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Civil Engineering/shear wall and slab connection



When there is a slab adjacent to shear wall
dead and imposed load will transfer to the shear wall.
is it require to have a beam along shear wall with shear link to transfer those loads to shear wall

ANSWER: Hi Priyantha,

If you are asking about modelling in ETABS, then yes you need to incorporate a beam, sutably meshed with the wall to transfer the slab loads.

If you are asking about actual construction, so long as diaphragm stresses are OK, there is no need for a beam- the slab can span straight into the shear wall.

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In a ETAB model structure  all the column ends make pin and shear wall ends fixed,

then lateral load is applied to a structure.
Is it correct to assume that lateral load is only taken by shear walls

ANSWER: Hi Priyantha,

That depends on what type of structure you are defining, as per UBC-97. Is it a bearing wall system (in which case walls are assumed to take all lateral load) or is it a dual system, in which case the frames and shear walls share the lateral load in proportion to their relative stiffnesses. In any case, column ends should not be considered pinned, as I have explained to you before.

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QUESTION: Dear sir

In one of the forums (linkdn- etab modellers) I asked the question
how to transfer the lateral loads only to shear walls.

(earlier this was answered by you "You can simulate reduced column/beams joint stiffness by modifying the beam end connectivity releases and then reinforce the beams accordingly.")

one answer was given
one model is prepared without applying lateral loads (column ends fixed,shear wall ends fixed) using those results columns and beams are going to be designed.

then other model is prepared (copy of original) make the column ends pin and apply lateral loads. those results are used to design the shear walls.

can you comment on this

Hi Priyantha,

The simulation suggeted is OK, except that it leads to conservative shear wall design and possibly under-designed frames at joints by ignoring forces due to lateral effects. In any case, the pinned ends should be applied to the beams, not to the columns.

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Arshad Khan


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.


Employment history: 40 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.

.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)

•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 •2013: IEK International Conference, Kisumu, Kenya

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 2010)

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