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Joined: 26 Jan 2003
|Posted: Wed Jan 21, 2004 1:31 am Post subject: more on Bam & quality of Concrete
|1. New Constructions.
Ideally it looks as though if we follow the code in new constructions, the
problem will vanish.
However good we may be in theoretical analysis and design, in practice
unless we minimise eccentricity and torsion, there will be damages in new
constuctions. There is no substitute for regularly planned buildings
[irregular buildings have a higher risk even if properly analysed and
Even more important is proper detailing and concreting in the field
I did not realise it when I was in the rarified academic atmosphere and
for granted that field work will be nearly simulating lab conditions. Now, I
a hobby to see construction sites as a common man without disclosing my
and observe the abuse. My samples indicate the problem is serious.
In this cycle of Builder-Architect-Analysit/Designer-Field Engineer /Mistry
eventual owner of the flat, the most important thing is to educate them the
- there is no substitute for a well confined reinforced concrete without
2. Old Constructions:
We cannot wish away the problems. Even the code is silent after it upgrades
about those structures constructed earlier strictly following the codes in
existance at the
time of their construction.
3. Do not spread the resources thin !!
It is good to identify those cities in Zone V [Northeast India and Himachal
assuming 1897 & 1905 will revisit] and concentrate on new as well as old
Pray freaks like Khillari, etc ., do not resurface elsewhere and do not
in zone III and below. In my opinion, even Delhi has a lower priority as
to Gauhati and Kangra !
aggressively campaign for regularly shaped buildings and good construction
in the field to ensure integral joints.
----- Original Message -----
Sent: Sunday, January 18, 2004 8:37 PM
Subject: Different Grades of Concrete - - - From Constrcution Point
Of Vie w
|Dear All Structural Engineers & Mr. Vijaya Vittal |
From "Designers Point of View" one may not mind in using lower grade
concrete (as that of the beam) in beam-column junction. But if we talk
|actual site condition, we all know that the beam-column junction is |
|reinforced portion. Hence always many contractors do not pour & compact |
concrete, nicely, in this zone.
Also in olden days the joints were neglected, but now a days the
Design-Standards give more importance to the design of joints.
Hence the obvious decision that has to be taken by the Designer, to use
HIGHER GRADE of concrete ONLY, in beam-column junction.
Note : Even if we go for very sophisticated analysis of a structure, using
modern computer software, all these efforts will be wasteful, unless, the
contractor is made to implement them on site.
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