Method for determining ultimate flexural capacity of basalt reinforcement waste steel fiber reinforced concrete beam
A steel fiber reinforced concrete and basalt technology, which is applied in the field of fiber reinforced concrete, can solve the problems of not applying FRP reinforced concrete beam calculation, and the calculation method of the flexural bearing capacity of basalt reinforced waste steel fiber reinforced concrete beams is not given, and achieves high reliability. Effect
Pending Publication Date: 2022-02-18
WUHAN UNIV OF TECH
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Problems solved by technology
[0004] At present, the domestic and foreign codes for the design of fiber-reinforced composite-reinforced concrete structures, including my country's "Fiber-reinforced composite material construction engineering application technical specification" GB50608-2020 and the United States ACI440. However, the current "Code for Design of Concrete Structures" (GB 50010-2010) is obviously not suitable for the calculation of the ultimate load of FRP reinforced concrete beams.
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[0062] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but these embodiments should not be construed as limiting the present invention.
[0063] In this embodiment, 6 groups of 12 basalt reinforcement waste steel fiber reinforced concrete beams are designed for bending test. Based on this test, the theoretically calculated value of the ultimate flexural capacity of the beam is obtained by using the method for determining the ultimate flexural capacity of the basalt reinforcement waste steel fiber reinforced concrete beam provided by the present invention. Through comparison and verification with the test results, it can be seen that the theoretical calculation value of the method provided by the present invention is in good agreement with the test results.
[0064] The following is the specific introduction of the embodiment based on the test:
[0065] The cement is P.O42.5 ordinary Portland cement...
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The invention discloses a method for determining the ultimate flexural capacity of a basalt reinforcement waste steel fiber reinforced concrete beam, wherein the method comprises the steps: S1, simulating a flexural test of the basalt reinforcement waste steel fiber reinforced concrete beam to obtain an ultimate load simulation value of the beam; S2, introducing a waste steel fiber related influence coefficient mu, and determining a flexural capacity calculation formula of the beam section under tension and compression damage; S3, calculating the equivalent tensile stress [sigma]rsf value of the concrete in a tension area under different volume mixing amounts of the waste steel fibers; S4, performing linear fitting on the equivalent tensile stress [sigma]rsf of the waste steel fiber reinforced concrete in the tension area and the related influence coefficient mu of the waste steel fibers, and determining a calculation formula of the section balance reinforcement ratio; and S5, calculating the ultimate flexural capacity of the basalt reinforcement waste steel fiber reinforced concrete beam. According to the method, the flexural capacity of the basalt reinforcement waste steel fiber reinforced concrete beam can be accurately calculated, design and scientific research work related to the ultimate bearing capacity of the basalt reinforcement waste steel fiber reinforced concrete beam can be assisted, and the method has important theoretical and engineering significance.
Description
technical field [0001] The invention relates to the technical field of fiber-reinforced concrete, in particular to a method for determining the ultimate flexural bearing capacity of waste steel fiber-reinforced concrete beams with basalt bars. [0002] technical background [0003] Basalt Fiber Reinforced Plastic (BFRP) bars have the advantages of light weight, good corrosion resistance, and high tensile strength. At present, the application and research in reinforced concrete structures are developing rapidly. Recycled Steel Fiber (RSF) is extracted and recovered from waste tires, and has the advantages of high tensile strength and low cost. Use waste steel fibers as reinforcing fibers in reinforced concrete to replace or partially replace traditional steel fibers and synthetic fibers, and study its feasibility to improve the problems of large deformation, wide cracks and brittle failure of FRP reinforced concrete beams under stress, It is very meaningful, and at the same t...
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Login to View More IPC IPC(8): G06F30/23G06F119/14
CPCG06F30/23G06F2119/14
Inventor 范小春汪阳张宇陈远程徐东升李冬明
Owner WUHAN UNIV OF TECH