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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Fatigue Characteristic of RC Beams Strengthen with CFRP Strand sheet

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Fatigue characteristic of rc beams strengthen with cfrp strand sheet

Fatigue Characteristic of RC Beams Strengthen with CFRP Strand sheet

B4 Junpei Kasai


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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