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Civil Engineering/Core Pilecap design

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Expert: - 10/29/2010


Question
QUESTION: Dear Sir,
Please advise how to check punching shear in core pile cap around the piles and along the walls.

ANSWER: Hi Maheswari,

If the piles are directly below the core walls, then there is no need to check for punching shear and the load path is directly down.

For other piles, just use the normal procedures as used for pile caps.

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

QUESTION: Thank you so much for your quick response sir. I have to check punching shear for (strip) pilecap below core walls. The core pilecap is not like a raft slab. Piles are located on either side of the core walls. Could you please advise me where i can find examples for checking shear in such cases?  

Answer
Hi Maheswari,

In that case you can check the punching shear for each pile like you would do for a pile-cap. The only difference is that if part of the "cone" of shear sits under the wall, then you ignore that portion and just assess the shear around the rest of the cone.

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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)

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