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[SEAOC] Concrete Cracks[Subject Prev][Subject Next][Thread Prev][Thread Next]
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- Subject: [SEAOC] Concrete Cracks
- From: croser(--nospam--at)s6.hninc.com
- Date: Thu, 19 Sep 1996 7:56:05 -0800
Ron's latest post prompted me to ask this question. I'm looking for a method to calculate the deflection of a cracked concrete wall based on the width and length of the cracks. To date, the best information I have is to reduce the shear stiffness to a percentage of the uncracked wall (between 30 and 50% of the original stiffness). Has anyone else done this calculation or are there any references on this subject? Where this is going ultimately is that I'm required to do a loss of strength calculation on an earthquake damaged concrete shear wall building and the criteria I'm required to follow is to first analyze the building for current code forces and determine the deflection assuming uncracked properties. Second, analyze the building with cracked walls and push it to the same deflection as the uncracked building and compare the base shear required to obtain this deflection. The difference in these two base shears is to be my loss of strength. I'm aware that this approach will draw many comments and different opinions and I'm curious to hear them all, but please remember that I'm most interested in help in how to calculate deflections of a cracked wall. Thanks in advance. Jeff Crosier ...
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