Session 34 : Critical Review of IS 1893 (Part 1) : 2016 - Dr. Ashok K. Jain

#structuralengineering #earthquakeengineering #livetechnicaldiscussion
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Brief about the topic:
Centuries ago, a large number of astonishing structures such as Kutub Minar, Taj Mahal and so many incredible palaces and temples were built in stone masonry in various parts of the country. Some of these temples have very tall shikhars with amazing carvings. They have so many delicate columns and non-structural elements. They are standing even today without any damage due to past earthquakes. However, is it possible to build similar stone masonry structures today? NO. IS 1893 (Part 1) will not let you. It has banned such structures explicitly in seismic zone III, IV and V.
The question arises who is wrong? Our ancestors or the modern day IS 1893 (Part 1) code? (Extract from paper of Dr. Ashok K. Jain)
The original paper was presented by Dr. Ashok K. Jain in the meeting of IAStructE on 11th May, 2017. Since then, a number of practicing engineers have made requests to discuss the various issues in more detail. In 2020, BIS has issued amendment no. 2 which is quite exhaustive. Recently, Dr. Jain has modified the document based on request of the practicing engineers.
In the upcoming live technical discussion, Dr. Ashok K. Jain will share his critical review about IS 1893 (Part 1) : 2016.
About Speaker
Dr. Ashok K. Jain is currently a structural consultant having over 40 years of experience. Formerly, a Professor of Civil Engineering at the Indian Institute of Technology Roorkee, Roorkee. Dr. Jain received his Ph.D. in Civil Engineering from the University of Michigan, Ann Arbor, MI in 1978. He received gold and silver medals in B.E. (Civil Engineering) and M.E. (Structural Engineering) at the University of Roorkee, Roorkee. He is well known for imparting latest knowledge on each subject/topic through latest analytic tools such as MATLAB, MS Excel, SAP2000, and ETABS.
Dr. Jain has published over 50 refereed journal papers and over 60 conference papers on various topics. He has authored five text books:
Dynamics of Structures with MATLAB Applications, Published by Pearson (2016)
Reinforced Concrete - Limit State Design now in its 7th edition (2012) - This book has the distinction of being the first book on the subject published in 1983 in India and enjoys excellent reputation till date.
Advanced Structural Engineering with Finite Element Method, 3rd edition (2015)
Strength of Materials and Structural Analysis, 2nd edition (2008)
Fortran programming, second edition (1990) - now discontinued
He has delivered keynote addresses in many conferences and conducted short specialist courses on Reinforced Concrete, water retaining structures, ductile detailing of structures, dynamics of structures and earthquake resistant design.

[@StructuralEngineering]

After going through the vide, please feel free to share additional comments/feedback/discussion points, etc. in the below comment box. We will workout certain mechanism for responding the same.

[@GopalSingh-uo8uq]

Sir, Fantastic session, Please arrange a Session on IS13920-2016 also . We will be very grateful for you.

[@StructuralEngineering]

Certainly, we will arrange a discussion on IS 13920:2016 as well.

[@hariharanathkristipati9207]

What an in depth knowledge on seismic analysis and design... horrible to believe that may caveats in the standards set by Codal guidelines.Ut must be brought to the notice of Prime Minister Modi to cleanse our system of writing codes.

[@StructuralEngineering]

You may connect with is through email address: [e-mail] for further discussion.

[@hariharanathkristipati9207]

There was a question asked on why in 2016 version 1893 code the clause related to increase in allowable stresses of concrete and steel removed. In fact this was giving good leverage with optimised designs while calculating crackwidth for flexure in seismic combination loads especially in liquid retaining structures. Dr.Jain sir views can be gathered please

[@StructuralEngineering]

You may connect with is through email address: [e-mail] for further discussion.

[@sudarshannikam5243]

Thanks for this detailed explanation.
Sir, Should we use Static Equilibrium Forces (Forces by Empirical formula EQX, EQZ ) in load combination while building design by using Response spectrum method with dynamic forces RSX, RSZ horizontal orthogonal forces(Not vertical force considered)? or Should we ignore EQX, EQZ Static forces and participate only with Dynamic forces RSX & RSZ in load combination.
Do we use Static Equilibrium Forces only for compare base shear (Static & Dynamic base shear ) to factorize by Vb/VB to Dynamic base shear? My main quarry is ,Should we use Static Equilibrium Forces in Dynamic Response Spectrum in load combination or not? Means to use only dynamic forces RSX, RSZ in load combination with ignoring Static forces EQX, EQZ. Please guide me.

[@StructuralEngineering]

You may connect with is through email address: [e-mail] for further discussion.

[@vamsikrishna-jb2wu]

Great Lecture sir

[@StructuralEngineering]

Thank you for the message. We are glad that you have liked the session.

[@IndianWarriors]

Great 😃👍

[@StructuralEngineering]

Thank you for the message.