07-12-2010, 11:42 AM
1.How did you assume that the crack penetrates up to the link level? Cracks can't occur between links?
2. Have you ever calculated a moment-curvature relation (by hand or with a software) for a RC element? If you have I suggest to look at the stiffness in behavior stage II (cracked section) and compare it to the uncracked section stiffness? You will probably obtain a result of 0.3-0.5. That is way it is taken 0.5 (it is an average value) for beams.
3. The writer you are talking about is Thomas Paulay. I'm afraid I can never agree with your opinion on this issue. The writer's personal opinions are sustained by TESTS. Your opinion is sustained by a calculation, which in my opinion is not correct!
4. I have quoted 2 books, as requested. Unless I will be given quotes from different books I (humbly) refuse to answer in this thread.
Regards
2. Have you ever calculated a moment-curvature relation (by hand or with a software) for a RC element? If you have I suggest to look at the stiffness in behavior stage II (cracked section) and compare it to the uncracked section stiffness? You will probably obtain a result of 0.3-0.5. That is way it is taken 0.5 (it is an average value) for beams.
3. The writer you are talking about is Thomas Paulay. I'm afraid I can never agree with your opinion on this issue. The writer's personal opinions are sustained by TESTS. Your opinion is sustained by a calculation, which in my opinion is not correct!
4. I have quoted 2 books, as requested. Unless I will be given quotes from different books I (humbly) refuse to answer in this thread.
Regards