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sdec.in Silver Sponsor

Joined: 26 Jan 2003 Posts: 473
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Posted: Mon Aug 16, 2004 9:25 am Post subject: 2004 |
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The comments of Mr Rudra nevatia are very fine and make lot of sense; however as we all know in real life we mostly encounter Rehab jobs where no analysis, no design and mind you no drawings are available to tell us what has gone into the building. I have recently been offered a project of remodeling and extension of a small basement+3storeyed building where one future floor provision is to be added and it is now proposed to have a structural cladding and a new façade has to be built (jewelry of the bulding--Dr S K Jain--are you listening!) but the only information that we have is that the building construction appears to be GOOD and perhaps not more than ten years old. It automatically becomes a non-starter since the Client hasn’t heard of the NDT techniques or Strengthening etc, is scared that it will be horribly expensive and as usual is in a hurry! In such a case, the structural engr has to tread v v carefully on a judicious path decided by his judgement experience and economics w/o sacrificing safety and I don’t think the Code is much useful either. Sangeeta Wij
-----Original Message----- From: rudra_nevatia@yahoo.com [mailto:rudra_nevatia@yahoo.com] Sent: Monday, August 16, 2004 10:09 AM To: sdec@bol.net.in Subject: [Econf] Re: [Econf] Re: [Econf] Daily Digest Sun Aug 15 23:02:25 2004
************************************************* SEFI e-Conference on draft code for "Seismic Evaluation & Strengthening of Existing Buildings", August 09 to 21, 2004 ************************************************* While drafting the code, we must keep in mind that most of the building stock in India is non-engineered. Many of the buildings, supposedly designed by Engineers may not pass rudimentary checks for seismic design.
Secondly, methods of construction vary across the country. Recently, I was pleasantly surprised to find that Census of India, not only counts the population but also records methods of construction and the condition of buildings district-wise. A look at the latest figures of Census 2001 shows that, given the diversity of building types, any attempt at extending the draft code to cover all of them would be a humongous task.
It is difficult to imagine that a comprehensive document with 'legal' status can be produced any time soon. May I therefore suggest that, in its first cycle, the draft code should cover the following in general terms, without getting into details of construction:
1. Performance levels 2. Methods of analysis (Linear/non-linear, static/dynamic) 3. Acceptance criteria
Based on these parameters, Research Institutes / Engineers can then work out methods of retrofitting for various building types.
Rudra Nevatia
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