Tag: Live Technical Discussion

Categories
Civil Engineering News & Events Structural Engneering

Session 21 : Advice to Young Civil / Structural Engineers

Introduction

Civil engineering is one of the oldest branch of engineering and it is indeed a vast area! We believe that for appropriate growth of the young engineers and for the profession, frequent interaction is required with the senior professionals. With a small attempt towards creating bridge between young civil/structural engineers and the veterans, the live technical discussions are being organized.   

Speaker for the upcoming session

Expert : Dr. Subramanian Narayanan wrote a very successful book on Steel Structures, was the first comprehensive book based on IS 800:2007. This was followed by another outstanding book on RC Design. Both the books received award for best book from ACCE(I). His book on Space Structures also received this award in 2000, thus he has the distinction of hitting hattrick. Always keen to mentor young structural engineers through Structural Engineering Forum of India, sharing experiences and lessons learnt through books and technical papers.

Facilitator : Bhavin Shah

(Founder & CEO, SQVe Consultants)

Schedule for the event

Date : 13-AUG-21

Time : 7 PM IST

How to register for the event?

The registration is FREE. Please click on the following button and share your questions in the advance which we will attempt to address during the session.

REGISTER NOW

Looking to the huge response to the event, the session will be streamed live at three platforms, i.e YouTube, LinkedIn & Facebook.

YouTube
Linkedin
facebook

For any queries, you may contact us at the email address: contact@sqveconsultants.com

You may also watch the live video at the following screen:

Session 21 : Advice to young Civil / Structural Engineers – Dr. Subramanian Narayanan
Categories
Engineering News & Events Structural Engneering

LIVE TECHNICAL DISCUSSION SERIES

Thank you all for supporting the initiative of Live Technical Discussion series. Our aim is to arrange the live technical discussion on the areas related to engineering where in industry is facing practical difficulties. We had very interesting live technical discussions so far on the important subjects like Gravity column, Stiffness modifiers as per IS 1893 & IS 16700, Irregularities as per IS 1893, Time period calculation as per IS 1893, Recent amendments to IS 1893 & IS 13920, Interface between geotechnical and structural engineer, Wind force estimation for low rise buildings & tall buildings as per IS 875, Pile foundation, Quality assurance in structural engineering firms, etc.

There are many interesting live discussions at planning stage for other engineering disciplines as well.

In the comment box, you may mention the areas for which the future live technical discussions may be arranged. Also, please let us know if you would like to appear in the live stream to address the audience.

Pl circulate this message with the engineers in your circle.

You may subscribe the channel at this link to receive notifications when we go live : https://youtube.com/c/StructuralEngineering

Categories
Design of RCC structures News & Events

Session 14- Live Technical Discussion Series : Design of RCC Structures (PART 1)

Background :  We created a telegram group for structural engineers with a purpose of knowledge sharing and to serve as a medium for discussion related to technical matters, professional issues, guidance for young engineers, career advice, etc.

Link for joining the group : https://t.me/StructuralEngineering1

Dr. H. J. Shah had replied to number of queries in the group. In the next live session, we would like to summarise and present them along with the sketches. We wish to take up following points in the next live session :

  • The building columns are classified based on various criteria as (a) Braced and unbraced, (b) No-sway and sway, (c) Tied, spiral and Composite, (d) Short and long, (e) Axially loaded and eccentrically loaded, and (f) Ordinary and Ductile.
  • The buildings are classified based on the type of columns and walls occurring in them. Both are dependent on each other.
  • In addition to primary stresses, Gravity loads result in buckling, while horizontal loads try to overturn the building. In both the cases, moments are induced. Sufficient factor of safety should be there against overturning.
  • Buckling of a local column due to gravity loads is taken into account by using additional moments in columns which may be negligible (short column) or considerable (long column). To decide whether the column is long or short, we need effective length of the column that can be determined as per guidance of IS: 456.
  • Horizontal loads result in building sway. This sway may be negligible or considerable. The total horizontal shear acting on storey, Vi, will induce a moment equal to Vi hi where hi is the height of the ith storey.  This is called primary moment.
  • Relative sway of consecutive storeys is called drift. Due to drift, the vertical loads become eccentric and induce moments equal to, where  is drift of the storey. This is called P effect. The total moment induced due to loads on all vertical elements of the storey = S P, is called secondary moment.
  • Ratio of secondary moment to primary moment represents an index of stability of the building called stability index, Q. If Q is not greater than 4%, the lateral sway may be neglected and the columns in the storey may be considered as no-sway. If Q > 0.04, the columns in the storey may be considered as sway. IS: 16700, refers Q as inter-storey drift stability coefficient, q. For stability of building, .
  • Once the loads on the columns are calculated, we can design the columns. Note that there are a number of load combinations through which the column should pass.
  • Interaction diagrams are prepared for column design. These may be global or local.
  • The interaction diagrams as prepared by SP: 16 are global and can be used for variety of dimensions and materials used in columns.
  • An interaction diagram as prepared for one column with given dimensions and materials is called a local interaction diagram. It will be used to design a particular column with a number of load combinations.
  • Columns for a given storey are designed at top and bottom with given load combinations. If I am considering 25 load combinations, one column should pass through 50 column design calculations. Then one can get area of reinforcement.
  • Deciding the sizes of columns, the grade of materials along the height of the building requires through knowledge. Similarly, arranging the reinforcement along height, number and diameter at a section, is also a skilful job.
  • After arranging all, you need to satisfy strong column – weak beam analogy as per IS: 13920.

We wish to take up the above-mentioned areas in the upcoming live session. For making the session more successful, you are all requested to send your queries in advance. This will facilitate us to arrange the queries in order and prepare sketches for clarification, if required.

You are also requested to send your queries for following topics.

  • Shear Wall- Design and detailing of isolated shear wall
  • Hidden beam,
  • Floating columns,
  • Live load reduction

The session will be live streamed at the following youtube channel. You may subscribe and share details of the youtube channel with interested engineers to receive the wider participation from group of engineers :

https://youtube.com/c/StructuralEngineering