You are here:

Civil Engineering/criteria for tempeareture analysis of slab in rcc building

Advertisement

Expert: - 8/10/2007


Question
QUESTION: pls provide some guidline & references to decide whether temp anylisis of slab is require or not in builing, & also guidline  &  references for expansion joint in building , generally it is at  45 meter , in what condition it can be avoided

ANSWER: Hi Rupesh,

The 45-50m can be avoided if the structure is below ground (basements), otherwise you need to do a thermal analysis to work out the stresses in the slabs/walls and also to work out secondary moments in columns due to lateral displacement from the thermal movements.

I hope that helps!

Kind regards,

Arshad

---------- FOLLOW-UP ----------

QUESTION: Thank`s for reply, kindly brief structre below ground.
Is ground floor slab can be avoided which is coverign basement slab & also exposed to atmosphere. Can u suggest some reference code where i can get the information on the topics
1. need of thermal analysis
2. guidline regarding expansion joint


Answer
Hi Rupesh,

If basement is subjected to daily temperature variations then you will need movement joints- these can be up to 100m apart if thermal analyisis is done and appropriate rebar detailed.

Here is a good source for info:

http://products.ihs.com/cis/Doc.aspx?AuthCode=&DocNum=253481

Hope that helps!

Kind regards,

Arshad

Civil Engineering

All Answers

Answers by Expert:

Ask Experts

Volunteer

Arshad Khan

Expertise

I can answer any questions to do with civil and structural engineering consultancy and construction industry in East Africa and the Middle East, and specifically with the analysis and design of reinforced concrete structures. My particular expertise is in the aseismic design and optimisation of tall buildings.

Experience

Employment history: 36 years in Construction and consultancy in the UK, Kenya, Tanzania, Uganda, Ethiopia, Eritrea, South Africa, Somalia, Zambia, Austria, Bahrain, Kuwait, Doha and the U.A.E.

Organizations
.Fellow of Institution of Structural Engineers (UK) .Fellow of Institution of Civil Engineers(UK) .Member of the Institution of Engineers, Kenya .Registered Engineer, ERB, Kenya .Member of the Architectural Association of Kenya (Engineers Chapter) .Chartered Engineer (UK)

Publications
•1984: International Conference on the Art and Practice of Structural Design, London •1994: 3rd Int. Kerensky Conference in Structural Engineering, Singapore •2008: International Conference on High-Rise Towers, Abu Dhabi

Education/Credentials
BSc, 1st Class Hons, in Building Engineering, University of Bath, UK MSc in Concrete Structures and Technology, University of London. Diploma of Imperial College, UK.

Awards and Honors
•Science Congress Special Award (for 2-seater Hovercraft - 1968) •Institution of Civil Engineers Award for outstanding performance at Bath University (1975) •Concrete Society Postgraduate study Bursary Award (1976) •Consular Representative for British High Commission, Nairobi. (1995 to 1998) •Examiner for Institution of Civil Engineers Professional Interviews, Nairobi. (1997 to 1998) •Branch Representative in Vienna for PI assessment for Inst. of Struct. Engrs. (1999 to date)

©2012 About.com, a part of The New York Times Company. All rights reserved.