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Posted: Mon Aug 16, 2004 7:23 am Post subject: Draft code on "Seismic Evaluation & Strengthening o
Dear All I agree with the other SEFI members that a retrofitting Code was long required and this is a good move in the right direction. I congratulate Dr Rai and others for coming up with this document.
I have the following comments/queries: a) The proposed code appears to be primarily meant for RC structures and calls out masonry structures only in passing in Section 7.4.3. Given the imbalance of RC vs. masonry structures, it may make sense to eliminate masonry structures from this code completely and let that be called out in separate code already existing for the same. b) Clause 7.3 – Acceptability Criteria- It appears that both the sub-clauses a and b have to be satisfied ( it is not “or”) The b sub-clause required ensurance that critical elements failure will not lead to loss of stability or progressive collapse which is to be verified by push-over or similar analysis. This appears to be a bit over the top considering that in India practically nobody does this even for new buildings. This clause needs a review. c) Section 8.5 –This is rather skeletal and may need more fleshing out. The seismic strengthening options may also discuss fibre wrapping and other newer technologies, for examples. Details of how to treat beam-column joints are missing.
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