Evaluation method of fatigue additional deformation of steel-concrete composite beam applying stud connector

A stud connector and additional deformation technology, which is applied in the field of evaluation of additional fatigue deformation of steel-concrete composite beams, can solve the problems of unclear general applicability, large discreteness and randomness of composite beam fatigue deformation, and achieves physical significance. Clear, accurate effects

Inactive Publication Date: 2017-05-31
GUANGXI UNIV +1
View PDF3 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large discreteness and randomness of the fatigue test results, the general applicability of the above formula to the fatigue deformation of composit

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
  • Evaluation method of fatigue additional deformation of steel-concrete composite beam applying stud connector
  • Evaluation method of fatigue additional deformation of steel-concrete composite beam applying stud connector
  • Evaluation method of fatigue additional deformation of steel-concrete composite beam applying stud connector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] 1. Design ideas and formula derivation

[0038]First, determine the two main factors of the additional fatigue deformation of the composite beam—the degradation of the concrete elastic modulus and the slip increment of the stud connector, and then solve their effects on the additional fatigue deformation of the composite beam by decoupling the two. Finally, the total fatigue additional deformation of the composite beam is obtained.

[0039] a. Calculate the additional deformation Δf caused by the degradation of the concrete elastic modulus 1 .

[0040] In calculating Δf 1 making the following assumptions:

[0041] (1) Neglecting the influence of stud slippage and other factors, only considering the influence of concrete elastic modulus degradation on the additional deformation of composite beams;

[0042] (2) Fatigue life of concrete N c Calculate according to formula (1), where the value of the concrete stress ratio is based on the top edge of the mid-span compres...

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 evaluation method of fatigue additional deformation of a steel-concrete composite beam applying a stud connector; the method determines a stress state of the most unfavorable section in a combined beam according to a fatigue design load, and accordingly acquires a stress range of the concrete and the stud; respectively calculates the degeneration degree of concrete elasticity modulus and slippage gain of the stud connector, and calculates the fatigue additional deformation of the steel-concrete combined beam caused by the both. The method considers about the influence of the degeneration of concrete elasticity modulus and slippage gain of the stud anti-shearing connector on the fatigue additional deformation of the steel-concrete composite beam at the same time, exactly predicts the fatigue additional deformation of the steel-concrete composite beam applying the stud anti-shearing connector under the equal fatigue load function; thus the method is good for guaranteeing that the combined beam structure is under a good technology state; meanwhile, the method can effectively control the risk of disastrous fatigue damage of the steel-concrete composite beam applying the stud connector.

Description

technical field [0001] The invention belongs to the technical field of structure detection and safety performance evaluation, and in particular relates to an evaluation method for fatigue additional deformation of a steel-concrete composite beam using stud connectors. Background technique [0002] Steel-concrete composite beams are composed of steel beams, concrete slabs and shear connectors, among which studs are the most commonly used form of shear connectors. In the 1990s, it was first applied in the construction of Shanghai Nanpu Bridge in my country, and then it was applied in many bridge structures such as Shanghai Yangpu Bridge and Wuhu Yangtze River Bridge. Due to the effect of fatigue loads such as vehicles, fatigue damage is inevitable in composite beams. Fatigue damage leads to the degradation of the mechanical properties of the concrete material, the stiffness and bearing capacity of the stud shear connectors, and causes the additional fatigue deformation of the...

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): G01B21/32
CPCG01B21/32
Inventor 杨涛郝天之陈万庆陈齐风连金明
Owner GUANGXI UNIV
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