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Civil Engineering/Column Model in Etabs

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Expert: - 2/17/2011


Question
Dear Sir,

I think, a question i made yesterday is not clearly understood. My question was regarding modelling of single column having two different beams which are 2' apart but in same storey lvl (say 2 beams in x-dirn are 2' apart and eccentric column need to be modelled to rest these beams.) I tried with necessary offset values for frame joint offset from cardinal point and with frame stiffness transformed. Is this a correct method?

Thank You sir

Answer
Hi Sajeev,

In this case you are telling me that the column is 2 ft or more wide? The two ways you can model this is to either model the beam at the centre line and then apply a torsional moment equal to the shear times eccentricity, or else have a stiffer/transformed property beam modelled equal in length to the eccentricity, to which you can connect the beam in question.

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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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