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  Topic: IS:1893-2016

Replies: 20
Views: 13372

PostForum: SEFI General Discussion   Posted: Wed Jul 12, 2017 4:29 pm   Subject: IS:1893-2016
Unless you have a lot of shear wall in the building, you won't be able to meet the H/1000 drift limit for seismic. See Note 4. So before you go down too far into the process, check drift to make sure ...
  Topic: Revised BIS Codes 1893-I and 13920- Inviting Comments

Replies: 6
Views: 4339

PostForum: SEFI General Discussion   Posted: Wed Jul 05, 2017 11:07 pm   Subject: Revised BIS Codes 1893-I and 13920- Inviting Comments
Yes, the option of flat slabs has been completely removed using a stringent drift limit. It might have been better to say flat slabs are not allowed instead of saying that flat slab buildings have to ...

Replies: 7
Views: 11460

PostForum: SEFI General Discussion   Posted: Sun Jun 15, 2014 4:12 am   Subject: CRACKING IN AAC BLOCK WALLS
Is there a compressible fill between the top of the wall and the slab? Is it possible that a "non-load bearing" wall is picking up load from the deflection of the slab/beam above?
  Topic: Boundary Element Length

Replies: 3
Views: 1859

PostForum: SEFI General Discussion   Posted: Sun Sep 15, 2013 9:48 am   Subject: Boundary Element Length
Fellow Engineers:

As far as determining whether a boundary element is required, it is based on if the stress at the extreme compression fiber exceeds 0.2 fck.

However, how do you go about determ ...
  Topic: Slab modelling in ETABS -membrane, plate or shell ??

Replies: 19
Views: 30253

PostForum: SEFI General Discussion   Posted: Thu May 02, 2013 10:03 pm   Subject: Slab modelling in ETABS -membrane, plate or shell ??
When you have a beam-slab or when you have precast floors, it is advisable to model them as membrane elements in order to capture the beam forces/moment correctly.

When a shell element is defined ( ...
  Topic: Time period-Tall Building Design

Replies: 16
Views: 23627

PostForum: E-Conference on Tall Buildings   Posted: Thu Nov 22, 2012 8:47 am   Subject: Time period-Tall Building Design
There are no limitations, but the American Codes have limitations on minimum base shear based on a building with long time period (I think T = 10s). Beyond that the response spectrum flattens out mean ...
  Topic: Pointed discussions on tall buildings - Use of Flat Slab -co

Replies: 27
Views: 30540

PostForum: E-Conference on Tall Buildings   Posted: Thu Nov 22, 2012 7:58 am   Subject: Pointed discussions on tall buildings - Use of Flat Slab -co
A flat slab building with only shear walls for lateral load resistance can be used provided adequate consideration of deformation-compatibility is done at the slab-column junctions.

I believe there ...
  Topic: Slab Thickness for Two way slab

Replies: 4
Views: 2389

PostForum: SEFI General Discussion   Posted: Fri Aug 24, 2012 11:06 am   Subject: Slab Thickness for Two way slab
Such a table is available in ACI 318, with and without drop panels. Table 9.5 (c)
  Topic: ETABS Element output

Replies: 1
Views: 1440

PostForum: SEFI General Discussion   Posted: Thu Jul 19, 2012 9:28 am   Subject: ETABS Element output
Moment per unit length , unit is the chosen unit (mm, m or cm)
  Topic: stiffners

Replies: 20
Views: 8644

PostForum: SEFI General Discussion   Posted: Tue Jul 17, 2012 2:16 am   Subject: stiffners
Web stiffeners are usually added to satisfy a member's local limit state. They should have no effect on the member's global capacity, i.e., member stress ratios in the analysis program.

Again, coul ...
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