Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Macro-micro model equivalence method for analyzing use state of reinforced concrete in chloride ion environment

A reinforced concrete and state analysis technology, applied in the effective field, can solve problems such as changing the chloride ion transport channel, steel bar corrosion, concrete protective layer cracking, etc., and achieves the effect of efficient analysis means, simple operation process, and clear design ideas

Inactive Publication Date: 2021-10-08
NANJING VOCATIONAL UNIV OF IND TECH
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the marine environment, chloride ion corrosion of concrete will lead to corrosion of steel bars, and the volume expansion of steel bar corrosion will lead to cracking of the concrete protective layer, which will significantly change the transport channel of chloride ions in concrete, and intensify the corrosion damage process of steel bars
The coupling of the above processes makes the analysis of the service state of reinforced concrete structures relatively complicated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Macro-micro model equivalence method for analyzing use state of reinforced concrete in chloride ion environment
  • Macro-micro model equivalence method for analyzing use state of reinforced concrete in chloride ion environment
  • Macro-micro model equivalence method for analyzing use state of reinforced concrete in chloride ion environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0028] S1. Realize the equivalence of concrete mesoscopic and macroscopic models in terms of mechanical properties. According to the material parameters of concrete mesoscopic model (see Table 1), the aging process of mesoscopic concrete uniaxial tension is analyzed, and the stress-strain curve of concrete is obtained ( figure 1 ), so as to obtain the equivalent material parameters of the concrete macro model at the same size, the tensile strength of the corresponding concrete macro model is about 0.95MPa, and the elastic modulus is about 39.5GPa.

[0029] Table 1 Mechanical parameters of each component of concrete

[0030] Material Elastic modulus (MPa) Poisson's ratio Tensile strength (MPa) cement mortar 30×10 3

0.2 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a macro-micro model equivalence method for analyzing the use state of reinforced concrete in a chloride ion environment, and relates to the technical field of building material analysis, and the method comprises the following steps: S1, establishing equivalence of mechanical properties of micro-concrete and macro-concrete models; S2, establishing an equivalent diffusion coefficient of a single aggregate and ITZ; S3, according to the quantity ratio of the aggregate with each particle size, obtaining equivalent diffusion coefficient Deq of aggregate and ITZ; and S4, enabling the mortar, the aggregate and ITZ mesoscopic concrete to be equivalent to a concrete macroscopic diffusion coefficient D. According to the method disclosed by the invention, aiming at a complex maritime work environment, the calculation dimension of an analysis main body can be effectively reduced and the calculation efficiency is improved while the analysis requirement is met by the equivalent method, and the basic method in the durability research of the reinforced concrete structure is further enriched and developed.

Description

technical field [0001] The invention belongs to the technical field of building material analysis, and in particular relates to a macro-micro model equivalent method for analyzing the use state of reinforced concrete in a chloride ion environment. Background technique [0002] With the rapid development of my country's economy, some important cross-sea bridges, subsea tunnels and other infrastructure supported by top technologies have been put into construction or use. Concrete, as a material widely used in infrastructure construction, has become increasingly prominent in its construction and use in terms of safety and durability, which puts forward higher requirements for design. Therefore, the proposal and application of the basic methods in the durability research of reinforced concrete structures have received great attention. [0003] Concrete is a composite material consisting of coarse aggregate, mortar, and a bonded interface between the two. In numerical simulatio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F30/13G06F119/14
CPCG06F30/20G06F30/13G06F2119/14
Inventor 张芹
Owner NANJING VOCATIONAL UNIV OF IND TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com