Fatigue crack reinforcing structure and method for arc-shaped notch of diaphragm plate of steel bridge deck

A steel bridge deck, fatigue crack technology, used in bridge reinforcement, bridges, bridge parts, etc., can solve the problems of secondary cracking at welds or bolt openings, the repair effect depends on construction quality, and the stability is difficult to guarantee. Avoid anchoring devices and heavy tensioning equipment, reduce construction difficulty and facilitate transportation

Pending Publication Date: 2021-08-20
TONGJI UNIV ARCHITECTURAL DESIGN INST GRP CO LTD +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the repair methods for fatigue cracks at the arc-shaped incision of the bridge diaphragm mainly include the crack hole method, the steel plate reinforcement method, and the crack welding method. Although the above methods have repaired or strengthened the damaged part of the crack, grinding is re

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
  • Fatigue crack reinforcing structure and method for arc-shaped notch of diaphragm plate of steel bridge deck
  • Fatigue crack reinforcing structure and method for arc-shaped notch of diaphragm plate of steel bridge deck
  • Fatigue crack reinforcing structure and method for arc-shaped notch of diaphragm plate of steel bridge deck

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0043] Such as figure 1 , figure 2 , image 3 As shown, the steel bridge deck includes a steel bridge deck top plate 1, a longitudinal U-rib 2 arranged at the bottom of the steel bridge deck top plate 1, and a plurality of diaphragms 3 arranged at intervals at the bottom of the steel bridge deck top plate 1, and the inner side of the transverse diaphragm 3 There are arc-shaped cutouts 4 matching the longitudinal U-ribs 2 , and fatigue cracks 5 are located on the diaphragm 3 .

[0044] A reinforcement structure for fatigue cracks at the arc-shaped cutout of the diaphragm of a steel bridge deck, including a crack stop hole 6 provided on the diaphragm 3, a shape memory alloy sheet 7 arranged on the side of the diaphragm 3, and the inner end of the fatigue crack 5 It is connected with the arc-shaped cutout 4 , and the outer end is connected with the crack arrest hole 6 , and the shape memory alloy sheet 7 covers the fatigue crack 5 and the crack arrest hole 6 at the same time. ...

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

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to a fatigue crack reinforcing structure and method for an arc-shaped notch of a diaphragm plate of a steel bridge deck, the reinforcing structure comprises a crack arrest hole formed in the diaphragm plate and a shape memory alloy sheet arranged on the side face of the diaphragm plate, the inner end of the fatigue crack is connected with the arc-shaped notch, the outer end of the fatigue crack is connected with the crack arrest hole, and the shape memory alloy sheet covers the fatigue crack and the crack arrest hole at the same time. Compared with the prior art, the reinforcing structure has the advantages that through the cold repair mode of combined action of drilling crack arrest and shape memory alloy sheet pasting, welding residual stress is not introduced, the fatigue life of the arc-shaped notch of the diaphragm plate is remarkably prolonged, and the reinforcing structure has the advantages of being simple in reinforcing mode, relatively low in manufacturing cost, low in construction difficulty, convenient and rapid to install and the like.

Description

technical field [0001] The invention belongs to the technical field of orthotropic steel bridge decks, and relates to a structure and a method for strengthening fatigue cracks at arc-shaped cutouts of transverse diaphragms of steel bridge decks. Background technique [0002] Orthotropic steel bridge decks are often used as the deck structure system of steel bridges because of their outstanding advantages such as light weight, large bearing capacity, wide application range, and short construction period. Fatigue failures of the orthotropic slabs of many early-construction long-span steel bridges have occurred due to the increased traffic generated by the increasingly developed economy. After these fatigue damages occur, not only will it induce various diseases such as bridge deck pavement reflection cracks and pits, but it will also directly affect the safety of the structure when the cracks develop to a certain extent. Therefore, it is of great practical significance to rep...

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): E01D22/00E01D19/12E01D101/30
CPCE01D19/125E01D22/00E01D2101/30
Inventor 姜旭邓青儿强旭红吴炜吕志林孙修其李欣然
Owner TONGJI UNIV ARCHITECTURAL DESIGN INST GRP CO LTD
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