Simplified calculation method for normal section flexural capacity of rusted reinforced concrete beam

A reinforced concrete beam, simplified calculation technology, applied in complex mathematical operations, design optimization/simulation, geometric CAD, etc., can solve problems such as lack of simplified calculation methods for flexural bearing capacity

Active Publication Date: 2021-04-09
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is currently no simplified calculation method for the flexural capacity of corroded reinforced concrete beams that clearly distinguishes different modes of flexural failure.

Method used

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  • Simplified calculation method for normal section flexural capacity of rusted reinforced concrete beam
  • Simplified calculation method for normal section flexural capacity of rusted reinforced concrete beam
  • Simplified calculation method for normal section flexural capacity of rusted reinforced concrete beam

Examples

Experimental program
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Effect test

Embodiment

[0093] A laboratory in Shanghai obtained six reinforced concrete beam specimens (numbers L11, L12, L13, L21, L22, and L23) with different degrees of corrosion by using the method of accelerated corrosion by electrification. Calculate the flexural capacity of the six corroded reinforced concrete beams.

[0094] (1) Measure and calculate the basic parameters of reinforced concrete beams before and after corrosion

[0095]1) According to the method described in GB / T 50784-2013 "Technical Standards for On-site Inspection of Concrete Structures", the front sections of the six reinforced concrete beams are all rectangular, and the section width b, section height h, and section effective height h of each beam are measured 0 , as shown in Table 1; the measured concrete compressive strength f c , Concrete tensile strength f t , as shown in Table 1; measured longitudinal reinforcement average corrosion rate η s , the number of steel bars n and the diameter d (according to which the i...

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Abstract

The invention discloses a simplified calculation method for the normal section flexural capacity of a rusted reinforced concrete beam. The simplified calculation method comprises the following steps: (1) measuring and calculating basic parameters of the rusted reinforced concrete beam before and after rusting; (2) judging a normal section bending damage mode; and (3) calculating the normal section flexural capacity of the rusted reinforced concrete beam under different failure modes. According to the simplified calculation method for the normal section flexural capacity of the rusted reinforced concrete beam, on the basis of judging a normal section flexural failure mode, the highest equation involved in solving is a unary quadratic equation, and the simplified calculation method has the advantages of being clear in concept and easy and convenient to calculate; technicians in the field can conveniently, rapidly and accurately calculate the normal section flexural capacity of the rusted reinforced concrete beam, and support is provided for safety evaluation of a service reinforced concrete structure.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and relates to a simplified calculation method for the anti-bending bearing capacity of the normal section of a corroded reinforced concrete beam. Background technique [0002] Under the long-term action of corrosive media in the environment, the steel bars in the concrete structure will corrode. Corrosion of steel bars leads to performance degradation of concrete structures, causing premature failure of concrete structures, which brings a huge burden to national economic and social development. It is estimated that in 2014, the cost of corrosion in my country accounted for about 3.34% of GDP in that year. Such a major economic loss was unexpected at the beginning of concrete structure construction. Therefore, grasping the performance evolution law of concrete structures has aroused extensive attention from academic and engineering circles at home and abroad. [0003] For this reason...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/20G06F17/18G06F119/14
CPCG06F30/13G06F30/20G06F17/18G06F2119/14
Inventor 姜超顾祥林丁豪
Owner TONGJI UNIV
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