Analysis Of Mechanical Properties Of Reinforced Beams Under Cyclic Loading

The application of implanted reinforcement technology has great development potential.The theory of implanted reinforcement technology will be further strengthened with the widespread application and in-depth application research of reinforcement technology.Gradually improve the design,construction,and acceptance of tendons,and the application of tendons will also be standardized and theoretical.In this paper,a total of 8 test bars of reinforced concrete beams are designed and manufactured.Cyclic load tests are performed on 6 bars of concrete-entrained concrete beams.Static load tests of 2 bars of concrete-entrained concrete beams are performed.The reinforcement depth is compared,and the cyclic load test is compared with the static load test.The test results show that:(1)in the static load test,the brittle failure of the planted beam with a planted depth of 20 days occurred,and the planted beam with a planted depth of 25 days Ductile failure,which indicates that increasing the depth of tendon can effectively improve the overall mechanical performance of the tendon.When the depth of the planted bar was 20 d,the cyclic load would change the failure characteristics of the test beam from brittle to ductile,indicating that the cyclic load would improve and improve the overall performance of the planted bar.(2)The smaller the loading frequency is,the smaller the loading frequency is at 25 d.The larger the loading frequency is,the larger the loading frequency is at 20 d.When the loading frequency is 5HZ and 6HZ,the greater the depth of the planted tendon,the more obvious the effect of the bond slip curve;when the loading frequency is 7HZ,the smaller the depth of the tendon,the more obvious the effect of the bond slip curve.(3)During the cyclic load test,the concrete strain under the same implantation depth and different loading frequency will reduce the concrete strain by increasing the loading frequency.The concrete strain at different depths of implanted steel bars and the same loading frequency will reduce the strain of concrete by increasing the depth of steel bars.In this paper,the ANSYS software is used to further analyze the model of the planted beam.The model is built using the separated finite element method.The finite element simulation was used to analyze the mid-span load-deflection curve of the planted beam and the strain law of the planted end of the planted beam at the loading frequencies of 4HZ,5HZ,6HZ,7HZ,and 8HZ and the implantation depths of 15 d,20d,25 d,and 30 d.According to the finite element simulation:(1)When the loading frequency is between 4HZ-8HZ,as the loading frequency increases,the deflection in the span of the planted beam is smaller;(2)When the loading frequency is between4HZ-8HZ As the loading frequency increases,the strain at the end of the tendon of the tendon is greater;(3)This paper establishes the constitutive relation of bond slip under cyclic load,analyzes the characteristics of the linear rise section,quasi-slip section,and linear drop section of the bond slip curve.Knot slip model.