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SEISMIC JOINTS

 
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kishorpss
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PostPosted: Wed Mar 06, 2019 5:12 am    Post subject: SEISMIC JOINTS Reply with quote

Dear Senior Sefians,

I am requesting all to through light on the above subject.

Design of a large size building of G+2 storied is under progress. Due to its large plan area, it is divided into 10 parts with separation joints.

As per clause 7.11.3 separation between Adjacent units of IS 1893 (Part1): 2016, the calculated separation gap joints are coming 450 mm.

Sefians are requested to provide solutions to overcome the problem.

Thanks in advance.

Kishore
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sukanta.adhikari
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PostPosted: Thu Mar 07, 2019 5:32 am    Post subject: Re: SEISMIC JOINTS Reply with quote

del

Last edited by sukanta.adhikari on Mon Mar 11, 2019 4:10 am; edited 1 time in total
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mjnasar
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PostPosted: Thu Mar 07, 2019 10:54 am    Post subject: Reply with quote

Dear Engs,

Please correct the following case ( IS 1893 (Part1): 2016)

Supposing:

G+1 Assume as 8mtsmax height

Response ReductionFactor = 3 ( OMRF)

Deflection ofbuilding as per Ch 6.4.3 ( elastic deformation from analysis program  for Service combinations )

Say Max allowableDeflection  or Storey  drift = 0.004* 8000 = 32mm

The Separation Gap Should beas per 7.11.3

( R1 delta1 + R2 delta 2) = (3 * 32 + 3 * 32 )  = 192mm max

Regards


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structuralprashant
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PostPosted: Mon Mar 11, 2019 6:45 pm    Post subject: Re: SEISMIC JOINTS Reply with quote

sukanta.adhikari wrote:
del

Dear fellow members,
In my opinion it will be suitable to provide the gap as per requirement and bridge it with flexible or easily yielding material, so that impact of one part is not carried to the adjoining structures. Er. Patwe
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kishorpss
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PostPosted: Tue Mar 12, 2019 10:01 am    Post subject: Reply with quote

Dear Er. mjnasar,

Allowable drift is 0.004%. For the 1mtr height of the building, allowable drift is 4mm of each side. Hence for 1mtr height, allowable thickness of separation joint is ((4mm+4mm)*5) 40mm considering Response reduction factor as "5". For the total height of the building of 10.00mtr separation gap thickness required is 400mm.


Dear Er. prashant,
I need to know the flexible or easily yielding material used in the present scenario.


Thanking you.


KISHORE
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structuralprashant
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PostPosted: Wed Mar 13, 2019 6:25 pm    Post subject: Reply with quote

Dear fellow member, Just send the cad file showing positions of structural members, so that it will be possible to suggest a solution. patweconsultant@gmail.com
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kishorpss
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PostPosted: Sat Mar 16, 2019 11:51 am    Post subject: Reply with quote

Dear Er. Prasanta,

Please check mail.

Brgds,

KISHORE
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