beam.
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