fatigue characteristic of rc beams strengthen with cfrp strand sheet
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Fatigue Characteristic of RC Beams Strengthen with CFRP Strand sheet. B4 Junpei Kasai. Today’s Topic. ・ Background & Purpose ・ Experiment & Result ・ Future plan. Static behavior. Background & Purpose. clear. Fatigue behavior. unclear. To make fatigue behavior clear.

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Presentation Transcript
today s topic
Today’s Topic

・Background & Purpose

・Experiment & Result

・Future plan

background purpose

Static behavior

Background & Purpose

clear

Fatigue behavior

unclear

To make fatigue behavior clear

To analyze residual strength after 2milion fatigue load

experiment result
Experiment & Result

Maximum load 90kN

Minimum load10kN

・Specimen

experiment result1
Experiment & Result

Figure of Crack

experiment result2
Experiment & Result

Figure of Crack

experiment result3
Experiment & Result

・Failure model

1layer Bending failure

Maximum load 250kN

Debonding occur at end of sheet

2layer Bending failure

Maximum load 260kN

Debonding occur at end of sheet

experiment result4
Experiment & Result

Load-displacement at loading point of 1 layer

experiment result5
Experiment & Result

Load-displacement at loading point of 1 2ayer

experiment result6
Experiment & Result

Maximum load

Static After fatigue

1layer 278kN 250kN

2layers 315kN 260kN

Enough residual strength

experiment result7
Experiment & Result

Strain of sheet

experiment result8
Experiment & Result

Strain of sheet

The number of loads increase

Strain of sheet increase

Strain of sheet

1layer>2layer

experiment result9
Experiment & Result

Bond stress of sheet

experiment result10

Bond stress of sheet

1layer>2layers

Sheet debonding

Bond stress move

Experiment & Result
future plan

~ 2009Dec24

Statictest

2009 Dec 25 ~

Analysis & Thesis

Future plan

Thank you for your kind attention !!

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