for_prof_arc at hotmai...
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 Posted: Mon Sep 20, 2004 12:03 pmPost subject: Some Suggestions |
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----- Original Message -----
From: "Prof. A R Chandrasekaran"
To:
Cc: "sefi"
Sent: Monday, September 20, 2004 5:04 PM
Subject: Re: [Econf] Some Suggestions
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1. Modelling of reinforced concrete buildings may be covered in greater
detail so that everyone follows the same approximate method and arrive at
results in a narrow band.
What is the "E" to be taken; Properties of section in case of Columns,
Beams; How to model Slabs; Staircases; Lift Walls, Masonry Partition
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Walls.
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The effective forces on the strucural system would dramatically change
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after
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the partition walls have cracked. Do we check the design before as well as
after cracking of walls? Once the walls crack, should we still anchor the
forces to the empirical value of period.
If there is a structure without masonry partitions, should we insist on
anchoring to empirical value of period or permit the analysis based on the
flexible structure.
2. The damaging earthquake may occur once [or very few times or not at
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all]
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in the life time of the structure. Why insist on so many combinations
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while
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considering earthquake loading.
WHY NOT JUST ONE SET OF COMBINATION ONLY?
3. A revision should comment on seismic zoning - the present one is
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faulty -
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it has higher risk in Peninsular India and the severe zones are untouched
since 1970 !!
4. the revision should comment on "R" Are the values achievable even under
controlled Lab conditions ?
A R Chandrasekaran
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