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Daily Digest Thu Oct 28 23:00:02 2004

 
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adutt
Progressive Member
Progressive Member


Joined: 26 Jan 2003
Posts: 43

PostPosted: Fri Oct 29, 2004 5:37 am    Post subject: Daily Digest Thu Oct 28 23:00:02 2004 Reply with quote

Dear Latha,
The IS:1893-2002  gives the spectral acceleration
coefficient Sa/g where the curve signifies maximum accelerations of
single degree freedom system with different stiffness & hence different
periods with 5% damping.You can read out the different time periods
versus Sa/g values where Sa is the spectral acceleration & g is
acceleration due to gravity i.e 9.8 m/s2.If you need the ground
acceleration (for a time history analysis)which I think you do not
require ,you will have to know the ground acceleration datas from which
these curves were further developed.

With regards

Amit Dutt
Structural Engineer

-----Original Message-----
Message From  general@sefindia.org [mailto:general@sefindia.org]
Sent: Friday, October 29, 2004 4:30 AM
To: Amit Dutt
Subject: Daily Digest Thu Oct 28 23:00:02 2004

----------------------------------------------------------
Message From  acpl_sefi@rediffmail.com
Subject: rehablitation of corroded structures
Date: 27/10/04
Time: 23:56:19
----------------------------------------------------------


Dear Mr. Goel,

Are you looking for consultants or contractors

Regards

Vipul Ahuja;nbsp;


On Wed, 27 Oct 2004 v.goel@eil.co.in wrote :
Dear Colleagues

I was interested in finding out organizations in Delhi which
carry out
rehablitation of corroded structures.

Regards
Virender Goel





Structural Engineers Forum of India  









----------------------------------------------------------

----------------------------------------------------------
Message From  acpl_sefi@rediffmail.com
Subject: BENDING OF BEAMS
Date: 28/10/04
Time: 00:01:28
----------------------------------------------------------


Check literature on residual stresses in AISC Manual of steel
construction ;amp; Specifications

Vipul Ahuja;nbsp;


On Wed, 27 Oct 2004 ABHYANKAR@hccindia.co.in wrote :
Dear SEFIANs,

Many times we are required to bend the ROLLED sections with
different
radius. This process is usually carried out in a jig / bending
machine or by
beam action. As the bent shape is retained by the Rolled section
(permanent
set) its a PLASTIC deformation problem.

Do anybody has guidelines about -
1) allowable stresses (without WEB/FLANGE buckling), which are
naturally
greater than  ;Fy ;
2) minimum allowable radius for bending
3) Care during bending operation

etc.

As the beam crosses elastic limit, all the equations become
useless.
Elasticity goes on reducing, deflection/rotation keeps on
increasing etc.

In practice expert-fabricators do it easily. How to cross check
/ prove this
mathematically.


----------------------------------------------------------------
-
Hindustan Construction Company, Mumbai, India
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Structural Engineers Forum of India  









----------------------------------------------------------

----------------------------------------------------------
Message From  ibarua@deguild.com
Subject: Daily Digest Wed Oct 27 23:00:02 2004
Date: 28/10/04
Time: 07:29:26
----------------------------------------------------------

28 October, 2004


Re.: Niigata earthquake - 2004
-------------------------

In 1964, there was a major earthquake in the Niigata region in Japan. A
major feature of that earthquake was large scale foundation failures of
buildings due to liquefaction of the sub-soil. Buildings settled by as
much as a metre due to the sub-soil behaving like a fluid rather than as
a solid during the earthquake. So far, reports on the Nigaata quake of
2004 do not specifically mention large scale foundation failures due to
liquefaction. We should be interested in knowing what lessons Japanese
engineers learnt from the 1964 earthquake.  

Indrajit Barua.
Guwahati, Assam.



----------------------------------------------------------

----------------------------------------------------------
Message From  sdec@bol.net.in
Subject: Quake in Japan
Date: 28/10/04
Time: 14:08:51
----------------------------------------------------------
Dear Alpa,
It is indeed quite unfortunate and seems to have caught them on the
wrong
foot! However prepared they may have been, the statistics are quite
shaking
and still more nerve rattling  is a thought which bothers most of
us--what
would be our fate under similar conditions?
Sangeeta
----- Original Message -----
Message From  alpa_sheth@vakilmehtasheth.com
To: sdec@bol.net.in
Sent: Tuesday, October 26, 2004 6:29 PM
Subject: Quake in Japan


Dear All,

I thought this would be of interest to all of you. From AP
(courtesy EERI
website)

Regards,
Alpa

23 PERISH AS QUAKES ROCK JAPAN

October 25, 2004 -- OJIYA, Japan - Tens of thousands of people
huddled in
emergency shelters yesterday after a series of earthquakes in
northern
Japan flattened homes, toppled bridges and derailed trains,
killing at
least 23 and injuring as many as 2,000.
A 6.8-magnitude quake rocked the largely rural Niigata prefecture
Saturday
evening, rattling buildings as far away as Tokyo.

Several strong quakes followed through the night, and aftershocks
jolted
the area early this morning, one a magnitude of 5.6.

The government said 23 people were killed and 1,232 were injured.

Public broadcaster NHK, citing hospital data, said more than 2,000
were
injured.

The dead included five children, the youngest a 2-month-old.

The quakes tore apart highways, burst water and sewage mains, and
knocked
out power to nearly 300,000 homes.

Some 61,000 people, many of them elderly, had to be evacuated.

Hospitals were so overwhelmed, the injured were being treated in
the
hallways.




AP








Structural Engineers
Forum of India  








----------------------------------------------------------

----------------------------------------------------------
Message From  lathav_81@yahoo.co.in
Subject: suggestion
Date: 28/10/04
Time: 17:34:42
----------------------------------------------------------
dear all

i need spectrum compatible acceleration according to
our IS 1893-2000  how ll i get it.pls give suggestion

with regards
latha

________________________________________________________________________
Yahoo! India Matrimony: Find your life partner online
Go to: http://yahoo.shaadi.com/india-matrimony


----------------------------------------------------------

----------------------------------------------------------
Message From  sdec@bol.net.in
Subject: rehablitation of corroded structures
Date: 28/10/04
Time: 18:37:12
----------------------------------------------------------
a contracting firm? u could possibly try kla constructions involved in a

large no of rehab projects.contact anurag:0911900399or9811119214 or
26160466.
reg.
sangeeta wij
----- Original Message -----
Message From  v.goel@eil.co.in
To: sdec@bol.net.in
Sent: Wednesday, October 27, 2004 3:54 PM
Subject: rehablitation of corroded structures


Dear Colleagues

I was interested in finding out organizations in Delhi which carry
out
rehablitation of corroded structures.

Regards
Virender Goel




Structural Engineers
Forum of India  








----------------------------------------------------------

----------------------------------------------------------
Message From  sikandarsiddiqi@yahoo.com
Subject: Quake in Japan / Our Fate  A Matter
of National Importance  Are we building German Nazi Concentration
Camps?
Date: 28/10/04
Time: 20:45:29
----------------------------------------------------------
Dear Engr.Sangeeta,  Delhi - India

IMPORTANT  

Please refer to my e-mail sent to Eq-conference recently; the complete
text of which is given below for your review and by all SEFI members and
subsequent opinions to be e-mailed through SEFI; mean while as TEST
Programs I request particularly Prof.S.K Jain to take up the matter with
the State Government of Delhi under SEFI - GoD Initiative and the State
Government of Gujarat as opportunity exists :

Dear Colleagues ; Friends,

In fact what caused national failure with regard to routine design of
earthquake resistant building (ERB) in spite of past 12(twelve) major
devastating earthquakes plunging the nation as a whole into total high
seismic non -safety range.We read history but we do not learn any thing
from history,so history repeats it self and so is now the grim
situation.

This is a very deep institutional failure of different government
agencies.What caused each of them to ignore earthquake threat is a great
mystery.This deserves the attention of  ;Believe It or Not ;.

FINANCIAL BLOCKADE

I propose to activate the attention of LOAN giving agencies to BLOCK
LOAN to construct residential ; commercial buildings by informing
them one basic and fundamental thing which is how they are going to
REALISE the loans provided to the applicants if the buildings are
damaged during a MAJOR EARTHQUAKE about which seismic experts are
predicting with reasonable accuracy? For loan giving agencies this is a
MAJOR ; PRIME ISSUE. Is not it?

So WHAT TO DO IS THIS all THE BUILDING LOAN GIVING AGENCIES should be
MOTIVATED to ask an APPLICANT that he has to JUSTIFY that the proposed
building is an EARTHQUAKE  RESISTANT BUILDING by submitiing SEISMIC
ANALYSIS REPORT - SPECTRUM METHOD along with PERFORMANCE ANALYSIS to
evaluate the building behaviour during an earthquake of applied
intesity,depending on the zone, say VIII or IX (MMIS) to find out the
location of plastic hinge initiation and to find out sequential hinge
formation up to collapse.This will be done through detailed 3 ( three
)dimensional computer modeling with reiforcement and joint detailing in
the model with push over analysis.

This proposal is like who will bell the cat ( rat story ) and only way
to go for ROUTINE desgn of EARTHQUAKE RESISTANT BUILDING.

Probably this is the ONLY way to CONTROL our FATE.

Thanks to Dear Engr.Sangeeta for your CONCERN which is a matter of
NATIONAL IMPORTANCE indeed.

With regards to you and all.

Engr.Sikandar Hayat Siddiqi
Project ; Seismic Design Management Engineer
;
Co-ordinator,Earthquake Anti-disaster Defence Management System
Initiative (EADMSI)
Dhaka - Bangladesh/Asia
Radio Link International E-mail


---------------Original Message----------

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