Fatigue Characteristic of RC Beams Strengthen with CFRP Strand sheet

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Presentation transcript:

Fatigue Characteristic of RC Beams Strengthen with CFRP Strand sheet B4 Junpei Kasai

Today’s Topic ・Background & Purpose ・Experiment & Result ・Future plan

Background & Purpose Static behavior clear Fatigue behavior unclear To make fatigue behavior clear To analyze residual strength after 2milion fatigue load

Experiment & Result Maximum load 90kN Minimum load　10kN ・Specimen

Experiment & Result Figure of Crack

Experiment & Result Figure of Crack

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 & Result Load-displacement at loading point of 1 layer

Experiment & Result Load-displacement at loading point of 1 2ayer

Experiment & Result Maximum load Static After fatigue 1layer 278kN 250kN 2layers 315kN 260kN Enough residual strength

Experiment & Result Strain of sheet

Experiment & Result Strain of sheet 1layer＞2layer The number of loads increase Strain of sheet increase Strain of sheet 1layer＞2layer

Experiment & Result Bond stress of sheet

Experiment & Result 1layer＞2layers Bond stress of sheet Sheet debonding Bond stress move

Future plan Static test Thank you for your kind attention !! ～　2009　Dec　24 2009 Dec 25 ～ Analysis & Thesis Thank you for your kind attention !!