Category: Structural Engneering

Categories
Engineering Steel structure Structural Engneering

Session 18 : Important Design & Construction Parameters for Industrial PEB Structures at Tender Stage

This article is referred to the industrial structures (main plant building) for different industries like manufacturing, automobile, plastic, food, glass, ceramic, etc. which are executed with the concept of Pre Engineered Building (PEB).

For design of PEB structures, generally, the owner / client is appointing a structural consultant for preparation of the tender. The tender is published in the market for inviting bids from different PEB vendors. Based on the techno-commercial evaluation, the optimum bid is selected and the project is awarded to the relevant PEB vendor. The overall purpose of tender is to bring all the bidders at a par and to ensure implementation of the important parameters in design, fabrication, erection, etc.

In view of the above, tender for PEB structure is an extremely important step in the project cycle. I have experienced that tender from consultant to consultant vary in terms of inclusion of different parameters.  

Following are few of the important parameters which may be included in the PEB tenders:

  • General arrangement drawing of the structure
  • Overall structural system
  • Design codes and standards
  • Yield stress of the material
  • Durability aspects
  • Basic wind speed
  • Permeability of the building for calculation of cpe & cpi
  • Earthquake zone
  • Clarity on section 12 of IS 800:2007
  • Live load on the mezzanine floor
  • Support condition to be considered at junction of steel structure & RCC pedestal
  • Slenderness ratio of bracings
  • Deflection criteria
  • Crane loading
  • Interface between crane manufacture and PEB vendor
  • Fire resistance as per requirement
  • Provisions for design of anchor bolt
  • Standard details
  • Tolerance on fabrication

We are planning to arrange live discussion on this topic on 18-APR-21 at 11:00 AM IST.

Er. Dr. Abhay Gupta will join the discussion as guest expert. He has obtained his BE(Civil) in 1981 & subsequently ME(Structures) from SGSITS Indore; and Ph.D. from University of Roorkee, Roorkee (now IIT Roorkee) in the area of “Aerodynamic Interference in Tall Rectangular Buildings: Wind Tunnel Studies” in 1996. He has more than 35 years of experience in the field of Civil Engineering construction and Structural design. Dr. Abhay Gupta is one of the Directors of Skeleton Consultants Pvt. Ltd. Noida. Dr. Gupta has also worked as Principal consultant for establishment of Wind tunnel facility at Guna MP.

REGISTER NOW FOR THE EVENT

(Registration is Free.)

Your discussion points are welcome in advance in the below comment box or at above link so that it would help us to structure the discussion.

Categories
Engineering News & Events Structural Engneering

Opportunities in Structural Engineering – For young structural engineers

Structural Engineering is indeed a vast area and there are plenty of areas in which skills can be developed. Structural engineering is a prime discipline taking responsibilities of safety and stability of the structures. With this, there are ample opportunities in the field of structural engineering for young structural engineers.  

With an aim of creating bridge between veteran structural engineers and young structural engineers, we are planning series of live discussions. First of its kind of session is planned as follows:

DATE :  4-APR-21

TIME :  11:00 AM IST

Our Panelist:

  • Olavo Carvalho  –  Consulting Civil Engineers at A. Olavo Carvalho
  • Kamal Parekh – MD & CEO, Shri Sarjan Technocrats Pvt. Ltd
  • Suhas Mujumdar –  Director, Asi consultant
  • Anal Shah –  N K Shah consulting engineers LLP
  • Hiren Desai – SAI Consultants
  • M. Arunkumar – CEO, Indes Structural Design Consultant Pvt Ltd., Chennai

Facilitator : Bhavin Shah – Founder & CEO, SQVe Consultants

Methodology :  

  • The session will be conducted using ZOOM software.
  • At the beginning of session, each panelist will share their perspective and view point related to the opportunities in structural engineering.
  • Thereafter, we will take up points from the participants through live chat.
  • We encourage participants to share their discussion points in advance, if possible. It will help us to structure the discussion.

Click below for registration

Registration is FREE but mandatory. Link for the participation will be shared with the registered participants since there are limited seats.

REGISTER NOW

Categories
News & Events Steel structure Structural Engneering

Design of PEB structures Challenges and Way forward (Part 1)

We have seen the difference of opinion between group of engineers while designing the PEB structures. I believe there are many areas related to PEB structures wherein discussion is required. We have received many requests from engineers to host a live discussion on this important subject. 

Few of the questions, received from the group of engineers are listed below:

1)    What are the differences between design of PEB and conventional steel structure?

2)    What are the codes to be followed for design of PEB structures?

3)    Is section-12 of IS 800:2007 is applicable to PEB structures?

4)    How to design the anchor bolts for PEB structures?

5)    How to decide support condition for PEB structures?

6)    What are the design parameters to be considered in the software for design of PEB structures?

7)    How to decide minimum web thickness for built up I sections?

8)    How to estimate wind force for design of the low-rise structures?

9)    What is lateral torsional buckling and why it is critical limit state for PEB structures?

10) Can we consider Z purlins as giving lateral support to main rafter?

 As it is a vast area, we are planning to create short term modules for design of PEB (steel) structures focusing on the practical difficulties.

With an aim to collate such practical difficulty areas in design of PEB structures, the live technical discussion is organized.

 Date : 14-MAR-21

Time : 11:00 AM IST

Facilitator : Bhavin Shah, Founder & CEO – SQVe Consultants

Link for joining the live stream :

(Please subscribe the youtube channel to receive the notification when we go live.)

Engineering – youtube

The entire recorded session of 14th March can be seen at the following link:

Design of PEB structures – Live Technical Discussion

Please share the areas wherein practical difficulties are being faced while design of the PEB structures in the below comment box.

Categories
News & Events Structural Engneering Wind engineering

Session 15 : A Q&A Session with Tony Rofail from Windtech on Wind Tunnel Testing of Tall Buildings

In continuation with the well received live panel discussions on what IS 875 : Part 3 says about the estimation of wind loads on tall buildings, Tony Rofail from Windtech has agreed to participate in another live discussion on Wind Tunnel Testing of Tall buildings. This will be an interactive session where attendees can have their most pressing questions asked and learn about current best practice in wind engineering.

The webinar will start with the regulatory framework: when is it mandatory in India to use a wind tunnel study to determine the design loads on a tall building? Also, when is it economically beneficial to do so.

There are a number of wind tunnel testing methods to determine the loads on tall building structures. Each method has its particular advantage and limitation. This presentation will shed some light on which method is most suited to which type of tall building structure.

This Webinar will also elaborate on some of the more advanced analysis techniques used for the study of the response of tall buildings that exhibit complex modal behaviour or have a complex form such as rigid connections at high elevation and their effect on the transfer of wind loads between the sub-structures.

The effect of different methods of accounting for the directionality of the local wind climate will also be discussed.

The presentation will include some basic tips on how the building form can be optimised to significantly reduce the dynamic response of a tall building.

This live webinar cover the following learning objectives:

1. When is it mandatory and when is it recommended to undertake a wind tunnel study for tall buildings?

2. The various testing techniques available and which type should be used for what type of tall building structure.

3. How small changes to the building form can bring about significant reduction to the overall loads on a tall building structure.

Speaker : TONY ROFAIL – DIRECTOR, PRINCIPAL

No alt text provided for this image
Tony Rofail – Windtech

Tony has over 33 years’ combined experience as both researcher and consultant in wind engineering including 30years with Windtech Consultants, a global consulting firm specialising in the study of wind effects and sustainable design. Tony is one of Windtech’s founding directors and has been with the firm since its establishment in April, 1991. His research includes reliability of wind tunnel studies, interference excitation of tall buildings, analysis techniques to accurately determine the effect of coupled modes and rigidly linked sub-structures and well as Wind Noise in Buildings, Natural Ventilation and review of assessment Criteria for Pedestrian Comfort.

Tony Rofail has undertaken and supervised over 2,500 wind engineering studies including wind tunnel investigations for various high-rise buildings, large roof and stadium building projects around the world, including many landmark projects.

Facilitator : Bhavin Shah- Founder & CEO, SQVe Consultants

DATE : 21-FEB-21
TIME : 11:00 AM ( Indian Standard Time)

Link for registration : 

https://windtechconsult.com/a-qa-session-with-tony-rofail-on-wtt-of-tall-buildings/

Also, may please share the questions in the below comment box which you would like to get addressed during the live technical discussion.

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
Geotechnical Engineering News & Events Structural Engneering

Session 12 – Discussion on Pile Foundation – Live technical discussion

Join us for live technical discussion related to “Pile foundation” on 10-JAN-21 at 11:00AM IST. We are going to discuss the important areas related to geotechnical and structural aspects of the pile foundation.

Please share your points of discussion in the below comment box which will be taken up during the live session. Vivek Kumar MITRA will join as a guest expert during the session.

Link for joining the session is mentioned in the first comment below.

Please tag or share this message with the interested engineers in your circle.

Facilitator : Bhavin Shah (Founder & CEO, SQVe Consultants)

An initiative of SQVe Consultants
(Enhancing the engineering profession)

We will discuss following areas during the session. Please suggest the other points which may be taken up during the live session.

1. When pile foundations are required?
2. What are the different types of piles and their applications?
3. How to decide diameter and length of pile?
4. What are the major factors affecting pile capacities?
5. Can we go ahead with only friction piles?
6. What is negative skin friction for piles?
7. What are the different tests required to ascertain pile capacity?
8. Is it mandatory to perform pile test?
9. What is PDA and how it is useful for pile testing?
10. Major steps for performing structural design of piles
11. What are secant piles?

Session 12 – Discussion on Pile Foundation – Live technical discussion

Categories
News & Events Online Courses Steel structure Structural Engneering

Decoding IS 800:2007 for design of steel structures

Please participate in the unique 2 days’ workshop on 26-DEC-20 & 27-DEC-20 (10:30am to 1:30pm) named as “Decoding of IS 800:2007 for design of steel structures”. It is organized by MX Business Media. In the workshop, we will address some of the challenges being faced by practicing engineers while design of the steel structures as per IS 800:2007.

Link of registration for the workshop:  Please participate in the unique 2 days’ workshop on 26-DEC-20 & 27-DEC-20 (10:30am to 1:30pm) named as “Decoding of IS 800:2007 for design of steel structures”. It is organized by MX Business Media. In the workshop, we will address some of the challenges being faced by practicing engineers while design of the steel structures as per IS 800:2007.

Expert sessions by : Bhavin Shah (Founder & CEO, SQVe Consultants)

Link for registration at the workshop:  https://zoom.us/webinar/register/5516087190758/WN_c1fK0feHR3CoEfiiiyxjbg

Categories
Geotechnical Engineering News & Events Online Courses Structural Engneering

First LinkedIn Live session – Importance of interface between Geotechnical engineer & Structural engineer

Glad to announce our first LinkedIn Live session on 24-DEC-20 at 11:00AM IST related to importance of the interface between Geotechnical engineer & Structural engineer.

For safety & stability of the structure as well as for the cost optimization, interface between geotechnical engineer and structural engineer is extremely important in the project. We will discuss few such important interface areas and also, we will take up the discussion points suggested by the participants through live chat.

Vivek Kumar MITRA (Founder & CEO, VKM Geotechnics) will join us in the live session.

https://www.linkedin.com/posts/bhavin-shah-ceo_for-safety-of-the-structure-and-cost-optimisation-activity-6747135517843865600-0a_d

Categories
Earthquake Engineering News & Events Structural Engneering

Session 11 : Amendment no. 2 for IS 1893 (Part 1) : 2016 & IS 13920 : 2016

Recently, BIS published the amendments related to IS 1893 (Part 1) : 2016 & IS 13920 in November, 2020. The article shows some of the major changes made in the code as per my understanding. Only brief details are mentioned below, for details please refer the amendments.

Amendment no. 2 of IS 1893 (Part 1) : 2016

1.     Clause related to vertical earthquake shaking is modified. The requirements are added for embankments, dams, bridges, etc. Also, the criteria for consideration of vertical earthquake shaking are modified. 

2.     The methodology for calculation of torsional irregularity is updated. The maximum displacement should be checked against the average displacement as against the minimum displacement in the previous version of the code. For more details, please refer the amendment.

 3.     For a building with re-entrant corners, three dimensional dynamic analysis to be performed with the flexible floor diaphragm. If there is a rigid diaphragm in the building then two separate analysis to be performed, firstly with flexible diaphragm and secondly with the rigid diaphragm. The worst effects to be considered from both the analysis.

 4.     For out of plane offset in vertical elements, the forces and moments due to earthquake effects in the elements connecting the two vertical elements with out of plane offset elements, the vertical element supporting the offset, and connections shall be enhanced by a factor of at least 2.5.

 5.     The provisions for stiffness irregularity are further clarified and few changes are made as well. In the note, it is mentioned that this provision is not applicable to such storeys, which have: (a) lower height, where services and utilities are housed, or (b) outrigger frame members placed in them.

 6.     For weak storey irregularity – buildings with strength irregularity shall not be permitted. In case, the weak storey is because of URM infills, provisions of 7.10 shall be followed.

 7.     Floating columns – Such columns are likely to cause concentrated damage in the structure, and are undesirable. A building with floating columns shall not be permitted, if the floating columns are part of or supporting the primary lateral load resisting system.’

 8.     Irregularity related to “Irregular Modes of Oscillation in Two Principal Plan Directions” is further clarified. It is also mentioned that this provision is not applicable to buildings with large podiums in the lower storeys.

 9.     For importance factor, “school” is replaced with the “educational building”.

 10.  OBF is not allowed in seismic zone III, IV & V.

 11.  Provisions for flat slab – structural wall system are further clarified.

 12.  Formula for Aw is modified and now it is same as when the code was published in 2016. It is mentioned that The value of Ta obtained shall neither be taken to be more than that given in 7.6.2 (a) nor less than that given in 7.6.2 (c).

 13.  In case of URM, RC members shall be designed for the governing combinations of stress resultants arising from structural analysis of:

a) Bare frame building, and

b) Frame building with URM infills.

14. For other details, please refer the amendment.

 Amendment no. 2 of IS 13920 : 2016

1.    Steel reinforcement shall comply with all of the following:

a) Elongation shall be at least 14.5 percent,

b) Ratio of ultimate stress to 0.2 percent proof stress shall not exceed 1.25,

c) Ratio of ultimate stress to 0.2 percent proof stress shall be at least 1.15, and

d) Steel shall be only of strength grades with minimum 0.2 percent proof stress of 415 MPa, 500 MPa or 550 MPa, in addition to other requirements of IS 1786.’

 2.     In cl no. 9.1.1, modifications are made for calculation of nominal shear strength of concrete in a beam-column joint.  

3.     In cl no. 9.1.2, provisions related to design shear stress demand are further clarified.

4. For other details, please refer the amendment. 

We are planning live technical discussion for the amendments on 20-DEC-20 at 11:00AM IST. Please share your comments / discussion points in the below comment box. We will discuss the same during live session of 20-DEC-20.

Link of the live session is attached below. Please like and share this video with the interested engineers in your circle.

Session 11 : Recent amendments for IS 1893 (Part 1):2016 and IS 13920:2016 – Live discussion

An online course related to earthquake resistant design will start from 17-MAR-22. Please watch the introductory video below:

EQ-STR-002 : Learn concepts of earthquake resistant design

Click below for more details and registration for EQ-STR-002

LEARN MORE
Categories
News & Events Quality Assurance Structural Engneering

Importance of Quality Assurance in Structural Engineering Firm

Thank you all for participation in the live session for “Importance of Quality Assurance in structural engineering firm” and for raising important discussion points. Bhavin Shah (Founder & CEO, SQVe Consultants) had conducted the session.

The link of video is shared below, in case you have missed out the live session.

Your further views/comments are welcome on the subject.