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Title |
Punching Shear Strength of Prestressed Precast Concrete Deck
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Keywords |
프리스트레스 프리캐스트 콘크리트 바닥판; 펀칭전단강도; 파괴모드; prestressed precast concrete deck; punching shear strength; failure mode |
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Abstract |
Recently, the failure case of the bridge deck slabs have been increasing in Korea and it was observed that the failure modes of most deck slabs collapsed were not caused by flexural moment but by local punching shear. The main reason of the failures was the punching shear failure of deck slabs under heavy truck traffics. This paper presents test results obtained from punching shear tests performed on prestressed precast deck specimens. Cracking patterns, failure modes, deflections, and stresses are included as well as discussion of the punching shear strength observed during punching shear tests. Static lest specimens had punching shear failures at loads much higher than predicted by the current codes. Tests results indicate that current code provisions appear to be conservative.
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