STRUCTURAL ENGINEERING FORUM OF INDIA [SEFI]

Econf_Moderator · E-Conference Moderator Joined: 26 Feb 2012 Posts: 23

Greetings!

Welcome to the third day of the E-conference on 'IS 16700- Criteria
for Structural Safety of Tall Concrete Buildings'.

We hope you have had two good days of discussions. We certainly are
very encouraged by the quality of queries and responses. Yesterday
most of the queries that were posted have been very well responded to
by fellow SEFIANS. Seems like SEFI has grown into a solid, curious and
enlightened group of structural engineers!

We will be extending discussion on Section 8 today ie Structural
Design. And of course, discussions on Sections 1 to 7 can also
continue.

best regards,

SEFI Moderators

Posted via Email

bijoyav · ... Joined: 13 Dec 2008 Posts: 111

FRAMED TUBE SYSTEM, TUBE IN TUBE SYSTEM, MULTIPLE TUBE SYSTEM

"8.7.3 Column spacing of framed tube shall preferably
be not more than 5 m."

It is well known that the lesser the column spacing, the more is the
advantage. If so, why such a guideline, that is too fluid, in this
code, such as "preferable" to be less than 5m.

I feel, specific guideline can be given. At least a range.

Posted via Email

bijoyav · ... Joined: 13 Dec 2008 Posts: 111

"NON STRUCTURAL ELEMENTS

10.1 DESIGN STRATEGY

NSEs shall be classified into three types depending on their
earthquake behavior, namely
1. Acceleration sensitive NSE
2. Deformation Sensitive NSE
3. Acceleration & Deformation sensitive NSE"

Now a days, it is a trend to have car lifts and bringing cars to
higher stories. Definitelythis will increase.

While considering mass of cars, this create a lot of confusion. To me,
cars become acceleration sensitive if hand brakes are on along with
gear. If it is in neutral gear, what would be its condition? If hand
brakes only? In first gear with out hand brakes? How to model this?

Posted via Email

bijoyav · ... Joined: 13 Dec 2008 Posts: 111

"8. STRUCTURAL DESIGN

8.1.2 STAIR CASE"

The code allows to built the staircase integral with the structural
system, even if not confined with structural walls, if modeled,
analyzed and designed as a structural element.

I feel, this can also be adopted in IS 4326, along with (i) separated
staircases, (ii) Built in stair cases & (iii) staircase with sliding
joints.

Posted via Email

Ranjith.Chandunni · Gold Sponsor Joined: 16 Nov 2012 Posts: 6

Dear All,
We are almost coming to end of third day of discussion covering up to Section 8 of the code. There has been a very good participation with lots of queries and many have been responded by fellow SEFIans.
We would encourage everyone to put forth your comments and queries up to Section 8 today before we move on to Sections 9 & 10 tomorrow.
Best regards,
Ranjith Chandunni