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Civil Engineering/Bearing shear wall system

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Expert: - 2/1/2008


Question
Hi, I am designing a 12 story concrete building with shear walls, the frame system is bearing wall system (R=4.5 according to UBC). My question is that the beam release or the connection between shear wall and beams should be rigid or pinned? can i assume them pinned in designing with ETABS or not?
Second: for exporting floor slab from etabs to safe i have to select which option ? floor loads only or the other two ones? what is the difference between them?

Many Thanks and Regards
Mahdieh

Answer
Hi Mahdieh,

Depending on the detailing, the beams can be fixed or pinned or partially relaesed and ETABS will do all. If you have them fixed, then use the property modifiers to make then cracked- between 0.4 and 0.25 is what one normally uses.

For SAFE export just select the loading that is applied directly to the slabs, rather than any to columns, walls, etc.

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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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