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Method for predicting shear performance of square-section reinforced concrete beam

A technology of reinforced concrete beam and prediction method, which is applied in prediction, instrument, electrical digital data processing and other directions, can solve problems such as calculation and evaluation of mechanical performance of reinforced concrete beams with square cross-section, etc., and achieve the effect of high calculation accuracy

Active Publication Date: 2021-11-12
SOUTHEAST UNIV
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Problems solved by technology

Since the material properties and construction methods of square-section reinforced concrete beams are obviously different from those of modern reinforced concrete structures, many existing calculation methods are not suitable for the calculation and evaluation of the mechanical performance of square-section reinforced concrete beams. Therefore, it is very necessary to establish a scientific and accurate calculation model for evaluation its carrying capacity

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  • Method for predicting shear performance of square-section reinforced concrete beam
  • Method for predicting shear performance of square-section reinforced concrete beam
  • Method for predicting shear performance of square-section reinforced concrete beam

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[0133] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0134] This embodiment discloses a method for predicting the shear performance of a square-section reinforced concrete beam, including the following steps:

[0135] S1: Beam shear balance formula:

[0136]

[0137] Where: V sum is the total pressure; T is the tension; z r is the distance between the compressive and tensile forces.

[0138] Carry out stress analysis on the isolation body I (concrete on the upper surface of the critical crack), and establish a ...

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Abstract

The invention discloses a method for predicting the shear performance of a square-section reinforced concrete beam. The calculation method comprises the steps of S1, determining a beam shear balance expression through an improved internal force arch truss model; S2, solving a fracture angle; S3, solving an arch inclination angle; S4, solving the tension of a stirrup; S5, solving the pressure of a concrete pressing rod; S6, solving the shearing force of an internal force arch; S7, solving the tension of a lower tensile steel bar; S8, solving the upper concrete pressure and the micro-crack cohesive force; and S9, performing comprehensive solution through each subitem to obtain the shear performance of the square-section reinforced concrete beam. According to the invention, bonding slippage between the concrete and the reinforcing steel bars and constitutive models of the reinforcing steel bars and the concrete are considered, meanwhile, the influences of the size effect and critical cracks are considered in a calculation formula, and then the calculation precision is high; and the shear performance of the square-section reinforced concrete beam can be evaluated, and a theoretical basis is provided for scientifically evaluating the stress performance of a square-section reinforced concrete structural member.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a method for predicting the shear performance of reinforced concrete beams with square sections. Background technique [0002] Historic buildings are China's precious material cultural heritage, among which square-section reinforced concrete buildings occupy a very important position. Due to changes in external factors, most of these buildings have suffered damage and disease to varying degrees. Since the material properties and construction methods of square-section reinforced concrete beams are obviously different from those of modern reinforced concrete structures, many existing calculation methods are not suitable for the calculation and evaluation of the mechanical performance of square-section reinforced concrete beams. Therefore, it is very necessary to establish a scientific and accurate calculation model for evaluation its carrying capacity. [0003] The invention adop...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/20G06Q10/04G06Q50/08G06F119/14
CPCG06F30/13G06F30/20G06Q10/04G06Q50/08G06F2119/14
Inventor 淳庆张承文李盼林怡婕
Owner SOUTHEAST UNIV
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