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econdary Cracks / Splitting Cracks in Reinforced Concrete Be
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jrm2002
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Joined: 26 Jan 2003
Posts: 67
PostPosted: Mon Dec 20, 2004 12:01 pmPost subject: econdary Cracks / Splitting Cracks in Reinforced Concrete Be Reply with quote
�I was reading the �Mode of Cracks� for a simple reinforced concrete beam (simply supported with udl) for a seminar I am to give next week.
Well we have , �flexural cracks� (vertical) , �web shear / diagonal tension
Cracks�, �Flexural shear Cracks�.The explanation/ reasoning for all these is
fine.Then I came across �Splitting Cracks� otherwise called �Secondary Cracks� . Tht text says �sometimes , the inclined crack propogates along the tension reinforcement towards the support . Such cracks are called �Splitting Cracks� or �Secondary Cracks�. These introduce dowel forces in the tension bars resisting the displacement between two segments of the beam. This is �Dowel Acion�.
My question is that :
WHY THE INCLINED CRACK SHOULD PROPOGATE TOWARDS THE SUPPORT ?? WHAT IS THE REASON FOR THIS PROPOGATION TOWARDS THE SUPPORT?? Plz help

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