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  Topic: Ductile coupled shear wall (DCSW) system
hemalmistry

Replies: 0
Views: 664

PostForum: SEFI General Discussion   Posted: Fri Jan 01, 2021 5:51 am   Subject: Ductile coupled shear wall (DCSW) system
Dear SEFI members,

Building with ductile coupled wall system (DCWS) as lateral load resisting system (LLRS) is more effective compared to building with ductile / special walls, if designed and deta ...
  Topic: HIGH STRENGTH REINFORCEMENT FOR GRAVITY AND SEISMIC APPLICATION
hemalmistry

Replies: 0
Views: 1015

PostForum: SEFI General Discussion   Posted: Sat Nov 21, 2020 4:40 pm   Subject: HIGH STRENGTH REINFORCEMENT FOR GRAVITY AND SEISMIC APPLICATION
Dear SEFI Members,

IS:13920-2016 allows use of use of Fe 415 or lower grade reinforcing bars confirming to IS 1786 and satisfying requirements of clause 5.3.2 and 5.3.3 in Special moment resisting ...
  Topic: MODELING FOR BACKSTAY ANALYSIS AS PER IS:16700-2017
hemalmistry

Replies: 0
Views: 832

PostForum: SEFI General Discussion   Posted: Fri Nov 06, 2020 1:55 pm   Subject: MODELING FOR BACKSTAY ANALYSIS AS PER IS:16700-2017
Dear SEFI members,

In clause 8.1.3.2, IS:16700-2017 have specified modeling requirement for sensitivity analysis for single tower or multiple towers with common podium, which are qualified for eval ...
  Topic: IS 16700 - Wall+Perimeter Frame as Dual System
hemalmistry

Replies: 2
Views: 1057

PostForum: SEFI General Discussion   Posted: Thu Oct 29, 2020 3:38 am   Subject: IS 16700 - Wall+Perimeter Frame as Dual System
Clause 8.4.2 does not require structural wall+moment frame system to be designed as dual system.

Structural wall+moment frame system or structural wall+perimeter frame (without flat slab/slab-colu ...
  Topic: Torsional requirements clause
hemalmistry

Replies: 3
Views: 1101

PostForum: SEFI General Discussion   Posted: Sat Aug 08, 2020 6:42 am   Subject: Re: Torsional requirements clause
This one is valid situation, not addressed in code. However, in one of the international codes, such situation is handled as attached here, which states that if actual drift is very less than permissi ...
  Topic: MINIMUM DIMENSIONS OF SLABS AND BEAMS IN UPCOMING / PROPOSED IS 456
hemalmistry

Replies: 1
Views: 866

PostForum: SEFI General Discussion   Posted: Sun Jun 07, 2020 3:07 pm   Subject: MINIMUM DIMENSIONS OF SLABS AND BEAMS IN UPCOMING / PROPOSED IS 456
Dear members,

Following points related to minimum dimensions of slabs and beams needs attention in upcoming / proposed IS 456:

(1) Minimum thickness/depth recommended for non-prestressed (RC) on ...
  Topic: DESIGN OF OMRF AND ORDINARY WALLS IN PROPOSED IS:456
hemalmistry

Replies: 0
Views: 650

PostForum: SEFI General Discussion   Posted: Sun May 31, 2020 12:17 pm   Subject: DESIGN OF OMRF AND ORDINARY WALLS IN PROPOSED IS:456
Dear Members,

All structural members (SMRF, special wall & coupling beams, gravity elements,joints etc) of buildings in seismic zone 3,4 & 5 needs to be designed as per IS:456 along with ad ...
  Topic: STEEL REINFORCEMENT REQUIREMENT IN PROPOSED 456, IS 13920, IS 16700 AND IS 1786
hemalmistry

Replies: 0
Views: 752

PostForum: SEFI General Discussion   Posted: Sun May 24, 2020 6:55 pm   Subject: STEEL REINFORCEMENT REQUIREMENT IN PROPOSED 456, IS 13920, IS 16700 AND IS 1786
Dear Members,

Presently IS:456 allows use of steel reinforcement which confirms to IS 1786 but not confirms to IS 13920 in OMRF and ordinary walls in zone 2.

IS 13920 & IS 16700 have some a ...
  Topic: Requirement of major changes for Prestress concrete codal provisions in upcoming IS 456
hemalmistry

Replies: 0
Views: 655

PostForum: SEFI General Discussion   Posted: Sun May 24, 2020 4:49 pm   Subject: Requirement of major changes for Prestress concrete codal provisions in upcoming IS 456
Dear Members,

Many of us have attended the webinar on "proposed changes to IS 456 and IS 1343" organized by SEFI on 14th may 2020. We are expecting major changes in existing codal provisi ...
  Topic: Stiffness modifiers (effective stiffness) for analysis_IS:1893-1-2016 vs IS:16700-2017 vs upcoming IS:456
hemalmistry

Replies: 0
Views: 751

PostForum: SEFI General Discussion   Posted: Sun May 24, 2020 11:07 am   Subject: Stiffness modifiers (effective stiffness) for analysis_IS:1893-1-2016 vs IS:16700-2017 vs upcoming IS:456
Dear Members,

In upcoming 456, cracked section properties (effective stiffness) are specified for various structural elements based on type of loads (EQ and Non-EQ), however level of load (service ...
 
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