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Fatigue Characteristic of RC Beams Strengthen with CFRP Strand sheetPowerPoint Presentation

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

Static behavior Strand sheet

Background & Purposeclear

Fatigue behavior

unclear

To make fatigue behavior clear

To analyze residual strength after 2milion fatigue load

Experiment & Result Strand sheet

Figure of Crack

Experiment & Result Strand sheet

Figure of Crack

Experiment & Result Strand sheet

・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 & Result Strand sheet

Load-displacement at loading point of 1 layer

Experiment & Result Strand sheet

Load-displacement at loading point of 1 2ayer

Experiment & Result Strand sheet

Maximum load

Static After fatigue

1layer 278kN 250kN

2layers 315kN 260kN

Enough residual strength

Experiment & Result Strand sheet

Strain of sheet

Experiment & Result Strand sheet

Strain of sheet

The number of loads increase

Strain of sheet increase

Strain of sheet

1layer＞2layer

Experiment & Result Strand sheet

Bond stress of sheet

Bond stress of sheet Strand sheet

1layer＞2layers

Sheet debonding

Bond stress move

Experiment & Result～ Strand sheet2009Dec24

Statictest

2009 Dec 25 ～

Analysis & Thesis

Future planThank you for your kind attention !!

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