Intelligent self-monitoring and self-repairing memory alloy composite beam

A memory alloy and self-monitoring technology, applied in bridges, bridge parts, bridge construction, etc., can solve problems such as composite beam fatigue damage, fatigue crack damage, crack defects, etc., and achieve the effect of self-monitoring and self-warning

Inactive Publication Date: 2016-11-23
ZHEJIANG UNIV OF TECH
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem with this method is that two types of fatigue damage often occur in traditional composite beams: the fatigue crack damage of the concrete beam slab itself and the fatigue fracture of the shear connector between concrete and steel
[0004] Aiming at the problems of fatigue crack damage or other types of crack defects that may occur in actual bridge engineering during use, this invention proposes a new type of composite beam that can self-monitor and self-repair internal crack defects

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
  • Intelligent self-monitoring and self-repairing memory alloy composite beam
  • Intelligent self-monitoring and self-repairing memory alloy composite beam
  • Intelligent self-monitoring and self-repairing memory alloy composite beam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] refer to figure 1 and figure 2 , intelligent self-monitoring and self-healing memory alloy composite beam, including upper concrete slab 1 and lower I-beam 2, also including memory alloy shear nails 3 as sensing elements and carbon fiber-reinforced concrete embedded in the upper concrete slab along the beam length direction The memory alloy composite 4 and the memory alloy shear nails 3 are used to connect the upper concrete slab 1 and the lower I-beam 2 .

[0023] Further, the carbon fiber-memory alloy composite 4 is a driving element, which is used to close the crack of the component under current excitation.

[0024] Further, the memory alloy adopts a single-pass memory effect alloy, and the single-pass memory effect alloy deforms at a lower temperature, and can effectively restore the shape before the deformation after heating.

[0025] Further, it also includes an alloy resistance measurement circuit 5 and an alloy excitation drive circuit 6, and the alloy resis...

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 an intelligent self-monitoring and self-repairing memory alloy composite beam, which includes an upper concrete slab and a lower I-shaped steel, as well as a memory alloy shear nail as a sensing element and a shear nail embedded in the upper concrete slab along the beam length direction. Carbon fiber‑memory alloy composite, memory alloy shear studs are used to connect the upper concrete slab and the lower I-beam. It also includes an alloy resistance measurement circuit for measuring fatigue cracks inside the upper concrete slab during structural use, and an alloy excitation drive circuit for reset deformation of the carbon fiber-memory alloy composite after external heating of the memory alloy. The present invention adopts the shear nail made of memory alloy material as the connector connecting the upper and lower parts of the composite beam, mainly utilizing the superelasticity characteristic of memory alloy itself; ), which can be used as a sensing element to realize effective self-monitoring.

Description

technical field [0001] The invention relates to an intelligent self-monitoring and self-repairing memory alloy composite beam, belonging to the field of bridge beams and slabs. Background technique [0002] The bridge beam and plate member is the main load-bearing member of the bridge superstructure, which directly bears the vehicle load transmitted by the upper vehicle. Its use environment is complex and it has long-term service. If serious damage and deformation occur, it will greatly affect the stability and safety of the bridge structure itself. , and sometimes lead to a larger disaster - the overall collapse of the bridge deck. [0003] In the project, steel-concrete composite beams generally use upper concrete and lower I-beams, and the two are connected by shear connectors. The main problem with this method is that two kinds of fatigue failures often occur in traditional composite beams: fatigue crack failure of the concrete beam plate itself and fatigue fracture of ...

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
IPC IPC(8): E01D19/00
CPCE01D19/00
Inventor 卢彭真卢彭龙
Owner ZHEJIANG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap