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sub: tall building code IS 16700 / 2017

 
This forum is locked: you cannot post, reply to, or edit topics.This topic is locked: you cannot edit posts or make replies. Thank Post    www.sefindia.org Forum Index -> E-conference on IS 16700 13th March to 18th March 2018
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k.gangadharan
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PostPosted: Fri Mar 16, 2018 12:56 pm    Post subject: sub: tall building code IS 16700 / 2017 Reply with quote

to econf@sefindia.org (econf@sefindia.org)
sub: econference of tall buildings as per Is IS 16700/2017
Cl. 7.3.10 The flexibilty of the building shall be such that the flexibility of inter storey drift stability coefficient -[theta (Pu Delta/H)] exceeds 0.2 ,where Theta is not defined. This may be clarified or defined. whether Pu refers to the particular floor for which interstorey drift is calclated or not.Pu is definedin cl.4 symbols.
Cl. 7.3.14 multiple towers connected by a single podium shall be modelled separtely and integrally. DOES THIS MEAN THAT EACH TOWERS SHALL BE MODELLED SEPARATELY WITH THE PODIUM OR WITHOUT THE PODIUM AND ANOTHER MODEL WITH TWO TOWERS TOGETHER WITH THE PODIUM. IS THIS THE SAME CASE WHEN THERE IS EXPANSION JOINT WITH PODIUM AND TWO TOWERS.thanks & regardsGangadharan.k

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va
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Joined: 26 Jan 2003
Posts: 79

PostPosted: Fri Mar 16, 2018 4:04 pm    Post subject: sub: tall building code IS 16700 / 2017 Reply with quote

Dear All,

  1. More clarification on Cl7.3.10 on how to calculate inter storey drift stability coefficient is required which is not clear. If some one explains with some numbers it will be helpful.
  2. What is expected under clause 7.2.d for P- delta analysis shall be clarified. Is this for static earthquake base shear and dead loads?
  3. Clause 9.7.1 clarification on zoned spring constants is required. It should be clearly mentioned that in plan area of raft variation of strata can be considered by using appropriate spring constants.
  4. I personally feel that combined building model including structure + raft on springs should not be used. Superstructure and substructure modelled should be separately analysed and not mixed together. As the springs are compression only springs and thus iterative analysis is required to find the contact area for each load combination. I would like to know comments from experts.


Regards.
Hemant Vadalkar
Consulting Engineer
Mumbai.

From: k.gangadharan <forum@sefindia.org>
Sent: 16 March 2018 18:30
To: econf@sefindia.org
Subject: [E-CONF] sub: tall building code IS 16700 / 2017



to econf@sefindia.org (econf@sefindia.org) (econf@sefindia.org (econf@sefindia.org))
sub: econference of tall buildings as per Is IS 16700/2017
Cl. 7.3.10 The flexibilty of the building shall be such that the flexibility of inter storey drift stability coefficient -[theta (Pu Delta/H)] exceeds 0.2 ,where Theta is not defined. This may be clarified or defined. whether Pu refers to the particular floor for which interstorey drift is calclated or not.Pu is definedin cl.4 symbols.
Cl. 7.3.14 multiple towers connected by a single podium shall be modelled separtely and integrally. DOES THIS MEAN THAT EACH TOWERS SHALL BE MODELLED SEPARATELY WITH THE PODIUM OR WITHOUT THE PODIUM AND ANOTHER MODEL WITH TWO TOWERS TOGETHER WITH THE PODIUM. IS THIS THE SAME CASE WHEN THERE IS EXPANSION JOINT WITH PODIUM AND TWO TOWERS.thanks & regardsGangadharan.k


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